History Characters / TeenageMutantNinjaTurtles2003

* [[Characters/TeenageMutantNinjaTurtles2003Other Other Villains and Heroes]]

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[[folder: The Turtles and Splinter]]
The main heroes group. The TMNT with their master, Splinter.

!!As a whole

* LeParkour: And roof hopping as they are real urban ninjas.
* BadassFamily: Undeniably so, as they regularly fight off hordes of aliens, monsters, and maniacal humans.
* BaldOfAwesome: The Turtles by virtue of being hairless reptiles.
* ColorCodedCharacters: In the Mirage comics, the Turtles all wore red bandanas (not that it mattered much in a black-and-white comic), leaving their distinct weapons as usually the best way to tell them apart. The series follow the '87 choice of give Leonardo blue, Donatello purple and Michaelangelo orange, while Raphael kept red. Lampshaded in ''Turtles Forever'' when the Mirage Turtle call "silly" both the '87 and 2003 versions for this.
* TheTeam: The Turtles including their allies
** TheLeader: Leonardo, always in control.
** TheLancer: Raphael, will throw the first punch. His rivalry with Leo is played up in this series, and he's NumberTwo taking charge when Leo is absent.
** PluckyComicRelief: Michelangelo, the wiseguy.
** TheSmartGuy: Donatello, the brains of the bunch.
** TheChick: April, the only girl who cares for and is taken care of by the Turtles. She's MissionControl and a second SmartGuy to Donatello (her last job was working under Baxter Stockman). In the later seasons she picks up ninjitsu from Splinter to be more useful on the frontlines.
** TheBigGuy: Casey, the team's DumbMuscle and Raph's best non-mutant friend. Is even more of a typical BigGuy than Raph when he's involved. Stronger but the least skilled at ninjitsu or strategy in general.
** TheMentor: Splinter
* {{Foil}}: All four of them as a group and in pairs
** RedOniBlueOni: Raph and Mike are Red, Leo and Don are Blue[[note]]Their color-coding helps on this, even with Mikey (orange, which is close to red in the color spectrum) and Don (purple, which is closer to blue)[[/note]]
** FoolishSiblingResponsibleSibling: Mikey > Don ~ Raph > Leo
** AllWorkVsAllPlay: Leo and Mike
** TheHero vs TheLancer: Leo and Raph
** BrainsAndBrawn: Don and Raph
** HypocriticalHeartwarming: Raph towards Mike
** TheSmartGuy vs BookDumb: Don and Mike, sometimes played as academic intellect vs (pop) cultural awareness.
** [[AgentMulder Spirituality]] vs [[AgentScully Science]]: Leo and Don, but they're both levelheaded enough to defer to the other's expertise so they usually don't have any real tension when they pair up together.
* FourTemperamentEnsemble: Leonardo the phlegmatic, Donatello the melancholic, Raphael the choleric and Michaelangelo the sanguine.
* FutureBadass: Leonardo, Raphael, April, and especially Mikey, in "Same as it Never Was".
* HappilyAdopted: The Turtles love and respect Splinter as if he were their real father and outright call him "father" regularly. This bemuses the 1987 Turtles, who do not see Splinter as a father figure in the same sense that these Turtles do.
* KnowWhenToFoldThem: The Turtles sometimes invoke this, with Raph on one occasion settling on a "tactical retreat". This is also the Ancient One's first lesson, when a bitter Leo faces a losing battle against intangible demons.
--> '''Leo''': To surrender is ''not'' the warrior's way!
--> '''The Ancient One''': You won't be much of a warrior without a head!
* {{Metamorphosis}}: From turtles to humanoid turtles, and from a rat to a humanoid rat.
* NamedAfterSomebodyFamous: They are all named after iconic Renaissance artists.
* {{Ninja}}: They are a clan of ninjas.
* TrademarkFavoriteFood: Averted in this series. Direct references to pizza are intentionally few and far between across the seven seasons, and they often mention eating ice cream, Chinese food, hot dogs, and various other foods. However, pizza is still the most potent health item in most video games based in this continuity.
* TrueCompanions: BadassFamily plus friends.
* UndyingLoyalty: To each other.
* WeirdnessMagnet: Noted several times:
--> '''Michelangelo:''' How come all the weird stuff always happens to ''us''? I mean, we were just minding our own business, when WHAM, that time lady fell out of the sky, right on top of us! Now we're stuck here AND we've gotta go to that creepy-looking place! It just doesn't seem fair!!!
* WouldHitAGirl: The Turtles have no problems with attacking Karai, although to be fair, she is more than capable of holding her own in a fight.

!! Leonardo
[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/2509310_turtle287.jpg]]
-->Voiced by: Creator/MichaelSinterniklaas

The leader. In this version, he is more well-balanced and serious than in the 1987 TV series and first three films. Like the Mirage comics and the film pentology, Leo and Raphael have disagreements constantly, particularly in the City at War trilogy.

* TheAce: Becomes arguably the most skilled of the four brothers due to also spending a lengthy amount of time training under the Ancient One, and was the first of the Tribunal's warriors to manifest a dragon avatar.
* AuthorityEqualsAsskicking: Consistently the most skilled Turtle, he falls into the leadership role by default.
* BadassLongcoat: In "Same As It Never Was".
* BigBrotherInstinct: Even though he's never officially stated to be the oldest.
* TheChainsOfCommanding: Michelangelo notes this in "Samurai Tourist", that Leo takes the burden of being the leader so his brothers can do what they want: Dontaello's free to pursue his technological inventions, Raphael's free to let loose and fight, and Mikey's free to just relax because their brother's in control.
* CharacterDevelopment: Really beautifully put into the mix in season 4 where he becomes the best fighter of the bunch while trying and failing to master his anger and fear after being defeated and stabbed in season 3.
* CulturedWarrior: If one of the turtles is going to be in touch with Japanese traditions, it's gonna be Leo.
* {{Deconstruction}}: In "Samurai Tourist", Mikey--yes, ''Mikey''-- gives an accurate analysis as to why Leo takes the burden on being the leader: so that he lets his brothers be themselves.
-->'''Mikey:''' I think you all [Donatello, Raphael and Casey] should just lay off the poor guy [Leonardo]. I mean, it can't be fun always being the responsible one. And we're the ones who really benefit: Raph's free not to think cause Leo does all the thinking for him, Don's free to dream, and I'm free to take it easy all because Leo's busy being responsible enough for all of us.
* {{Determinator}}: Even when he's up against an impossibly powerful enemy, Leo won't give up until he's unconscious or worse.
* DualWielding: He always wields two swords, and if one is broken he still fights with the other one.
* EmotionsVsStoicism: A lot of what he puts up with has him wondering if he should fight or remain still.
* HeroesPreferSwords: As the leader of the group, Leo gets the shiny swords.
* HeroicBSOD:
** After being ambushed by the entire Foot Clan and being easily defeated by the Foot Elite, and his family being forced to evacuate New York after April's home is destroyed, Leo falls into a state of depression. Raph is able to help him get out of it by training him to get back into fighting shape, and by forging a new pair of swords.
** After the Turtles and Splinter are forced to commit suicide to stop Shredder in "Exodus", Leo is traumatized, feeling that because he wasn't good enough, his family had to kill himself. He remains in this funk for most of Season 4, before training with the Ancient One helps him learn that he isn't at fault for not being able to do anything else.
* HeroicSpirit: A big reason why he's a determinator.
* HesBack: Happens to Leo twice: First during "Return to New York", when he confronts the Foot Elite which nearly killed him during their first encounter, and again in "Prodigal Son", the conclusion to his season 4 character arc.
* HeterosexualLifePartners: With [[ComicBook/UsagiYojimbo Miyamoto Usagi]].
* KatanasAreJustBetter: Obviously. Although Leonardo's swords are often much more closely modeled around the [[http://en.wikipedia.org/wiki/Ninjato ninjato]].
* KnightTemplar: Leonardo's story arc in the 4th season have him nearly cross over into Knight Templar territory. His rage gets so bad he actually ''wounds'' Splinter and has to be sent away to Japan to learn from Splinter's master.
* MasterSwordsman: He uses his katana very skillfully.
* MyGodWhatHaveIDone: Leonardo has an example of this in "The Ancient One", when he [[spoiler: loses control and injures Master Splinter.]] The look on his face after it happens and his subsequent remorse show he was clearly shocked, and deeply regretted his actions.
* NoHoldsBarredBeatdown: He gets into quite a few of these. If he's not on the receiving end, he's usually administering it.
* RedOniBlueOni: The blue to Raphael's red.
* {{Samurai}}: Leonardo is technically a ninja, but a lot of the tenets he quotes are in line with samurai. It's no surprise he and Usagi got along swimmingly.
* ScarsAreForever: To an extent. In the Season 3 finale, [[spoiler: Karai--whether accidentally or not--stabs Leo. Her sword goes through his shoulder and out the side of his upper shell. All throughout Season 4 the crack in his shell remains as he descends into Knight Templar territory, and even after he recovers it refuses to heal. Not until the ''Fast Forward'' reboot, anyway.]]
* SlidingScaleOfIdealismVersusCynicism: He starts out at the very end of the Idealism scale, even believing the best of the Shredder and then his daughter Karai. As the seasons progress he shows signs of being capable of sliding down the other way--he does this in the fourth season--though he remains mostly rooted in idealism.
* TheSpartanWay: Leonardo as a child was suffering from a fear of heights. Splinter brings him to the top of a gigantic reservoir and pretends to be in danger of falling. Leonardo forces himself to crawl out and save him, and apparently conquers his fear in the process.
* TookALevelInBadass: In the first season he can barely handle fighting one of the Foot Elite, and is nearly killed trying to take on all four. By the end of the fourth season, he not only takes on all four without apparent difficulty, but also bests Karai, the incumbent Shredder, in the process.
* TookALevelInJerkass: During the first half of the fourth season, combined with HeroicBSOD. He had a really good reason.
* WeaponOfChoice: [[DualWielding Twin]] {{Katana|sAreJustBetter}}. He briefly takes on Feraji's sword in mid-season 5.
* WhatTheHellHero: In a reverse from usual situation, Raph calls Leo out in 'The Ancient One' for [[spoiler: injuring Master Splinter when Leo loses control in a fit of rage.]]
-->'''Raphael''': Leo, what the shell is your problem?!
* WreckedWeapon: Done to Leonardo's swords in the episode "The Shredder Strikes Back, Part 1", as the climax to the ass-kicking the character gets in that episode. And again in "Big Brawl, part 1" by a Gom-Tai.

!! Raphael
[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/2509184_turtle243.jpg]]
-->Voiced by: Frank Frankson

Raphael's personality is more like his original incarnation—he is angrier and more sardonic, but not quite as violent (although he is still impulsive). One incident emphasising his quickness to anger is where he almost smashed Michelangelo's head in with a pipe is shown here. In this carnation Raphael talks with a similar Brooklyn accent used in the movies.

* AloofBigBrother: Partially inverted. He's younger than Leonardo making him an aloof little brother, but older than Donatello and Michelangelo, playing it straight for them.
* BadassBiker: He is shown to be a skilled motorcyclist and has his own motorcycle, the "Shell Cycle".
* BashBrothers: With Casey.
* BerserkButton:
** He loves his bike and quickly turns to rage if anyone messes with it.
** Did we mention how much Raph hates bugs? In "April's Artifact", he gets pushed too far after recovering from the paralysis given to him by one of the hornets, declaring in a PunctuatedForEmphasis fashion that bugs must pay.
* BigBrotherBully: To Mickey.
* BigDamnHeroes: In the "City At War" arc (with some help from Splinter).
* BrooklynRage: Not only because he's an angry New Yorker - the first movie even gives him a Brooklyn accent.
* CatchPhrase: "I got your X right here." and also "You and me are having words."
* DeadpanSnarker: To the point where he should be the picture for the trope.
* DrivenByEnvy: Downplayed. Raphael appears to live in the shadow of Leonardo and resents his brother's social position in the group. However, though at times he may seem quite jealous of Leonardo, Raphael's rivalry with him is heavily toned down in comparison to the comic books, and Raphael rarely shows a deep hatred towards Leo as the series progresses.
* FireForgedFriends: With Casey, as they originally came to blows numerous times when they first met. However, facing off with the Purple Dragons not only integrated Casey into the Turtles' family, but solidified their friendship.
* HairTriggerTemper: Especially early on in the series.
* HeelRealization: In "City at War part 3".
* HotBlooded: ''"Count on Raphael to throw the first punch!"''
* JerkWithAHeartOfGold: He's more abrasive than the others, but is still as noble as the other Turtles.
* JerkassFacade
* JerkassHasAPoint: Raph's attitude during the "City at War" trilogy. WhatTheHellHero stems from the fact that he refuses to believe that the Turtles were responsible for New York's gang war between the Foot Clan, Purple Dragons, and the Mob and he sounds like he doesn't care about the innocent people who have been caught in the crossfire. This stems from his statement that the Turtles' involvement would only "add fuel to the fire", in other words, make the situation worse and to be honest, Raph wasn't wrong; apart from Leo saving a gang of mobsters from an exploding warehouse and evacuating a man trapped in a bus, the Turtles weren't making much progress to end the war until Karai showed up and offered a truce.
* MiddleChildSyndrome: Played with. Raphael isn't the middle turtle, but he feels as if no one understands him.
* NumberTwo: He's generally calling the shots when Leo isn't around.
* RedIsHeroic: He's always a hero but typically in on-going series he plays the lancer to Leo while in one-off stories he is the main protagonist who has to overcome this anger.
* TheyReallyDoLoveEachOther: Despite sometimes being a jerk to his brothers, Raphael is very protective of them.
* ThisIsUnforgivable: Raph doesn't take too well to having been paralyzed by one of the hornets in the episode "April's Artifiact".
-->'''Raphael''': [[PunctuatedForEmphasis Bugs... must... PAY!]]
* ThrowingYourSwordAlwaysWorks: Raph throws his sai a lot.
* TookALevelInKindness: It's more so "losing a level in jerkass", but by ''Back to the Sewers'', Raph was no longer beating up Mikey or challenging Leo's authority, though he still flung a few insults here and there and even those were reduced.
* WeaponOfChoice: SaiGuy.
* WhatTheHellHero: In "Meet Casey Jones", Leo and Don call Raph out when he loses his temper and almost attacks Mikey with a metal pipe.
-->'''Leonardo''': Raphael! Have you lost your mind?!
-->'''Donatello''': You OK, Mikey? What were you thinking, Raph?!
* WhyDidItHaveToBeSnakes: A running gag throughout the world of TMNT is Raphael's fear of bugs (entomophobia). However, in this carnation, it is less a phobia, and more of an intense hatred and disgust
* YouHaveGotToBeKiddingMe: Raph loves using this.

!! Michelangelo
[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/2500762_turtle303.jpg]]
-->Voiced by: Creator/WayneGrayson

Known as "Mikey" to his brothers, his personality is more akin to the Mirage comics than the 1987 TV series. Still the comic relief, he often makes statements that spoof pop culture, although he uses less surfer language than in the 1987 cartoon series. His trademark nunchaku are once again his primary weapons, but he has used other weapons such as grappling hooks and those of his brothers.

* ArbitrarySkepticism: Michelangelo is the first to encounter Leatherhead, and when he tells them, the rest of the Turtles disbelieve him. At this point in the series, they have already encountered/know the existence of ninjas, criminal organizations, superheroes, cryptids, aliens, and mystical forces, yet a giant crocodile (mutated in the same way they were) is unbelievable. Leo does admit to remembering the giant alligator he encountered with Raph in the sewers when they were young, however.
* AttentionWhore: Especially after he wins the Battle Nexus tournament.
* BadassAdorable: Silly, loves him some comic books, childish, always willing to crack a joke and and can kick tons of asses with his nunchucks.
* BewareTheNiceOnes: He's the friendliest and silliest of the Turtles, but he can be downright dangerous when he wants to be.
* BewareTheSillyOnes: Raph thought he was in for a cakewalk when they were matched up in the Battle Nexus. Unfortunately, years of joking on Raph means that Mikey knows ''exactly'' how to push his buttons and make him come undone. Mikey wins the fight with almost nothing but his mouth.
* BigEater: He'd often annoy his brothers by eating all the pizza.
* BrilliantButLazy:
** He's usually portrayed as having great potential, but because of his more laidback personality, he'll focus on something more fun instead. Despite training the least, he's usually seen as at least being a better fighter than Don. He managed to beat Raph in the Battle Nexus, (and win the tournament overall via fluke at first, but later legitimately defended his title in a rematch that was rigged against him). Splinter notes that if he trained as seriously as the others, he would probably be consistently the best turtle.
** This is enforced with his WeaponOfChoice (the chucks, see below), the laziest of the turtles is the one wielding the most complex and difficult weapon. That's not something one can do without a gift for it.
** "Graduation Day: Class of 2105" has him nearly fail to graduate to the next rank of ninjutsu because he's been slacking off too much, but he's able to make it up in one night or so.
* ButtMonkey: If any of the Turtles klutzes out or has something bad happen to them for comic effect, it's Michelangelo.
* CatchPhrase: The most famous "Cowabunga!"
* CharacterDevelopment: Michelangelo finally grows up, begins to use his innate skills to his full potential, and proves his worth as a thoughtful member of the team.
* {{Cloudcuckoolander}}: Generally the most whimsical of the turtles.
* CrouchingMoronHiddenBadass:
** In Michelangelo's first centric episode, he becomes a superhero, saves another superhero, and during all this learns a lesson on why he's a ninja: because it's what he does best.
** In "Touch and Go", Splinter tells him that he is the most naturally athletic of his brothers and he is crowned the winner of the Battle Nexus on a technicality (although with Leo's training, he wins outright in "Grudge Match").
* FunPersonified: The most consistent source of laughs and fun in the series, even during its darker moments.
* TheHeart: Although he exasperates his three brothers on a constant level, when a serious rift between their bond takes place, he usually is the one to try and patch things up...usually via humor.
* HiddenDepths: In spite of being the laziest of the Turtles, he's the one with ''two'' of the weapon that's the most difficult to master. He's also surprisingly introspective and sometimes analyzes the nature of his brothers.
* HooksAndCrooks: He uses one briefly as a callback to precendent show.
* TheGadfly: He ''loves'' to rile up his brothers, especially Raphael, by annoying them with puns, jokes and chatter at inappropriate moments. Sometimes he's not annoying them on purpose, but other times he ''definitely'' is.
* JerkWithAHeartOfGold: Perhaps unintentionally from the creator's perspective, but he can be a pretty big jerk in this series, partly due to his frequent InnocentlyInsensitive and ItsAllAboutMe moments, as well as his role as TheGadfly. However, he's never malicious or intentionally cruel, and when it comes down to it he really is a good guy who wants everyone to get along.
* JumpedAtTheCall: He's usually the most nonchalant about all the weird and out-there places the Turtles are taken to - especially when it involves superheroes.
* {{Keet}}
* TheKnightsWhoSaySquee
* LargeHam: Especially as the Turtle Titan.
* LegacyCharacter: Not himself, but his superhero persona, the "Turtle Titan", inspires Silver Sentry's descendant around the year 2105 and he begins work under the title. Mikey is initially enraged and tries to undermine him until he learns how much his old persona meant to the kid, and relents.
* LovableCoward: This incarnation of Michelangelo is a bit of a scaredy-cat compared to other versions, at least early on. He's by far the most easily spooked of the Turtles, and the one most likely to scream in fear or suggest giving up in the face of overwhelming adversary. Over the course of the series he gradually becomes more of a CowardlyLion, and at the end of the cartoon his cowardice has pretty much vanished.
* LeeroyJenkins: He doesn't usually think of a strategy before heading into battle.
* PapaWolf: To his kitten, Klunk. When Karai attacks the lair in Season 4, he pulls out all the stops to escape with Klunk unharmed, and the kitten is better taken care of then he is.
* PluckyComicRelief: He got this role in the show and held onto it throughout all other incarnations.
* PungeonMaster: Michelangelo, much to his brothers' continued annoyance. He constant puns almost always trigger negative reactions from his brothers, ranging from groans, {{Facepalm}}s, and derogatory looks, to outright physical punishment such as head-slaps, flicks and pulling the ties of his ninja mask. His brothers aren't immune to it either: on the rare occasions when one of them says a bad pun they'll almost always get a similar Lame Pun Reaction from another turtle, though it's typically not as aggressive as the reactions dished out on Mikey.
* RealMenWearPink: In ''Back to the Sewers'' he was positively ''delighted'' when April asked him to be her Maid of Honor, when people tried to call him the more gender-neutral "Turtle of Honor" [[InsistentTerminology he would correct them.]]
* ScreamsLikeALittleGirl: Does he ever.
* SecretIdentity: Turtle Titan, a superhero he drafted up in "The Unconvincing Turtle Titan".
* TheSlacker: Splinter even calls attention to the fact that he's the most naturally talented, but trains the least.
* SurferDude: Less compared to Fred Wolf cartoon, and it tapers off almost entirely after Season 1.
* UnsportsmanlikeGloating: Michelangelo's preferred method of handling victory.
* WeaponOfChoice: FightingWithChucks.

!! Donatello
[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/2500577_turtle296.jpg]]
-->Voiced by: Creator/SamRiegel

Donnie is still the smartest turtle like all of his incarnations. Like the other turtles except for Raphael, he loves the future for its new technology and gadgets.

* {{Adorkable}}: Especially when squeeing over new technology.
* BadassBookworm: He's an OmnidisciplinaryScientist par excellence as well as a skilled warrior.
* BadassInDistress: The time he was captured by the Triceratons, and the end of the outbreak arc after being mutated a second time. Less dramatic instances are scattered throughout the series, too, usually when it would be easy for him to solve a problem/end an episode before its time.
* BadassPacifist: He would prefer not to use his weapons and fists to solve a problem. Emphasis on ''prefer''.
* BewareTheNiceOnes: He may be the most gentle of the Turtles, but you don't want to earn his genuine wrath.
* BewareTheQuietOnes: Usually the quietest, most thoughtful member of the team, but also one of their most crucial assets and leaders.
* BigLittleBrother: Taller than Leo but, fittingly, tied with Raph.
* BondBreaker: Donatello was warped into an alternate future where he had disappeared for 20 years. Without his resourceful, tech savvyness, the Turtles were disbanded and the Shredder had succeeded in world domination. The supporting cast made up the last rebel resistance.
* FightingFromTheInside: A variant while he was prisoner on board the Triceraton mother ship, resisting against borderline MindRape. He held out for awhile, but needed help to fend the assault off.
* FirstPersonSmartass: Whenever he's the one voicing the opening narration.
* FutureMeScaresMe: One episode of the Fast Forward season has a future journal suggesting that robot butler serling might be Donatello's future self. Donnie and his brothers are grossed out by the idea. [[spoiler: Fortunately, the journal is a fake set to discourage the turtles from trying to learn too much about the future]].
* GadgeteerGenius: Considering that he's self-taught, living in a sewer, and working mostly with scavenged junk, Don's inventing abilities are downright super-reptilian.
* GentlemanSnarker: He's second only to Splinter where polite snarking is concerned.
* HeroicBSOD: Like Leonardo, he suffers one in the 4Kids series' last season up until the end of episode 5. Cody finally manages to fix his Time Window to send the turtles and Splinter back to the present, but due to some inteference from Viral, Splinter is vaporized and it's later revealed that he's trapped in cyberspace.
* IntelligenceEqualsIsolation: Not often, but on occasion he's sequestered off in his lab. Most noticeable in 'Return to the Underground'.
* TheKlutz: A trait that doesn't come up often-- but if/when it does, it's always in the middle of a fight or stealth mission.
* LovableNerd: Ever so much.
* {{Metamorphosis}}: Twice-- once in the backstory, once at the end of the fourth season.
* MrFixit: Generally can be counted on to fix most anything.
* NiceGuy: A gentle, sweet soul.
* OmnidisciplinaryScientist: He's a genius mechanic, but usually also has knowledge of biology.
* OOCIsSeriousBusiness: Played backwards, actually. We get the 'serious business' part within the first few minutes of ''Same as it Never Was''. Just before the episode's BittersweetEnding, the [=OoC=] part comes in.
* OutOfCharacterMoment: Don [[spoiler: absolutely ''slaughters'' Ch'rell]] at the end of ''[=SaiNW=]'', a far cry from his [[TechnicalPacifist usually pacifistic]] actions. [[JustifiedTrope Understandable, of course]] [[BadFuture given the circumstances.]]
* PrecociousCrush: He has one on April. It eventually goes away as he sees that she and Casey become seriously involved.
* TheProfessor
* TheReliableOne
* ResistTheBeast: Happens to [[spoiler: Donatello in "Adventures in Turtle Sitting". He even begs April and Casey to "stay away from" him as he runs off, before he mutates fully and starts to attack them.]]
* SesquipedalianLoquaciousness: Donatello, being the smart turtle, is particularly fond of this. A notable example is in "The Shredder Strikes Back, Part 1", when he and Raphael are watching a football match on television.
--> '''Raphael''': 'Panthers', 'Rams', 'Bears', they even got 'Dolphins'. You'd think they'd have room for something a little more...reptilian.
-->'''Donatello''': The 'Turtles'? My friend, unfortunately the lowly turtle has been saddled by society with the stereotype of being velocity challenged.
-->'''Raphael''': Say what?
* TeenGenius
* ThisIsUnforgivable: In "Same as it Never Was", after stating a BigNo upon watching the Karai Legions kill Future Mike to his horror, Don gets pushed too far. His response? "You'll pay for this, Shredder! If it's the last thing I do, YOU WILL PAY!"
* WeaponOfChoice: SimpleStaff.
* WeirdnessMagnet: Even amongst his brothers.
* WrongGenreSavvy: Demonstrated a couple of times -- like trying something he [[SawItInAMovieOnce saw in a movie]] during a fight with the Foot. It doesn't work.

!! Splinter
[[quoteright:222:http://static.tvtropes.org/pmwiki/pub/images/splinter_thinking.jpg]]
-->Voiced by: Darren Dunstan

Splinter is the adoptive father of Leonardo, Raphael, Donatello, and Michelangelo. He raised them and taught them in the art of Ninjutsu. He is portrayed as a dark gray rat in monk's robes and is stated to weigh 90 lbs.

* AdaptationDyeJob: Splinter's fur is turned gray for this series.
* AdventureRebuff: Splinter tries this several times, unsuccessfully.
-->'''Splinter''': How many times have I told you not to sneak out to the surface?
-->'''Michelangelo''': This month?
-->'''Donatello''': Five hundred and twelve, actually.
* BadassGrandpa: He's much older than the Turtles, but is still a capable fighter when he needs to be.
* BigGood: He and the Ancient One take up the role in the back half of the fifth season.
* BowAndSwordInAccord: Splinter is armed in this manner in the first episode of the "Exodus" two-parter.
* ButtMonkey: He sometimes finds himself on the receiving end of his sons' antics.
* CoolOldGuy: Sometimes joins the Turtles in their pastimes.
* DeadpanSnarker: Fans tend to agree that he has some of the best lines in the show.
* ElementalRockPaperScissors: How Splinter defeats the Foot Mystics during their initial battle.
* GentlemanSnarker
* GratuitousJapanese: Splinter will occasionally use this.
* {{Koan}}: Splinter is fond of these. Subverted on one occasion when he had to explain what he was saying.
--> '''Splinter''': Remember, my sons, even the mighty oak bows before the raging storm winds.
--> '''Mikey''': Huh?
--> '''Splinter''': Be careful and do not become overconfident!
* NotSoAboveItAll: He loves his soap operas, beats out Casey and Raph in poker several times, snarks periodically about his sons' antics, and even cracks a joke here and there.
* OldMaster: An elderly master of ninjutsu.
* OffhandBackhand: When the Shredder and the Foot Ninja attack April's antique shop, Master Splinter smacked a Foot Soldier with his stick without even turning back. He does this again to another Foot ninja when Karai invades the Lair and maybe once more at one point in between.
* OverprotectiveDad: Not just towards the turtles but also towards April, Casey, and Cody (who also has Serling).
* PapaWolf: He will not take kindly to anyone who harms his four students.
* ParentsInDistress: For all of the times Splinter has rescued his sons, he has to be rescued by them often as well.
* RodentsOfUnusualSize: While he's still the shortest of the main cast, he's much larger than any normal rat.
* SimpleStaff
* SophisticatedAsHell
* TeamDad: To the Turtles and eventually to Casey and April, helping the latter two deal with their training and even relationship problems.
[[/folder]]

[[folder:Allies]]

!! April O'Neil
[[quoteright:217:http://static.tvtropes.org/pmwiki/pub/images/2071173_aprilfamily2.jpg]]
--> Voiced by Veronica Taylor

April O'Neil is an ally and big sister/motherly-figure to the Teenage Mutant Ninja Turtles.

* AdaptationDyeJob: April's hair is now unnaturally red and given a purplish tone.
* AllGirlsWantBadBoys: April is shown to have an attraction to Casey Jones, though their contrasting personalities often make them bicker.
* BadassBookworm: A highly intelligent scientist ''and'' a certified Badass.
* BareYourMidriff: April initial outfit includes this, and is in fact apparently considered appropriate attire for her job as a lab assistant.
* BattleCouple: With Casey, eventually.
* [[CoolBigSis CoolBigSibling]]: April and Casey, who are 23 and 24, respectively, at the start of the series, are this to the teenaged turtles, who're supposed to 15 at the start of the series and about 18 or 19 at the end.
* HotScientist: Just as in the Mirage comics, April started out as a 23-year-old science assistant to Dr. Baxter Stockman before he went openly evil.
* LettingHerHairDown: Inversion: If April's hair isn't in her trademark bun the situation generally isn't good.
* MissionControl: This version of April makes much more use of her scientific expertise and she often uses her computer skills to aid the Turtles.
* MsFanservice: Thanks to her BareYourMidriff outfit, and other outfits in the series including her jungle garb during "April's Artifact". However thanks to her CharacterDevelopment, she becomes far more than just eye candy as the series moves on.
* {{Ninja}}: In-training from Season 3 and onward when she starts getting lessons from Splinter.
* NotSoAboveItAll: Most notably in "April's Artifact" where she gets ''waaay'' into the JunglePrincess role and "The Christmas Aliens" where she sticks a spoon on her nose and grins stupidly.
* TookALevelInBadass: In season 3, when Splinter teaches her martial arts.
* UnfazedEveryman: After her intial scream and/or faint upon meeting the turtles she becomes this.

!! Casey Jones
[[quoteright:295:http://static.tvtropes.org/pmwiki/pub/images/casey.jpg]]
--> Voiced by Marc Thompson

Casey Jones is a hockey-masked vigilante who fights crime at night.

* BadassNormal: The only member of the team who has never had any mutant powers or abnormal origins in any continuity. Ninjitsu also doesn't rub off on him the way it does on April.
* BashBrothers: With Raph.
* BattleCouple: With April.
* BatterUp: Often wields a bat as well as his signature hockey puck.
* TheBerserker: Initially.
* BigDamnHeroes: Gets to do this occasionally.
* BoisterousBruiser: Often on the frontline and loves it.
* BrooklynRage: Has a Brooklyn accent and is easy to anger.
* {{Catchphrase}}: It's revealed that the young turtles were teaching him all about martial arts and fighting (although they never found out) and each took turns to teach him what they knew. The cry comes from when Mikey was training him and told him to say "Gorogoro-sama!" (translation: Lord Thunder). But since Casey couldn't pronounce it correctly, he made his famous phrase Goongala!
* CombatPragmatist: Even the bad guys admit that Casey just plain ''fights dirty''.
* [[CoolBigSis CoolBigSibling]]: April and Casey, who are 23 and 24, respectively, at the start of the series, are this to the teenaged turtles, who're supposed to 15 at the start of the series and about 18 or 19 at the end.
* DarkAndTroubledPast: Casey's hatred of crime is rooted in this incarnation in his childhood. While Casey was still a kid, his father Arnold Casey Jones, Sr. refused to pay protection money to the Purple Dragons. His father's shop was burned down as a result, and a teenage Hun threatened Casey to tell his father to pay up next time. Despite being threatened not to, Jones, Sr. subsequently went to the police, but with no success; it is implied that the Purple Dragons later killed him for trying to turn them in.
* EmbarrassingFirstName: Arnold. Casey is his middle name.
* FireForgedFriends: His friendship with Raphael consistently begins this way, and leads him to befriending the other turtles.
* GoodIsNotNice: In his debut episode. He gets better though.
* HeroesWantRedheads: Casey Jones with April O'Neil. The series even takes their relationship all the way as by the final season, they get married. April herself was much more of an obvious redhead than any previous incarnation as well.
* ImprobableWeaponUser: Hockey sticks, baseball bats, golf clubs, croquet mallets, cricket bats...
** The last being really amazing because you gotta know what a crumpet is to understand cricket!
* IKnowMaddenKombat: Casey uses sports equipment as his main weapon.
* JerkWithAHeartOfGold: All versions have him being a jerk to at least one of the heroes, but they all still have a heart.
* {{Leitmotif}}
* MaskPower: When going into action, Casey usually wears an old-style hockey mask.
* OvershadowedByAwesome
* TookALevelInBadass:
** Casey undergoes a bit of this in ''Back to the Sewer'' when training under [[TheDragon Master Khan]] (he manages to sneak attack and take down all four of the Turtles in this episode) but brainwashing is involved and the show doesn't give any strong indication of whether he retained his newfound fighting skills afterwards.
** However, Casey still applies to this trope as it was revealed that when he was young, Casey lacked the confidence he shows as an adult, until the Turtles trained him to be assertive.
* VigilanteMan: As he grew older, Casey became a vigilante and started hunting down crooks — particularly Purple Dragons — in the streets. until he meet Raph.
* YouGottaHaveBlueHair: Has black-blue hair.

!! Leatherhead
[[quoteright:302:http://static.tvtropes.org/pmwiki/pub/images/leatherhead.jpg]]
--> Voiced by F.B. Owens (Season 2-3), Gary Lewis (Season 4-BTTS)

An ally to the turtles with a scientific mind like Donatello and is often referred to as "LH.".

* AdaptationalIntelligence: His past incarnations were never particularly bright, but this Leatherhead is easily the smartest incarnation of the character to date, rivaling Donatello's intellect (though he later confesses to being inferior to Donnie's smarts).
* TheBerserker: After being experimented on and tortured by Bishop, this side of him will come out and you better hope you're not aligned with the Shredder or Bishop in any way.
* ButNowIMustGo: He stays with the Turtles in early Season 3 following being freed from Bishop, but eventually decides that his temper is too volatile for him to continue living with them. He establishes a base in a nearby abandoned subway tunnel.
* EmotionalBruiser: This version was quick to show off just how tender-hearted he is in addition to how tough he is.
* GeniusBruiser: Here he is not only intelligent but also well versed in various technical and scientific fields and therefore the Turtles and their friends (including Professor Honeycutt) find not only his giant strength but also his great intelligent helpful.
* {{Metamorphosis}}: From alligator to humanoid alligator everywhere else.
* MyGodWhatHaveIDone: Leatherhead says this almost word for word when he attacks Michelangelo in a fit of uncontrollable rage, leaving him unconscious and fearing him badly hurt/dead.
* NoHoldsBarredBeatdown: In "Exodus, Part I", Leatherhead finally comes face to face with the Shredder. Enough said.
* SewerGator: He was a pet alligator that was flushed into the sewers before he was mutated.
* SixthRanger: To the Turtles. He's often called in as extra support in their battles against Shredder and Bishop.
* UnexplainedRecovery: Hun and Leatherhead both appear to [[DisneyVillainDeath fall to their doom]] in ''"Exodus, Part 1"''. They both appear later with no explanation of how they survived or what happened to them immediately after the episode. Granted, their fall was indoors and it is rather hard to determine how far they fell (and unlike the Gyoji, it is rather doubtful that the writers intended this to be their death).
* WhatHappenedToTheMouse: He doesn't appear in Season 5, even with the threat of the Tengu Shredder and the fact that the Turtles summon almost ''every'' recurring character they can think of. He's later absent from all of Season 7 except the finale, despite the fact his technological savvy could've been of great use in recovering Splinter's data.
* YouCantGoHomeAgain: Leatherhead initially yearns to rejoin the Utroms.

!! Professor Honeycutt/The Fugitoid
[[quoteright:320:http://static.tvtropes.org/pmwiki/pub/images/fugitoid_returns.jpg]]
--> Voiced by Pete Zarustica

A scientist whose mind was accidentally transferred into a robot's body, and is forced on the run by groups who would use his inventions for their own purposes.

* BadassBookworm: Becomes one as the series goes on.
* BrainUploading: The most commonly accepted explanation for his existence, although doubts are eventually raised as to whether this is the case.
* DisneyDeath: He sacrifices himself to cripple the Triceraton and Federation forces in the "Space Invaders"/"Worlds Collide" arc, and is given a space burial, but later returns several episodes later into the season.
* EleventhHourRanger: To the Turtles in late Season 3, assisting them in their final assault on the Shredder.
* HeroicSacrifice:
** Pulls one in early Season 3 to cripple the war over his teleporter, but later returns alive and well.
** At the end of Season 3, he agrees to join the Turtles and Splinter in their attempted TakingYouWithMe to Shredder.
* JustAMachine: Although it's not true, he is considered this by The Federation.
* TheProfessor: Obviously.
* PutOnABus: In early Season 2 he leaves to live with the Utroms. At the end of Season 3, he returns to them and isn't seen again until the series finale.
* StopHelpingMe: In Season 3 he's trying to surrender himself to the Triceratons now that he's wiped the data of his teleporter from his memory, and is annoyed that the Turtles are trying to save him from the warring aliens.
* TookALevelInBadass: In the series finale, he's the very first of the Turtles' allies to leap into the fray against the Cyber Shredder's forces.
* UndyingLoyalty: To the Turtles.
-->'''Honeycutt''': I am with you until the end.

!!Renet
--> Voiced by

An apprentice "Timestress" whose job it is to oversee and protect the timestream.

* CharacterDevelopment: She's largely much less of a whiny jerk in her second appearance, due to having gotten some experience with the Time Scepter.
* TheDitz: Renet is shown to be quite a scatterbrained person who came to her friends with good intentions, but with little practical skill she caused some problems across space and time.
* ForgottenPhlebotinum: She's completely and inexplicably absent from the ''Fast Forward'' season, where the Turtles are stuck in the future -- because if she'd appeared she could instantly have fixed their predicament.
* MostCommonSuperpower: She is notably endowed as well.
* NiceJobBreakingItHero: Already in her first appearance, Renet was sentenced to dusting in Lord Simultaneous library because she had accidentally reversed the evolution on a planet of giant worms, and got a six-week penalty. Quickly, she tried to use the Time Scepter to get though her sentence quickly. However, this played into the hands of Savanti Romero, who caused the arrival of the scepter with black magic.
* TheLoad: Due to not knowing how the Time Scepter works, and not really having any combat prowess, she's largely useless in a fight. Even the Turtles grow exasperated with her in her first appearance.
* TimePolice: One in training, anyway.
* TrueBlueFemininity: Her outfit is mostly blue and it matches her InnocentBlueEyes.
* ValleyGirl: Her speech is this.

!!Miyamoto Usagi
-->Voiced by Jason Griffith

The guest-starring character from the comic ComicBook/UsagiYojimbo.

* BashBrothers: With Leonardo. The two became very fast friends, and Usagi even goes to the point of calling Leo ''brother'' during "The Real World" parts one and two. It helps they have the same weapons and that Usagi's just a more cynical version of him.
* {{Crossover}}: The characters and setting of Usagi Yojimbo show up more than once in the series, and "Across The Universe" features Raphael in one of Peter Laird's other stories, Planet Racers.
* EarlyBirdCameo: He shows up in a flashback detailing how Drako tried to kill Splinter for defeating him, and helps Splinter.
* GratuitousJapanese: Often uses this.
* MyGreatestFailure: Regards being ForcedToWatch his master get killed in battle next to him as this.

[[/folder]]

[[folder:The Foot Clan]]
!! The Foot Clan

An ancient order of ''shinobi'', assassains and spies dating back to medieval Japan. In present day, they have semi-independent chapters all over the world, overseen by the japanese head council.

* AvengingTheVillain: The Foot are honor-bound to avenge the death of The Shredder, but agree to void the blood debt if the Turtles assist in bringing order to the New York branch.
* ConservationOfNinjitsu: Ridiculously prone to this.
* CyberNinja: The Foot Tech Ninja, which grants them invisibility.
* FacelessMooks: The rank and file ninja have virtually no defining characteristics.
* {{Ninja}}: They're generally ninjas, trained by Shredder.

!! Oroku Saki/Ch'rell/The Shredder
[[quoteright:290:http://static.tvtropes.org/pmwiki/pub/images/shredder_utom.PNG]]
[[caption-width-right:290:[[labelnote:See his real appearance]]http://static.tvtropes.org/pmwiki/pub/images/chrell_btts.PNG[[/labelnote]]]]
--> Voiced by Scottie Ray

The leader of the Foot Clan, who works on various criminal operations. He's by and large the most personal nemesis of the heroes, and the most recurring one.

* AdaptationOriginConnection: He's one of the main reasons the ship carrying him crashed on Earth, and thus ended up playing an indirect part in creating the Turtles and Splinter, his greatest enemies.
* AdaptationalBadass: He's capable of defeating the Turtles with ease, to the point they stay out of his league for a long while, in which he finally starts relying on augmented armors in fights, which help him against Splinter. He's also the one with the title that lives the longest.
* AdaptationalVillainy: While the Shredder is never a saint in any continuity, the Utrom Shredder is by far and away the most dangerous incarnation of the Shredder in the history of the entire franchise -- after all, no Shredder can ever top ''nearly destroying all of reality itself''.
* AdaptationSpeciesChange: The only incarnation of the Shredder, as far being the Shredder that the Turtles consider their ArchEnemy, who was never human.
* ArchEnemy: He's the one that has most actively attempted to murder the Turtles, being part of the reason they came into existence to begin with. When he returns in ''Turtles Forever'', his hatred for them has become so strong that he can't even stand the idea of different versions of the Turtles existing in other dimensions.
* BadBoss: His first on-screen action is murdering a Purple Dragon for failing him, and frequently maimed Baxter Stockman for his repeated failures until nothing is left of him but his brain and eye.
* BigBad: Specifically of Season 1, due to most of the criminal organizations in it being connected to him, but he still provides a lot of the action in Season 2 and 3.
* CatchPhrase: "None of you will leave here/this place alive!"
* TheComicallySerious: ''Very'' rarely. A shining example occurs in "Exodus" when Chaplin is gushing over how cool it is to learn that he's actually a grotesque brain-ish alien, Ch'rell just has a blank, unresponsive and unamused look on his face.
* CompositeCharacter: The Shredder actually being the Utrom Ch'rell in some ways makes him this series' answer to Krang, as well as Oroku Saki. While WordOfGod says they tried to keep that similarity to a minimum throughout the show's run, ''Turtles Forever'' takes the idea and runs with it when they merge Dimension X technology with Utrom technology, giving him a Molecular amplification Exosuit that can grow to skyscraper size and transform into various weapons.
* DeadPersonImpersonation: Ch'rell has replaced the real Oroku Saki. [[spoiler: Oroku Saki later turns out to be more alive than expected.]]
* TheDreaded: Even after defeating him several times, just hearing that Ch'rell is involved in something is enough to make the turtles nervous about their chances of survival.
* EstablishingCharacterMoment: His first on-screen action in the series is to ''personally execute'' a Purple Dragon who failed him.
* EvenEvilHasLovedOnes: He seems to hold genuine concern for his adoptive daughter Karai. Until she refused to let him kill the Turtles.
* EvilVsEvil: In Season 3 against Bishop.
* FatalFlaw: No matter which universe Shredder is from, the one constant is his massive ego.
* FauxAffablyEvil: Mostly in his Oroku Saki persona he employs in Season 3. His efforts to charm the mayor and the city genuinely work to hide the fact he's an omnicidal maniac.
* FlunkyBoss: This version almost always has some goons the Turtles have to fight through first before engaging him. In fact, almost every fight with him on his terms has him either using Foot ninjas to wear down the enemy before he arrives, or to distract them so he can launch surprise attacks.
* HijackedByGanon: If there's a large-scale conflict in the series, he's most likely going to take center stage by the end of it, usually resulting in a MeleeATrois.
* HumanPopsicle: He was banished to the ice asteroid belt of Mor Gal Tal at the end of "Exodus Part 2" after being found guilty by the Utrom council. And he was found frozen in ice and freed by 1987 Shredder in ''Turtles Forever''.
* {{Hypocrite}}: In ''Turtles Forever'', he complains about the 1987 Shredder using "[his] name" in vain, when Season 5 indicates that ''Ch'Rell'' used the name and title of the real Oroku Saki.
* KnowWhenToFoldEm: In "Exodus", after his spaceship is done being built, he plans on just leaving Earth to get his revenge on the Utroms, without even attempting to tie up his loose ends with the Turtles. He does, however, [[ImpliedDeathThreat hint that he'll come back]] after his business with the Utroms are finished.
* MultiLayerFacade: He's got a public identity which is Oroku Saki, the rich and well respected Japanese Businessman. Then he's the Shredder, a warlord who is using his public persona to gain power. And then his true identity originally only known by his adoptive daughter Karai is Ch'rell, an Utrom criminal who has been on Earth for over a millennium.
* OmnicidalManiac: ''Turtles Forever'', where he's willing to destroy the entire multiverse, including himself, if it meant killing all existing ninja turtles. That includes his own daughter.
* PetTheDog: Downplayed. While he can throw it away at a moments notice, he seems to have ''some'' level of affection toward his higher level lieutenants; he personally raised Karai, trained Hun, rarely ever significantly punished them, and they're the only ones he listens to. He also respected the power of the Foot Mystics, which they reciprocated to some extent, even when they thought he was an "abomination".
* PutOnABus: He gets imprisoned on an asteroid in the endgame of Season 3, and doesn't show up again aside from cameos in ''Fast Forward'' and ''Back To The Sewers'', until ''WesternAnimation/TurtlesForever''.
* ReallySevenHundredYearsOld: Due to being an alien.
* RevengeBeforeReason: He comes to hate the Turtles so much that he rather destroy them and destroy the ''entire multiverse'', including himself and his daughter Karai, than let them live.
* SpikesOfVillainy: Especially in his latter bodies.
* TinTyrant: While a few other Shredder incarnations come close (such as in the movies and the Nick cartoon), the armor and attitude of that one fit the trope better.
* WalkingSpoiler: His real identity.
* TheWorfEffect: His Season One self is easily defeated in the Season Six episode "Timing is Everything", where he travels to 2105 and gets his ass kicked by Leonardo. It's implied that these events are part of a StableTimeLoop which caused the Shredder to become more ruthless in his hunt for the turtles Post-Season One -- which would eventually lead to his final defeat. This is even indirectly referenced in ''WesternAnimation/TurtlesForever'': not once in the movie does the Utrom Shredder directly fight with any of the turtles. He either points his army and elite henchmen at them or [[spoiler:enlarges his suit AttackOfTheFiftyFootWhatever-style, giving himself an unfair advantage]].

!! Karai
[[quoteright:311:http://static.tvtropes.org/pmwiki/pub/images/2118085_karai_94456.jpg]]
-> A high-ranking member of the Foot Clan

* AmbiguouslyEvil: Until Season 4.
* AntiVillain: Rarely holds any enmity towards the turtles, fighting them on Shredder's orders.
* AvengingTheVillain: Her motivation for fighting the Turtles after they defeated Shredder.
* BadBoss: She treated the Foot Mystics more along the lines of weapons, and constantly ignored their opinions, saying that since she had the Heart of Tengu, they would do whatever they pleased. It didn't work that well in the long run.
* TheBadGuyWins: "Scion of the Shredder" has Karai seemingly killing Master Splinter and all but one of the Turtles (Leo), as well as destroying their lair. By the next episode it's revealed that they all survived, however.
* BrokenBird: In seasons 4 and 5.
* {{Co Dragon|s}}: After her introduction, she shares the role of TheDragon with Hun.
* ContrastingSequelAntagonist: In Season 4, after taking the role of The Shredder, she's much more active in hunting down and murdering the Turtles, to the point that she destroys their lair and most of their vehicles in the process, rather than being as passive as Ch'Rell. However, she lacks Ch'Rell's cunning and her hotheaded tactics cause the Foot Mystics to respect her less than her predecessor.
* CorruptCorporateExecutive: Once she takes over her father's enterprise.
* DaddysLittleVillain: She actually is the Shredder's foster daughter.
* DarkActionGirl: Can usually take any one of the turtles head to head, though not all four like Shredder frequently can.
* DemotedToDragon: Originally in the comic, Karai was a Foot Clan commander on the same level as the Shredder, sent by their mutual commanders in Japan to clean up his messes.
* DragonAscendant: In season 4. After Shredder's defeat she takes the mantle for her own.
** She reassumes her role as co-dragon in ''Turtles Forever''.
* EnigmaticMinion: Her loyalties before Season 4 were one of the most confusing and complex threads in the entire series.
* EvilCounterpart: To Leonardo.
* GoodColorsEvilColors: A very subtle one occurs in Season 4. Normally she wears pink lipstick, but for "Prodigal Son" she wears red lipstick, symbolizing her crossover into evil when she believed she's killed the Turtles. After Leo defeats her the next time we see her she's gone back to the pink lipstick, showing she's not so evil and such a threat anymore.
* HeelFaceTurn: Though it doesn't happens until season 5.
** Which extends to HeelFaceRevolvingDoor when she switches sides twice in ''Turtles Forever'' where the Shredder return now as an OmnicidalManiac. This proves to be too much for her, and she sides with the turtles against him.
* HoldingHands: Karai does this to Chaplin at the end of Season Five.
* HonorBeforeReason
* HookedUpAfterwards: Karai and Chaplin, after the season 5 finale hand-holding.
* LadyOfWar
* {{Leitmotif}}
* MyMasterRightOrWrong: This is the struggle that Karai faces in the second and third seasons whit her loyalty to her adoptive father, The Shredder, clashes with her more noble instincts. One of the forms this clash takes is in her reluctance to kill the turtles, who had agreed to help her restore the New York Foot in exchange for ending the syndicate's vendetta against the turtles. While the agreement was made under false pretenses—it was made under the assumption that the Shredder was dead and that Karai would be leading the Foot, which Karai knew was not the case—she still felt compelled to keep it, despite her father's wishes.
* NoYou: Karai's not very good at trash-talking. She does this several times to the Tengu Shredder.
* RedEyesTakeWarning
* ShouldersOfDoom: As Shredder.
* SpikesOfDoom: As Shredder.
* TinTyrant: When she takes over the Shredder's mantle.
* TookALevelInJerkass: In Season Four, after the exile of Ch'rell. She gets better in Season Five and only antagonizes the Turtles again when the Utrom Shredder returns in ''WesternAnimation/TurtlesForever''. [[spoiler:After he goes absolutely insane and tries to destroy TheMultiverse in his vendetta against all Teenage Mutant Ninja Turtles, she makes a permanent HeelFaceTurn and tries to stop him]].
* {{Tykebomb}}: An orphan found and adopted by the Shredder at an early age, he turned her into one of his most loyal and capable lieutenants. The Shredder, surprisingly enough, turns out to be a rather good parent (at least from her account) and the ensuing loyalty she feels to him is at the core of her character arc.
* UndyingLoyalty: This is what prevents her to make a HeelFaceTurn for most of the series; She genuinely respects the Turtles, almost has a friendship with Leonardo and knows to some extent that the Shredder's motives aren't exactly pure, but due to the role he played in her life, she feels like she owes him, and stays by his side no matter what. Even when he actually is defeated, she ends up blaming the turtles for it and going on a RoaringRampageOfRevenge against them. Eventually, it takes [[spoiler:the Shredder trying to destroy TheMultiverse (him and her included)]] to make her leave him once and for all.
* VillainWithGoodPublicity
* WildCard
* WorthyOpponent: To the Turtles in general, but typically to Leo.

!!Shredder Mutants
--> Hideously mutated clones of The Shredder, dressed in modified Shredder armor and trained to work as elite Foot soldiers.
* AdaptationInducedPlotHole: Due to the reveal that the Shredder in this series is an Utrom, why he has distinctly ''humanoid'' clones is never adequately explained.
* BigThinShortTrio: Shiva-Shredder is huge and hulking, Claws is thin and lean and Shrimp is short.
* BodyHorror
* FragileSpeedster: Owing to his size, Shrimp is incredibly fast, but not as strong as the others.
* LeanAndMean: Claws is notably slimmer than his "brothers".
* MultiArmedAndDangerous: Shiva-Shredder has four arms, each equipped with shredder claws.

!!Foot Elite
--> Elite ninjas of the Foot and the Shredders personal body guards and lieutenants.

* AvengingTheVillain: After the Shredders death at the hands of the Turtles, the remaining Elites swear a vendetta against both them, and the factions of the Foot now fighting for control over New York.
* ADayInTheLimelight: They got a little more focus in the "City at War" arc as they try to regain control of the city for themselves.
* TheDreaded: Becomes this to Leonardo after the savage beatdown he recieves at their hands. They are not present in the comic book version of the storyline.
* EliteMook: They serve as the absolute best fighters of the Foot, second only to Shredder himself.
* EnemyCivilWar: They strike at all parties involved in the war over the New York underworld, including the Japanese Foot.
* FlatCharacter: None of them really have any character traits beyond their blind loyalty to the Shredder. In the cartoon each Elite has a unique weapon, an axe, a spear, a poleaxe and a doublebladed sword, but thats about it.
* UncertainDoom: In the fifth season, they're taken down by the Tengu Shredder and are never seen again, not even during ''Fast Forward'' or ''Back To the Sewers''. Whether they died or not is never adequately answered.

!! Dr. Chaplin
-> A young scientist who becomes the head of the Foot's science department in season 3.

* AmazonChaser: A look at his Amazon Blade Bots makes it clear that a large part of his crush on Karai rests on her ability to kick ass.
* TheBusCameBack: After being absent in Season 4, he returns in Season 5 as Karai's lieutenant.
* TheDragon: Karai's lieutenant in Season 5.
* ImprobableAge: Although the art style makes it somewhat hard to determine just how old he is, the various comments made about it suggest that he is either a teen or barely in his twenties when he debuts, which makes him a rather young for a doctor and way too young for a department head.
* MythologyGag: He looks like the [[WesternAnimation/TeenageMutantNinjaTurtles1987 1987]] human Baxter Stockman, sharing the same wardrobe, with the only difference being his hair color being red, but that's derived from Baxter's eventual mutation into a fly.
* PunchClockVillain: He's not evil at all, just on the wrong side and loyal to Karai.

!! Khan
-> A highly skilled Foot Ninja who tries to bring the Clan back to its former glory in season 7, and who becomes Cyber Shredder's agent in the real world.

* AnimalMotif: The dragon—fitting, since he's also TheDragon
* ConvenientReplacementCharacter: Essentially only introduced in ''Back to the Sewers'' to replace Karai as the acting leader of the Foot, since it's heavily implied that she left with Chaplin after the season 5 finale
* TheDragon: To Cyber Shredder.
* EvilMentor: He is first seen running a martial arts school, whose students include Casey.
* FlatCharacter: He doesn't serve much purpose besides being the Shredder's right-hand man.
* UndyingLoyalty: Even after the Foot essentially dissolved after Season 5, he still trained ninjas to prepare for the return of the Shredder.
[[/folder]]

[[folder: Purple Dragon]]
!!Purple Dragons

A New York street gang consisting of mostly teenage thugs, thieves and killers.

* AscendedExtra: Like the Shredder, the Purple Dragons were one-shot characters that appeared in the very first issue of the comic book, though unlike the Shredder, it would be decades before they became a permanent part of the Turtles rogue's gallery.
* StarterVillain: The very first opponents the Turtles fought.

!! Hun

Real name: Hunter Mason. A hulking, tattooed gangster who serves as the leader of the Purple Dragons street gang.

* {{Animorphism}}: [[spoiler: To a mutant turtle, in ''Turtles Forever''.]]
* ArchEnemy: To Casey in most continuities. He killed Casey's father.
* AuthorityEqualsAsskicking: One of the two constants about him is that he always is the leader of the Purple Dragons, and the strongest in the gang.
* BadassLongcoat: At one point.
* BadassNormal: A regular human with no mutation whatsoever, but still capable of giving a hard time to the Turtles of his own.
* BerserkButton: Unless you want Hun to rudely tell you to leave him alone, do not persist with him that he placed an order. The result? --->'''Hun''': (Growling) "GO AWAY! WE! PLACED! NO! ORDER!"
* BreakoutVillain: He was originally created as just muscle for the Foot, but ended up well-liked for his surprising amounts of characterization, landing him not just more story prominence, both as an enforcer and [[BigBadEnsemble one of the antagonists]] of Season 4, but eventually [[CanonImmigrant became part of the original Mirage comics]], and a franchise mainstay.
* TheBrute: He is not ''stupid'', but still, he is the Shredder's biggest and strongest enforcer.
* CanonImmigrant: He was originally created for the 4Kids show, but got popular enough to be adapted back into the comics, and later introduced (though [[InNameOnly considerably different]]) in the Nickelodeon cartoon.
* {{Catchphrase}}: [[ThisIsGonnaSuck "Oh, crud"]]
* CharacterDevelopment: While initially [[UndyingLoyalty very loyal]] to the Shredder, after learning about him being an alien, he leaves the Foot Clan and sheds a lot of his brute tendencies to turn the Purple Dragons from a petty gang of thugs into a lucrative crime organization, pulling off very successful heists in the process.
* TheDragon: To Shredder, though he eventually becoming {{Co Dragon|s}} alongside Karai.
* DragonAscendant: When Hun finds out Oroku Saki is actually an alien named Ch'rell he leaves The Foot Clan, and does a complete makeover of The Purple Dragons, transforming them from simple street thugs into a veritable army that pulls off some very high risk & high reward theft jobs from Multinational Corporations & even the military.
** However come ''Turtles Forever'' after he gets mutated into Slash he willingly decides to get DemotedToDragon & serve Ch'rell once again.
* EmpoweredBadassNormal: [[spoiler:In ''Turtles Forever''.]]
* FatBastard: Subverted as he's all muscle, but he occasionally gets jokes to this end from the Turtles.
* FingerlessGloves:
* GuiltyPleasures: In-show variation with Hun. Running the Purple Dragons is one thing, but who would've thought he [[spoiler:plays the same MMORPG that Mikey does?]] Not to mention he, unknowingly, [[spoiler:met the Turtles in it and helped them get Splinter's data bits.]]
* KarmicTransformation: In ''Turtles Forever'', [[spoiler:he ends up mutated into a Slash-esque Turtle after being in contact with both 2003 Raph and the old cartoon's Mutagen. [[YouAreWhatYouHate To say he doesn't take it well would be quite an understatement.]]]]
* LargeAndInCharge: A tremendous mountain of a man who's stated to weigh in excess of 500 lbs and the leader of the Purple Dragons.
* {{Leitmotif}}: A deep, sinister guitar riff.
* LightningBruiser: Don't let his size fool you, Hun is astonishingly fast--more than fast enough to be a match for the turtles.
* MostGamersAreMale: Size doesn't seem to matter for him.
* PunctuatedForEmphasis: Is it any surprise that Hun has at least one moment of this? Hun: "Arrrrrgh! Go away! WE! PLACED! NO! ORDER!"
* ScarsAreForever: Hun sports a trio of matching scars on his face, courtesy of a pre-mutation Splinter.
* TattooedCrook: Hhe sports twin tattoos of the Foot and Purple Dragon symbols, removing the former after he leaves the organization for good.
* TookALevelInBadass: In Season 4, Hun transforms the Purple Dragons from a petty street gang working for the Foot into a far more sophisticated organization operating on its own.
* WouldHitAGirl: He was willing to hit April, hoping that losing her would cause the turtles to lose their fighting spirit. In ''City At War, Part 3'', Hun smacks Karai around with a '''support beam'''.

[[/folder]]

[[folder: Superheroes and supervillains]]
!! Baxter Stockman

An African-American {{Mad scientist}} and creator of the mouser robots.While he sold them off as a means to rid the city of the rat problem, he was really using them to rob banks while under the Utrom Shredder's employ.

* AnArmAndALeg: ...and an eye, and another arm and another leg and so forth...until he's reduced to a literal BrainInAJar .
* AntiVillain: Eventually.
* AscendedExtra: He's a rather minor antagonist in most major ''TMNT'' incarnations, but ends up being one of the most recurring and plot-critical villains as the series goes on.
* BackFromTheDead: In "Insane in the Membrane", Stockman dies when his new human body plummets helplessly into the river. A few episodes later, Bishop revives him, as he still needs his brain for his work.
* BadBoss: He fully intended to murder April when she discovered the Mousers' true purpose. Sure, he's almost never in a position of authority again in the series, but this is pretty bad, and it is a small piece of a character so generally unlikeable that him being increasingly mutilated over the series' run (ironically as punishment for repeatedly failing the Shredder) elicits little in the way of sympathy.
* BigBadWannabe: He really seems to want to be taken seriously as a criminal mastermind, but never manages to get very far in the process.
* BlackAndNerdy
* BodyHorror: In "Insane in the Membrane," after four seasons of losing body parts, Baxter Stockman finally obtains a new body via cloning. Soon enough, however, he discovers that it's unstable, as his limbs start deteriorating and melting off. His mind had gone with it before being retrieved and placed back in his jar.
* BrainInAJar: By mid-season 2, his punishments from the Shredder and Hun have become so severe that he's been reduced to this, and he stays this way for the rest of the series. After his HeelFaceTurn in "Fast Forward", Bishop implies that getting him a new human body will be easy.
* BreakTheHaughty: Pretty much his ''entire career'' is this, but "Insane In The Membrane" is where it really sinks in.
* ChronicBackstabbingDisorder: He frequently attempted to sabotage the people working with him, generally to make himself look better, or because he wanted revenge. He cuts it out after being hired by Agent Bishop, for the most part.
* CloneDegeneration: Within a week, Stockman's new human body deteriorates.
* CorruptCorporateExecutive: He was one before his body kept getting destroyed.
* {{Determinator}}: He ''never'' seems to lose his smug edge or ability to concoct new schemes, no matter ''how many limbs get cut off.'' [[MontyPythonAndTheHolyGrail The Black Knight]] would be impressed.
* EvilIsHammy: Especially when he loses his sanity in "Insane in the Membrane".
* EvilMentor: For April.
* {{Fingore}}: Occurs to him in "Insane in the Membrane."
* FourEyesZeroSoul: In most continuities, he wears glasses.
* HeelFaceTurn: Is eventually convinced to repent in "Fast Forward" and joins the reformed Bishop.
* HoistByHisOwnPetard: In "Return to New York".
* {{Hypocrite}}: He calls mutants like the turtles "stupid freaks." This coming from a talking head in a robot body. This version is notoriously vain, so it fits him perfectly.
* IJustWantToBeNormal: He desperately wants to be restored to a human form.
* ImplacableMan: Lampshaded by Leonardo and Shredder:
-->'''Leonardo''': What do we have to do, to stop this guy?
-->'''Shredder''': I have asked myself that question many times.
* {{Irony}}: Interestingly, in the original TV Show, he ended up getting a FateWorseThanDeath, in a LighterAndSofter show, while in this darker show, not really mattering since ''Fast Forward'' still had Dark elements, Baxter gets a somewhat happier ending
* {{Leitmotif}}
* MadScientist
* OmnidisciplinaryScientist: His primary field is usually robotics, evidenced by his famous Mousers, but he'll show expertise in everything from genetics to archaeology as suits the plot.
* PoweredArmor: Occasionally wear these.
* SerialProstheses: Thanks to the Shredder's attitude towards failure. He loses an eye, a hand, and ends up in a wheelchair before trying to take his revenge in a MiniMecha. When that fails, he's reduced to a head attached to a robot. It gets worse from there.
* ScarsAreForever
* TheStarscream: To the Shredder.
* SparedByTheAdaptation: Downplayed horribly. He doesn't die... But he really wishes he had.
* ThirdPersonPerson: He is prone to this when gloating.
* UsedToBeASweetKid: He used to be a fairly benevolent and principled scientist too until his ego and arrogance got the better of him.
* WasOnceAMan: He ''never'' stays human.
* WeCanRebuildHim: Every time he takes a beating that would kill a normal human, the Foot simply rebuild him. When he actually does die, Bishop has him brought back.
* WetwareCPU: As loses more and more of his body, Baxter begins becoming this.
* YankTheDogsChain: "Insane in the Membrane" for him.

!! The Slayer / The Rat King

A man dressed up in rags and bandages who shares a rapport with rats.

* AbortedArc: His episode ending, which clearly indicated he was going to return, but it never happened. Closest he ever came to returning was watching April and Casey's wedding in the final episode.
* AdaptationalEarlyAppearance: Inverted. His first appearance, "Bishop's Gambit", doesn't occur until Season 3, late in the series, and doesn't don the Rat King identity until "I, Monster", a Season ''4'' episode. Due to this, he doesn't play any role in the City At War arc.
* AxCrazy: After becoming the Rat King.
* BeastMan: As the Rat King.
* CanonCharacterAllAlong: The Slayer that he originally was appears to just be another one of Bishop's one-off experiments, but ends up becoming The Rat King.
* ComicBookMoviesDontUseCodenames: He is never referred as "Rat King".
* HealingFactor: As The Slayer.
* {{Invisibility}}: As The Slayer.
* MindControl: Subverted. It is never said how he controls rats, but presumably it is related to his being formed from mutated rat (Splinter's) DNA.
* MixAndMatchMan: He is one of these, using DNA from Bishop, Splinter, among other possible sources.
* SparedByTheAdaptation: He was KilledOffForReal in the Mirage Comics, which the show is more closely based on, but lives in this version.
* SuperSoldier: His Slayer persona was designed to be one. He is a prototype bio-mechanical super soldier created by Agent Bishop using genetically manipulated, alien, the turtles, his own and Splinter's DNA.

!! Silver Sentry
-> One of Michelangelo's superhero idols and the leader of the modern-day Justice Force.

* CaptainErsatz: Of Superman.
* ChestInsignia: A stylized bird—probably.
* FlyingBrick
* SuperToughness
* XrayVision

!! Tsunami
-> A hydrokinetic super-hero from Japan who joins the Justice Force in season 3.

* BatmanCanBreatheInSpace
* MakingASplash:
* RecurringExtra:

!! Chrysalis
-> An psychokinetic super-hero from India who joins the Justice Force in season 3.

* BatmanCanBreatheInSpace
* MindOverMatter
* PowerGivesYouWings
* RecurringExtra
* ThirdEye

!! Nano
-> A sentient nanomachine colony who escapes its creators and causes trouble.

* AntiVillain: It either has the mindset of a child or is being controlled by outside forces; either way, it is rarely entirely responsible for its actions.
* CrushKillDestroy
* DragonInChief: His former Boss and "Father" Harry is an average human.
* HeelFaceTurn: In season 5.
* IJustWantToBeLoved: It views itself as a child who wants to be loved by its "mother", the doctor who created it, and its "father", Harry the con artist.
* InstantAIJustAddWater: For unexplained reason, the nano-machine colony started personifying, to its creator's chagrin.
* NanoMachines
* ObliviouslyEvil
* SelfDuplication
* TragicVillain: Sure, it caused destruction almost everywhere it went, but its supposed death scenes are rather disheartening.

!! Green Mantle
-> Green Lantern if Green Lantern got his powers from a cape.

* CaptainErsatz: Of Green Lantern, specifically Hal Jordan.
* ClothesMakeTheSuperman
* LanternJawOfJustice

!! Turtle Titan II
-> A man who takes on Michelangelo's old super-heroic identity.

* AnimalThemedSuperbeing
* IdenticalGrandson: Of Silver Sentry.
* {{Jetpack}}: How he flies.
* LegacyCharacter: A twofer, continuing the legacies of both Michelangelo and Silver Sentry.

!! Dr. Malignus
-> Silver Sentry's arch-enemy, who uses his engineering prowess to commit super-crime.

* DrGenericius
* {{Hypno Trinket}}s: The mind-control bugs he uses in his debut activity.
* MadScientist
* MorallyAmbiguousDoctorate
* TheBusCameBack: He made just one appearance in the first season during Michelangelo's teamup episode with Silver Sentry and remains absent for the remainder of the series(aside from appearing in a story told by Michelangelo during Fast Forward) until the seventh and final season where he makes one more official appearance.
[[/folder]]

[[folder:The Battle Nexus]]

!! The Ultimate Ninja

A warrior who comes to Earth to challenge Leo to mortal combat.

* AllThereInTheScript: Concept materials call him "Ue-Sama".
* AntagonisticOffspring: The son of the Daimyo.
* ArtificialLimbs: Specifically, his left hand.
* EveryoneCallsHimBarkeep: This guy is never identified by name, except as Drako when he merges with him in the third season.
* FusionDance: With Drako during the third season.
* MeaningfulRename: “The Ultimate Ninja” is what he calls himself after he believe he's defeated Leonardo.
* SoreLoser: Attempts to kill Leonardo after being officially defeated.
* TakenForGranite / LiterallyShatteredLives: This is how he initially dies after "Same As It Never Was" and "The Real World", but he's brought back to life as a child; Drako stays dead.
* PartyScattering: He and Drako as Ultimate Drako are the ones responsible for sending Donatello to the infamous "[[Recap/TeenageMutantNinjaTurtles2003S3E21SameAsItNeverWas Same As It Never Was]]" universe with the Shredder ruling all, while Leo winds with Usagi Yojimbo.
* RaiseHimRightThisTime: After he is killed Lord Simultaneous revives him as a child. It's implied the Daimyo will do this.
* TheUnfavorite
* WalkingArmory: Swords, WolverineClaws, chain and sickle, shuriken, blinding dust—the works.

!! The Daimyo

Ruler of the Battle Nexus and The Ultimate Ninja's father.

* EveryoneCallsHimBarkeep: His true name is never identified.
* TheGoodKing
* LongLived
* OldMaster
* SanitySlippage: In the third season, it is clear he has ''not'' taken the loss of his son very well.

!! Drako

A Battle Nexus Championship contestant who was defeated by Splinter years ago.

* ArcVillain: For the Battle Nexus arc.
* ADogNamedDog: He's a red dragon named Drako.
* FusionDance: Merges with the Daimyo's son in Season 3.
* HateSink: Blatantly cheats, betrays everyone who works with him, and [[JerkAss is generally antagonistic]] toward everyone. Lord Simultaneous [[AssholeVictim doesn't even bring him back]] after bringing the Ultimate Ninja back.
* KilledOffForReal: Petrified and destroyed two episodes after scattering the clan.
* PartyScattering: He and the Ultimate Ninja as Ultimate Drako are the ones responsible for sending Donatello to the infamous "[[Recap/TeenageMutantNinjaTurtles2003S3E21SameAsItNeverWas Same As It Never Was]]" universe with the Shredder ruling all, while Leo winds with Usagi Yojimbo.
* SoreLoser: Attempts to have Splinter killed after having lost the Battle Nexus Tournament.
* TakenForGranite / LiterallyShatteredLives: This is how Drako finally meets his end after he scatters the Hamato Clan (one of whom, Donatello, gets to witness what will happen should main BigBad Ch'rell/The Shredder prevail) and is confronted for it. The Ultimate Ninja is brought back to life, but Drako isn't.

!! Kluh

A Battle Nexus Championship contestant with an animus towards Michelangelo.

* AmbiguouslyEvil: While he eventually tries to kill Michelangelo for purely selfish reasons, he also formed part of Traximus' rebel army, which makes it rather hard to get a sense of him.
* SdrawkcabName: The character is meant to be a homage to TheHulk.
* SoreLoser: Although he has a point about only losing on a technicality, it eventually becomes clear that he doesn't really give a damn about the Battle Nexus Championship or its rules.
* SuperMode: Inverted, more or less, as he spends way more time in his hulked-out form than he does in his smaller state.
[[/folder]]

[[folder:The Ninja Tribunal Arc]]

!! The Ancient One

Hamato Yoshi's adoptive parent and, for a time, Leonardo's sensei.

* {{Acrofatic}}: Much wider than he is tall, but able to kick ass with the best of them.
* BackForTheFinale: He's one of the guests at Casey and April's wedding and takes part in the ensuing battle against the Cyber Shredder.
* BigGood: Shares the role with Splinter in the fifth season after the [[spoiler:apparent deaths of the Tribunal.]]
* GassHole: Early on, he teaches Leo a lesson on how he can't win all his battles by getting him pit against some [[UnwinnableByDesign near invincible]] warriors. How did the Ancient One put through Leonardo through this lesson? By farting and alerting said warriors to their presence.
* MyGreatestFailure: He blames himself for not doing anything about the darkness in Mashimi's heart before his murder of Tang Shen.
* ObfuscatingStupidity: Once Leonardo learns of his true nature, he drops the crazy mentor facade, though he remains fairly whimsical until the fifth season.
* OldMaster: An elderly ninja master.
* OnlyKnownByTheirNickname: Only ever known as the "Ancient One". Amusingly, the Tribunal calls him "Young One."
* ReasonableAuthorityFigure: Leonardo and Michelangelo even wish they could be studying under him over the rough Tribunal.
* TricksterMentor: At first.

!! The Ninja Tribunal

A quartet of long-lived ninja masters who have made it their lives mission to stop the Demon Shredder. Their names are Kon, Juto, Chikara, and Hisomi.

* AmazonianBeauty : Chikara. Adam certainly thinks so.
* BigGood: In early Season 5.
* {{The Chessmaster}}s: Played a really long game in preparation for the final defeat of the Tengu Shredder.
* ColorCodedCharacters: Hisomi is yellow/gold. Chikara is green. Juto is blue. Kon is white.
* DisneyDeath: They are only revealed to have survived in the ending of the season finale.
* GoodIsNotNice: They're the chief leaders of the opposition to the Tengu Shredder, but they're almost complete assholes in doing so.
* MeaningfulName: Chikara's name is the Japanese word for "Power". Her specialty is physical strength.
* {{Physical God}}s: Became this through years of training.
* TheOmniscientCouncilOfVagueness: Initially, anyway.
* {{Sacrificial Lion}}s: Their apparent deaths force the Turtles to confront the Tengu Shredder on their own.
* TheSmurfettePrinciple: Chikara is the only female member.
* TokenGoodTeammate: While Hisomi is still kind of a jerk, he's much more constructive and helpful as opposed to the other members, who tend to berate the students even when they do something correct.
* WhatTheHellHero: This is how Splinter (and the audience) react when the Ninja Tribunal refused to do anything about the Utrom Shredder, even allowing him to kill Master Yoshi. Justified when it's revealed that without Yoshi's death, Splinter and the turtles wouldn't have been mutated, something Don lampshaded 3 seasons ago in the ClipShow episode.

!! The Acolytes

Four martial artists who were kidnapped along with the turtles to serve as the Ninja Tribunal's apprentices. Their names are Faraji Ngala, Joi Reynard, Adam [=McKay=], and Tora Yoshida

* BackForTheFinale: They're guests at Casey and April's wedding, and fight against the Cyber Shredder.
* OvershadowedByAwesome:
* {{Sacrificial Lion}}s: They eventually come back, but their “deaths” serve this purpose.
* {{Satellite Character}}s: Each acolyte establishes a rapport with a particular turtle, whom they revolve around—Faraji befriends Leo, Joi bonds with Raph, etc.
* TheSmurfettePrinciple: Joi is the only girl of the Acolytes.

!! The Tengu Shredder/Oroku Saki
--> Voiced by: Scottie Ray

The original Shredder, namesake of Ch'Rell's identity, and the antagonist of Season 5.

* BerserkButton: Doesn't take kindly to the Mystics suggesting he should kill Karai, stating he does whatever he pleases.
* BigBad: For Season 5.
* ContrastingSequelAntagonist: He's much less subtle and more active in his pursuits to kill his opposition, and doesn't have a goal involving getting back to his home planet or getting revenge; he just wants to TakeOverTheWorld. He also lacks the personal enmity the previous Shredders had with the Turtles, and thus frequently underestimates them.
* DealWithTheDevil: In exchange for sparing the Tengu's life, Saki merge with him and gain unspeakable power.
* DivergentCharacterEvolution: When he cameod in ''Back To The Sewers'', he looked much more top-heavy and the cover for his arms looked more like black bandages, along with having a much "pointier" aesthetic, presumably to further distinguish himself from Ch'Rell's overall look.
* ForTheEvulz: Most of his actions are caused by a love of spreading fear and destruction.
* FusionDance: Both Saki and the Tengu merge together.
* GreaterScopeVillain: The inspiration for Ch'Rell's identity and the true master of the Foot Mystics, whose goal is to resurrect him. He doesn't come into action until the second half in Season 5.
* HijackedByGanon: Downplayed; while he's not the same as Ch'Rell, the conflict of Season 5 is against the one with the original Shredder title.
* LovesTheSoundOfScreaming: Admits he can't wait to hear the screams when he remakes the world in his image.
* OneWingedAngel: He can transform into large dragon when more strength is needed.

!! The Shredder's Heralds / Foot Mystics

The Demon Shredder's heralds, who had been forced to serve the Utrom Shredder until they engineered their freedom.

* AscendedExtra: They were one-off villains for the penultimate arc of the first season, and voiceless. They return early in the fourth season, and nearly mentally break the Turtles, discover the location of their lair, and facilitate a plot that leads to the return of the Tengu Shredder, becoming the {{Big Bad}}s for the first half of the fifth season before returning to their role as his Dragons.
* BigBad: For the first half of the fifth season.
* BecauseYouWereNiceToMe: A non-romantic example; though they deem Ch'Rell an "Utrom abomination", they appreciated his large amount of respect for their powers when they served him, in comparison to his daughter, who cares less what they think.
* ElementalPowers: Fire, Water, Wind, Earth, and Metal.
* {{The Dragon}}s: For the demon Shredder
* GiantSpaceFleaFromNowhere: Their first appearance is almost abrupt, with the Turtles suddenly finding themselves fighting against explicitly supernatural enemies. Lessens later on as we learn the Utrom Shredder acquired their seal at some point.
* RevengeBeforeReason: Despite their loyalty to the demon Shredder, they are obsessed with getting revenge on Karai. They question him why he isn't concern to punish Karai for using his name, he tells them he's cares more about ruling the world. Though they don't wish to deter their master with his plans, this does not sit well with them. They also fume over the Shredder's lack of action when the Turtles and their allies attack their fortress.
* UndyingLoyalty: To the Demon Shredder.
* VoluntaryShapeshifting: They can take on other forms besides their default two.
* YouHaveOutlivedYourUsefulness: Demon Shredder let them get killed.

[[/folder]]

[[folder:Fast Foward]]

!! Cody Jones

Casey and April's great-grandson and heir to both O'Neil Tech and the Jones fortune.

* AscendedFanboy: Grew up reading April and Casey's journals about the turtles. The entire Fast Forward season started because he made a device to watch their adventures through time and accidentally yanked them into the future.
* TheCameo: He briefly [[BackForTheFinale appears in the finale]], watching the wedding of his great-grandparents through the Time Window.
* CharacterDevelopment: He grows up, learns to care for himself, and realizes the monster that his uncle is.
* ConvenientlyAnOrphan: Both of his parents are dead and his only relative is his [[ObviouslyEvil Obviously]] EvilUncle.
* GadgeteerGenius: Invented TimeTravel. By accident.
* LonelyRichKid: The only people in his life before the Turtles and Splinter came to the future were his robot butler and EvilUncle, so he's thrilled to have his personal heroes crash at his penthouse.
* NonIdleRich: To Serling's dismay.
* SignificantGreenEyedRedhead: Well, obviously since he's April and Casey's future great-grandson.
* TagalongKid: Before he learns to become a competent fighter.
* TeenGenius: An intellect on par with Donnie's.

!! Serling

Cody's robotic caretaker, who only barely tolerates the turtles.

* ArmCannon: As Turtle X Mark II
* BacktoBackBadasses: With Splinter in "Bad Blood".
* BadassBoast: During the DarkestHour of Dunn's attack in "Turtle X-tinction."
-->'''Serling''': It will be a cold day in ''Hades'' before I allow you [Cody] to come to harm!
* BattleButler: He was no slouch in fighting beforehand, but becomes the new Turtle X armor late into the sixth season.
* BerserkButton: Messing with Cody. Dun learned this the hard way.
* CharacterDevelopment: Eventually stops being so uptight and learns to be more flexible, and forges a strong friendship with the Turtles, and comes to terms with the fact he can't protect Cody from everything.
* DisneyDeath: See Heroic Sacrifice.
* FishOutOfTemporalWater: In the seventh season. He ends up being sent back into the 21st century by Viral, and doesn't entirely enjoy the experience, though WordOfGod says he ended up thinking his stay was worth it when he got to witness the wedding of Casey and April.
* HeroicSacrifice: Pulls one in "Turtle X-Tinction".
* MiniMecha: As Turtle X Mark II
* OddFriendship: With Splinter, the only member of the 2000's cast who doesn't harass or mock him.
* [[RobotMaid Robot Butler]]
* TakeAThirdOption: Initially he would prefer that Cody never see combat, but after Dunn goes rogue, Serling becomes the Turtle-X Mark II so Cody can still go into battle, but Serling can still protect him as well.
* TransformingMecha: As Turtle X Mark II
* TrueCompanions: He may dislike the Turtles, but he gets along very well with Master Splinter, and later Donatello.
* UndyingLoyalty: To Cody, becoming Turtle X Mark II to better protect him.
* WhatHappenedToTheMouse: At the end of the series, he's still in the present day, but is nowhere to be seen in ''Turtles Forever''.

!! Darius Dun

Cody's uncle and legal guardian, he uses his position as the C.E.O. of O'Neil Tech to facilitate various shady dealings.

* BerserkButton: Cody says he hates being called "fatty."
* BigBad: Shares the role with Sh'Okanabo for the sixth season.
* CanonImmigrant: He is introduced into [[ComicBook/TeenageMutantNinjaTurtlesIDW the IDW comics]], a whopping decade after his debut in ''Fast Forward''.
* CorruptCorporateExecutive: Runs a weapons cartel under Cody's nose and deals with criminals like Boss Zuko.
* EvilUncle: Only using his nephew for his own monetary gain.
* FatBastard: He's gigantic and obese, likely from a lifetime of nothing but a fat salary and lavish treatment.
* HighClassGlass: Wears a monocle.
* IllegalGuardian: He's Cody's legal guardian, but he's a dangerous criminal.
* KnightOfCerebus: By virtue of being Cody's EvilUncle, he has a far more personal effect on the heroes when he finally does get outed and nearly kills Cody and Serling.
* ManipulativeBastard: As Cody is too young to understand how the company works, he basically can get whatever he wants done if he explains it to Cody in simple terms. He also plays his nephew and the police like a fiddle.
* ParentalSubstitute: Is Cody's main figure of authority until he goes rogue.
* SpellMyNameWithAnS:
* TookALevelInJerkass: One of Serling's home movies was of him affably ruffling a younger Cody's hair, implying at some point in the past he actually was a good uncle to him.
* VillainWithGoodPublicity: He starts out this way at the beginning of his arc.
* WhatHappenedToTheMouse: Thanks to the AbortedArc of the Fast Forward season, his final fate was never revealed.
* YouMonster: Splinter is ''repulsed'' by him.
-->'''Splinter''': I have met many monsters in my time, Dunn, but it takes a ''special breed'' to direct such bile and hatred against a child!

!! Sh'Okanabo

An alien invader who has determined that Earth is the ideal planet for him to spread his gene-seed.

* ArcVillain: Of ''Fast Forward''.
* BackForTheFinale: After his own Time Window goes haywire, he disappears until the penultimate (though for all effects the final) episode of Fast Forward.
* BigBadEnsemble: With Darius Dun.
** BigBadDuumvirate: He later forms one with Darius Dun for the first half of Fast Forward.
* {{Expy}}: He shares more than a few similarities to [[TeenageMutantNinjaTurtles1987 Lord Dregg]].
* KarmaHoudini: He tricked Torbin Zixx into smuggling a bomb onto a spacecraft and while Zixx did rat him out to the turtles, who in turn reported it to Bishop, Sh'Okanabo never got in trouble for almost hurting many innocent beings.
* KnightOfCerebus: Episodes that feature him as the main antagonist are far more serious with larger ramifications.
* KilledOffForReal: Destroyed by a light grenade from Donnie and Raph.
* LightIsGood[=/=]DarkIsEvil: He looks dark and works in the shadows, is never seen walking around in daylight, if weak enough, sunlight can hurt him and he was killed by a solar grenade.
* SpikesOfVillainy: Especially in his first form.
* TheVirus: Anyone infected with his gene seeds becomes a Kanabo drone subservient to him.
* VoluntaryShapeshifting

!! Constable Aloysius Biggles

A robot who serves as an officer of the New New York Peacekeepers and who keeps running into the turtles.

* [[UsefulNotes/BritishCoppers British Copper]]: In intent if not in reality.
* ButtMonkey: To the point that the main gag of a preview of an episode revolved around his really long fall from a skyscraper, and Michelangelo finally admits at the end of the promo that someone should probably save him. Funnily enough, in the episode proper this is not played for laughs.
* {{Catchphrase}}: “'Allo 'Allo 'Allo. Wot's all this then?”
* InspectorJavert: Occasionally, most notably in “Playtime's Over”
* {{Ridiculously Human Robot}}: Despite being presumably programmed for the job, he rather dislikes the paperwork it involves.

!! Viral

An A.I. who serves under Sh'Okanabo.

* CyberCyclops: In her corporeal form, anyway.
* TheDragon: Was Sh'Okanabo's lieutenant during his arc.
** DragonTheirFeet[=/=]DragonAscendant: She returned to menace the Turtles again in the first episode of the ''Back to the Sewer'' season, then became the Cyber-Shredder, who was the BigBad of that season.
* DigitizedHacker
* FishOutOfTemporalWater: She gets stuck in the twenty-first century at the beginning of season 7.
* ShapeshifterWeapon: Her corporeal form is based on a shape-shifting training bot, whose limbs can turn into things like chainsaws.

!! Starlee Hambrath

An O'Neil Tech intern and friend of Cody Jones.

* ADayInTheLimelight: "Enter the Jammerhead"'s main subplot revolves around her and her family coming to visit.
* {{Adorkable}}: When she's flirting with Cody and fawning over him.
* [[GreenSkinnedSpaceBabe Blue-Skinned Space Babe]]: Complete with a TrueBlueFemininity appearance.
* FatGirl: PlayedForLaughs when her mother sees her for the first time in a while and asks if she's put on weight, when Starlee is slender.
* FullNameUltimatum: Pulls one on Cody Augustus Jones when pretending to be mad over him ditching her in the mall.
* InterspeciesRomance: Clearly wants this with Cody as "Playtime's Over" revealed, and soon enough it seems they are dating.
* NiceGirl: A sweet girl who's loyal to Cody and the gang.
* RollerbladeGood: Always seen on roller blades.
* RubberForeheadAlien: {{Pointy ears}}, blue skin, and large eyes differentiate her from standard humans.
* ShipTease: In "Playtime's Over", she manages to swindle Cody into a date and is happily attached to his arm, batting her eyes and giggling.
* SingleWomanSeeksGoodMan: She falls for Cody harder when she sees him run off to save the Turtles.
* TeenGenius: Cody's age and just as smart.

!! Jammerhead

A cyborg who runs the Street Phantoms, a New York gang.

* CanonImmigrant: Later is introduced in the IDW comic series about a decade after "Fast Forward".
* CompressedHair: His hair is completely obscured by his hood despite the fact that it's several feet high.
* {{Cyborg}}
* IntangibleMan: Like all members of the Street Phantoms, thanks to their phasing tachnology.
* SlasherSmile: His default expression.
* SmarterThanYouLook: He looks like a wimpy little imp, but he's a genius who's got enough skills to poise a serious threat to the Turtles.

!! The Inuwashi Gunjin

A quartet of winged humanoids who serve as Darius Dun's reluctant enforcers.

* [[AntiVillain Anti-Villains]]: They work for Darius Dun only because they have been implanted with electronic machines that Dun uses to torture and contain them. They kidnap Cody and threaten to kill him if Dun (who needs Cody alive) won't free them. They note the turtles' honor for repeatedly saving Cody who's little help to them (at the time). They finally decide to follow the turtles' example of honorability and give them time to escape from drowning.
* ForcedIntoEvil
* HeelFaceTurn: They all pull one once they are finally freed from Dun's control.
* LastOfTheirKind
* {{Proud Warrior Race Guy}}s: Their race was once the most feared force of earth and sky.
* {{Winged Humanoid}}s
* {{Worthy Opponent}}s: As they witness the turtles saving multiple times Cody who's not much of a help in a fight, they remark that to be truly honorable.

!! The Dark Turtles

Created by Sh'Okanabo from the turtles' genetic material, these four mutant turtles serve Darius Dun. They are all voiced by the same actors for the original turtles.

* BigBrotherInstinct: Kind of a grey area. Towards the end of "DNA Is Thicker Than Blood", Dark Leo divides up the meat among his brothers. This action is so unexpected that it sparks confusion among them.
* ColorCodedCharacters: The color of each turtles' skin more or less corresponds to their counterparts' bandanna colors.
* DarkIsEvil: At first. They were more than eager to try destroying their original counterparts.
** DarkIsNotEvil: They have the capacity to be better if they were given the chance.
* DumbMuscle: Dark Raph. He was so stupid that he couldn't pick up Mikey's sarcasm.
* {{Evil Twin}}s
* ForcedIntoEvil: While it doesn't occur in the same way as with their predecessors the Gunjin, the episode “D.N.A. is Thicker Than Water” implies that they have the capacity to be better turtles if it weren't for the fact that they are forced to work for Dun.
* GeekPhysiques: Dark Don is the tallest and skinniest of the quartet.
* ImAHumanitarian:
--> '''Dark Raph''': Let's crack your shell open and see if there's a yummy cream filling inside!
* LaughingMad: All of them, primarily Dark Mikey.
* {{Oddball Doppelganger}}s
* OffWithHisHead: In their first 2 appearances, Dark Leo threatened to cut off someone's head.
--> '''Dark Leo''': *holding his sword next to Cody's neck* No sudden moves, or your friend here loses his head.

--> '''Leonardo''': How long have you been working for Dun?
--> '''Dark Leo''': Details, details, you should be paying attention to more immediate matters, like keeping your head on!
* PsychoRangers
* ReptilesAreAbhorrent
* SlasherSmile / PsychoticSmirk: They at least show off one.

!! Torbin Zixx

A famed mercenary who has several run-ins with the turtles.

* AdvertisedExtra: He appears in the opening titles, despite his sporadic appearances in the series.
* CombatPragmatist: He's an extremely dirty fighter.
* ConMan: Almost every time he goes up against the Turtles, he swindles them.
* EvenEvilHasStandards: Deliver/smuggle an illegal package for an alien? Sure. Said package turns out to be a bomb that could've potentially hurt many innocent humans and aliens? Yeah, big mistake.
* HeroicSacrifice: Volunteers to make one in the final episode of Fast Forward to save Earth from a dark matter asteroid. [[spoiler: It's actually his ship, which he escaped to with a device that had been jury-rigged to destroy the asteroid.]]
* WildCard / ChaoticNeutral

!! Triple Threat

A pro-wrestler turned criminal who sports three heads, each with its own personality.

* CloudCuckooLander: The rightmost head.
* ColorCodedCharacters: Each head is colored differently: red for the violent head, blue for the calculating head, and yellow for cloud cuckoolander head.
* MultipleHeadCase
[[/folder]]


[[folder:Others]]

!! Bishop
[[quoteright:262:http://static.tvtropes.org/pmwiki/pub/images/bishop_1.png]]

A government agent who will do absolutely ''anything'' to protect Earth from aliens invasion. Head of the Earth Protection Force.

* ZeroPercentApprovalRating: In modern times, the Turtles, Splinter, Leatherhead, and even the Foot Clan thoroughly despise him and Raphael even went on record as to say he hated Bishop more than his ArchEnemy Hun. Even an important political ally to Bishop like the President of the United States itself doesn't seem to like Bishop all that much and has chewed Bishop out for constantly acting on his own. And even Baxter Stockman, the closest thing Bishop has to a friend in the show, quickly grew disillusioned with working under Bishop, based on how Bishop has constantly stalled him from working on a new human body or brought him back from the dead even though Stockman wanted more than anything to rest in peace.
* AlienBlood: Despite being human.
* AmbiguouslyHuman: He was definitely human at some point, but after [[AlienAbduction a certain event]] some 200 years ago, it's no longer clear what he is.
* AntiVillain: He genuinely tries to protect humanity from potential alien invaders. The problem is, he is sadistic, amoral, suffers a huge case of FantasticRacism against aliens and mutants as a whole, and conducts horrible experiments o reach his goals.
* TheAtoner: In ''Fast Forward''.
* BadassLongcoat: Part of his signature look.
* BackForTheFinale: After being absent for the entirety of the final season, he makes a cameo watching April and Casey's wedding with approval.
* BenevolentBoss: He can be stern or angry toward Stockman, but for the most part, he shows genuine concern for his condition ([[PragmaticVillainy if just because he still needs Baxter's knowledge]]) and, unlike the Shredder, never threaten to kill or mutilate him for his failure.
* BigBadEnsemble: He's the most prominent antagonist in the third season not aligned with the Foot. After the final defeat of Ch'Rell, in the fourth season, he forms an ensemble with Hun and Karai, with Stockman as his Dragon.
* CanonImmigrant: A character who talks while off-panel in one issue of the Mirage Comics has been confirmed by WordOfGod to be him.
* CloneDegeneration: He survived so long by regularly cloning himself in a new body that ends up degenerating after a while, forcing him to do it over and over again.
* CombatPragmatist: He ends up using his own tie to fight the Turtles, Karai and Hun and ''still'' continues to kick ass.
* DarkIsEvil: As a villain, his suit is black.
* EnemyMine: Twice:
** When the mutagen he used to create a fake alien invasion ends up unleashing mutants on New York, he teams up with the Turtles and Leatherhead to end it.
** In the fifth season, he is amongst the many villains who join force with the Turtles to stop Tengu Shredder.
* TheExtremistWasRight: In "Aliens Among Us".
* FourEyesZeroSoul: He's never seen without a pair of sunglasses, and he's a bad guy.
* GunsAkimbo: His most frequent weapons when using firearms.
* FreudianExcuse: In the 1800s, Bishop was a soldier in the Civil War who was abducted by aliens, being experimented on and genetically altered, turning him into the xenophobic WellIntentionedExtremist he is in modern times who's willing to cross any moral boundary in order to keep Earth safe from alien incursions. Given his past, it's quite understandable why he became the man he is today, though in no way does this justify all the lives he's ruined and the people he's hurt. His actions become even less justified when you consider that some of the beings he's either tortured or tried to torture such as Leatherhead, the Turtles, and Splinter are actually ''native to earth'' and are notably NOT aliens in any sense.
* HeelFaceTurn: In ''Fast Forward''.
* HeelRealization: In ''Fast Forward'', he became a better person after an alien he was experimenting on saved his life, altering his view of extraterrestrials considerably.
* HeWhoFightsMonsters: He was experimented on and never wants that fate to befall another human, but himself has experimented on aliens, regardless of their innocence.
* {{Hypocrite}}: He wants for no other human to befall the fate of being experimented on by extraterrestrial forces, but has done the same to aliens themselves. This isn't even getting into the fact he's heavily implied to have mutated Finn in "Dragon's Brew", whose wedding he was the best man for.
* IconicSequelCharacter: He's one of the most well-known characters in the 2003 incarnation, despite his first appearance being in Season 3, a rather late stage of the series.
* ImprobableWeaponUser: He'll use anything up to and including his tie and glasses in a fight.
* KarmaHoudini: Though he at least learnt from his mistakes and tries to atone for what he did.
* KnightTemplar: His noble intentions have turned him into a zealous maniac.
%%* {{Leitmotif}}
* LightIsGood: In Fast Forward where he's become good, his suit is white.
* OneManArmy: He can hold his own against all four of the turtles, AND Karai and Hun all at the same time. He's also seen effortlessly fending off the Foot Elite in Exodus.
* PromotionToOpeningTitles: From the fourth season to the sixth season.
%%* PlayingWithSyringes
%%* PoweredArmor
* ReallySevenHundredYearsOld: He's somewhere around 220.
* SinisterShades: In his battle outfit, and in ''Fast Forward''.
%%* SuperSoldier
%%* SuperStrength
* SupportingLeader: When the Turtles and Karai are fighting the Demon Shredder, Bishop takes command of the Purple Dragons AND the Justice Force along with his own men.
%%* TouchedByVorlons
* UnwittingPawn: In "Good Genes", he is promised an alien artifact of great power by an unknown entity, and has the Turtles retrieve it for him. When he gets it, he ends up destroying it, which frees the Foot Mystics from Karai's control, leading to the return of the Demon Shredder.
* VillainWithGoodPublicity: A downplayed example. He's a very secretive government agent and very few people know of his actual existence. However, he has the backing of the United States government and by the fourth season, the unconditional support of the President himself, which makes him arguably as big of a threat to the Turtles as the Foot Clan, if not moreso. He becomes yet another downplayed example by the time of Fast Forward because by that time, everyone knows of his existence and he's extremely well liked by almost everybody on Earth... but by that time, he's pulled a HeelFaceTurn and is no longer an actual villain.
* WellIntentionedExtremist: In the present.

!!Yukio Mashimi
Hamato Yoshi's friend and surrogate brother.

* {{Expy}}: For Oroku Nagi, who was AdaptedOut, being the one to compete with Hamato Yoshi for Tang Shen's feelings.
* GreenEyedMonster: Eventually, Tang Shen not requiting his feelings and Hamato Yoshi going onto a promising ordeal resulted in Mashimi murdering Tang Shen, and betraying Yoshi to the Foot Clan.
* MyGodWhatHaveIDone: Before he dies, he asks Yoshi to forgive him for all the horrible atrocities he caused.
* SmallRoleBigImpact: Without him betraying the Utroms and Yoshi to the Foot Clan and his murder of Tang Shen, Splinter and the Turtles as they are may well not have existed.
[[/folder]]

* PostTraumaticStressDisorder: Suffers from this following the Turtles and Splinter nearly killing themselves to defeat Shredder in "Exodus", especially as he feels that the family was forced to kill themselves because he couldn't save them and stop Shredder. The Ancient One eventually helps him get over this.

* JerkassHasAPoint / WhatTheHellHero?: Raph's attitude during the "City at War" trilogy. WhatTheHellHero stems from the fact that he refuses to believe that the Turtles were responsible for New York's gang war between the Foot Clan, Purple Dragons, and the Mob and he sounds like he doesn't care about the innocent people who have been caught in the crossfire. This stems from his statement that the Turtles' involvement would only "add fuel to the fire", in other words, make the situation worse and to be honest, Raph wasn't wrong; apart from Leo saving a gang of mobsters from an exploding warehouse and evacuating a man trapped in a bus, the Turtles weren't making much progress to end the war until Karai showed up and offered a truce.

* NiceGuy: Generally is the most friendliest, most outgoing and most soft-hearted of the Turtles. However, sometimes, he borders on [[AdaptationalVillainy AdaptationalJerkass]]).

* {{Adorable}}: Especially when squeeing over new technology.

* FriendToAllLivingThings: He has had several pets in the past, including his pigeon Pete and his parrot Ditto.

[[folder: Heroes]]

* BadassFamily: The turtles and Splinter, undeniably so.
* BaldOfAwesome: By virtue of being hairless reptiles.

* HappilyAdopted: The Turtles love and respect Splinter as if he were their real father.

* {{Metamorphosis}}: From turtles to humanoid turtles.

* {{Ninja}}: They are ninjas.
* TrademarkFavoriteFood: Averted in this series. Direct references to pizza are intentionally few and far between across the seven seasons. However pizza is still the most potent health item in most video games based in this continuity.

* UndyingLoyalty: The turtles to Splinter.

--> '''Michelangelo:''' How come all the weird stuff always happens to ''us''? I mean, we were just minding our own business, when WHAM, that time lady fell out of the sky, right on top of us! Now we're stuck here AND we've gotta go to that creepy-loking place! It just doesn't seem fair!!!

* TheAce

* TheChainsOfCommanding: Michaelangelo actually notes this in an episode of the 4Kids series: Leo takes the burden of being the leader so his brothers can do what they want: Dontaello's free to pursue his technological inventions, Raphael's free to let loose and fight, and Mikey's free to just relax because their brother's in control.
* CharacterDevelopment: Really beautifully put into the mix in season 4 where Leonardo becomes the best fighter of the bunch while trying and failing to master his anger and fear after being defeated and stabbed in season 3.

* {{Deconstruction}}: A minor one but in Samurai Tourist, Mikey--yes, ''Mikey''-- gives an accurate analysis as to why Leo takes the burden on being the leader: so that he lets his brothers be themselves.

* {{Determinator}}

* HeroicBSOD

* MyGodWhatHaveIDone: Leonardo has an example of this in "The Ancient One", when he [[spoiler: loses control and injures Master Splinter.]] Although he doesn't actually say the line, the look on his face after it happens and his subsequent remorse show he was clearly shocked, and deeply regretted his actions.

* WeaponOfChoice: [[DualWielding Twin]] {{Katana|sAreJustBetter}}.

* FireForgedFriends: With Casey
* HairTriggerTemper

* HotBlooded

* NumberTwo

* ArbitrarySkepticism: Michelangelo is the first to encounter Leatherhead, and when he tells them, the rest of the Turtles disbelieve him. At this point in the series, they have already encountered/know the existence of ninjas, criminal organizations, superheroes, cryptids, aliens, and mystical forces, yet a giant crocodile (mutated in the same way they were) is unbelievable.
* AttentionWhore

* BewareTheNiceOnes
* BewareTheSillyOnes

* BrilliantButLazy: He's usually portrayed as having great potential, but because of his more laidback personality, he'll focus on something more fun instead. Despite training the least, he's usually seen as at least being a better fighter than Don. He managed to beat Raph in the Battle Nexus, (and win the tournament overall via fluke at first, but later legitimately defended his title in a rematch that was rigged against him). Splinter notes that if he trained as seriously as the others, he would probably be consistently the best turtle.

* CrouchingMoronHiddenBadass: In Michelangelo's first centric episode, he becomes a superhero, saves another superhero, and during all this learns a lesson on why he's a ninja: because it's what he does best.

* FunPersonified

* JumpedAtTheCall

* LargeHam

* ScreamsLikeALittleGirl
* SecretIdentity: Turtle Titan.

* SurferDude: Less compared to Fred Wolf cartoon.

* {{Adorkable}}

* BadassInDistress: The time he was captured by the Triceratons, and the end of the Outbreak arc after being mutated a second time. Less dramatic instances are scattered throughout the 4Kids series, too, usually when it would be easy for him to solve a problem/end an episode before its time.
* BadassPacifist
* BewareTheNiceOnes
* BewareTheQuietOnes

* LovableNerd

* MrFixit
* NiceGuy

* PrecociousCrush: He has one on April.

* OldMaster

* RodentsOfUnusualSize

* TeamDad

* BatterUp

* BigDamnHeroes: Gets to do this occasionally
* BoisterousBruiser
* BrooklynRage

* TookALevelInBadass: Casey undergoes a bit of this in ''Back to the Sewer'' when training under [[TheDragon Master Khan]] (he manages to sneak attack and take down all four of the Turtles in this episode) but brainwashing is involved and the show doesn't give any strong indication of whether he retained his newfound fighting skills afterwards.

* AdaptationalIntelligence
* TheBerserker
* EmotionalBruiser: This versionn was quick to show off just how tender-hearted he is in addition to how tough he is.

* MyGodWhatHaveIDone: Leatherhead says this almost word for word when he [[spoiler: attacks Michelangelo in a fit of uncontrollable rage, leaving him unconscious and fearing him badly hurt/dead. Don't worry though; Mikey was fine.]]

* BadassBookworm

* TheProfessor

* TimePolice

* GratuitousJapanese:

-> An ancient order of ''shinobi'', assassains and spies dating back to medieval Japan. In present day, they have semi-independent chapters all over the world, overseen by the japanese head council.

* SpikesOfVillainy

* AmbiguouslyEvil

* TheDragon

* EnigmaticMinion

* GoodColorsEvilColors: A very subtle one occurs with Karai in Season 4. Normally she wears pink lipstick, but for "Prodigal Son" she wears red lipstick, symbolizing her crossover into evil when she believed she's killed the Turtles. After Leo defeats her the next time we see her she's gone back to the pink lipstick, showing she's not so evil and such a threat anymore.

* PunchClockVillain

* TheDragon

--> A New York street gang consisting of mostly teenage thugs, thieves and killers.

-->Real name: Hunter Mason. A hulking, tattooed gangster who serves as the leader of the Purple Dragons street gang.

* BerserkButton: Unless you want Hun to rudely tell you to leave him alone, do not persist with him that he placed an order. The result? Hun: (Growling) "GO AWAY! WE! PLACED! NO! ORDER!"

* FingerlessGloves

* LargeAndInCharge
* {{Leitmotif}}

-> An African-American {{Mad scientist}} and creator of the mouser robots.While he sold them off as a means to rid the city of the rat problem, he was really using them to rob banks while under the Utrom Shredder's employ.

* BackFromTheDead

* BrainInAJar

* CloneDegeneration

* EvilIsHammy

* IJustWantToBeNormal

* WeCanRebuildHim

->A man dressed up in rags and bandages who shares a rapport with rats.

* AxCrazy
* BeastMan

-> A warrior who comes to Earth to challenge Leo to mortal combat.

-> Ruler of the Battle Nexus and The Ultimate Ninja's father.

-> A Battle Nexus Championship contestant who was defeated by Splinter years ago.

-> A Battle Nexus Championship contestant with an animus towards Michelangelo.

-> Hamato Yoshi's adoptive parent and, for a time, Leonardo's sensei.
* {{Acrofatic}}

* NoNameGiven

* OldMaster

-> A quartet of long-lived ninja masters who have made it their lives mission to stop the Demon Shredder. Their names are Kon, Juto, Chikara, and Hisomi.

* BigGood
* {{The Chessmaster}}s

* GoodIsNotNice

* {{Physical God}}s

* {{Sacrificial Lion}}s

-> Four martial artists who were kidnapped along with the turtles to serve as the Ninja Tribunal's apprentices. Their names are Faraji Ngala, Joi Reynard, Adam [=McKay=], and Tora Yoshida

-> The Demon's Shredders, who had been forced to serve the Utrom Shredder until they engineered their freedom.

* ElementalPowers

* VoluntaryShapeshifting

-> Casey and April's great-grandson and heir to both O'Neil Tech and the Jones fortune.

* TagalongKid
* TeenGenius

-> Cody's robotic caretaker, who only barely tolerates the turtles.

-> Cody's uncle and legal guardian, he uses his position as the C.E.O. of O'Neil Tech to facilitate various shady dealings.

* CorruptCorporateExecutive
* EvilUncle
* FatBastard: He's gigantic.
* HighClassGlass
* IllegalGuardian

* ManipulativeBastard
* ParentalSubstitute: Is Cody's main figure of authority.
* SpellMyNameWithAnS

-> An alien invader who has determined that Earth is the ideal planet for him to spread his gene-seed.

* KilledOffForReal

* SpikesOfVillainy

-> A robot who serves as an officer of the New New York Peacekeepers and who keeps running into the turtles.

-> An A.I. who serves under Sh'Okanabo.

-> An O'Neil Tech intern and friend of Cody Jones.

* RollerbladeGood

* TeenGenius

-> A cyborg who runs the Street Phantoms, a New York gang.

* SlasherSmile
* SmarterThanYouLook

-> A quartet of winged humanoids who serve as Darius Dun's reluctant enforcers.

-> Created by Sh'Okanabo from the turtles' genetic material, these four mutant turtles serve Darius Dun. They are all voiced by the same actors for the original turtles.

-> A famed mercenary who has several run-ins with the turtles.

* CombatPragmatist
* ConMan

-> A pro-wrestler turned criminal who sports three heads, each with its own personality.

-> A government agent who will do absolutely ''anything'' to protect Earth from aliens invasion. Head of the Earth Protection Force.

%%* DefaultToGood

%%* GunsAkimbo
%%* HealingFactor

%%* ImprobableWeaponUser

%%* KnightTemplar

* AirplaneArms: The turtles consistently run like this.
** LeParkour: Unless they run like this.

* FiveManBand: The Turtles including their allies
** TheHero: Leonardo
** TheLancer: Michelangelo
** TheSmartGuy: Donatello
** TheBigGuy: Raphael
** TheChick: April
** TheSixthRanger: Casey

* HighlyVisibleNinja: They can frequently be seeing putting around on a blimp. With a giant "Turtles" on it.
** Not to mention the Turtle Van, which was customized with armored plates resembling turtle shells and laser turrets on the roof.

* TrademarkFavoriteFood: Though pizza is the favorite food of all four turtles, Michelangelo eats it more obsessively than the other three.

!! Donatello
[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/2500577_turtle296.jpg]]
-->Voiced by: Creator/SamRiegel

Donnie is still the smartest turtle like all of his incarnations. Like the other turtles except for Raphael, he loves the future for its new technology and gadgets.

* {{Adorkable}}
* BadassBookworm: He's an OmnidisciplinaryScientist par excellence as well as a skilled warrior.
* BadassInDistress: The time he was captured by the Triceratons, and the end of the Outbreak arc after being mutated a second time. Less dramatic instances are scattered throughout the 4Kids series, too, usually when it would be easy for him to solve a problem/end an episode before its time.
* BadassPacifist
* BewareTheNiceOnes
* BewareTheQuietOnes
* BigLittleBrother: Taller than Leo but, fittingly, tied with Raph.
* BondBreaker: Donatello was warped into an alternate future where he had disappeared for 20 years. Without his resourceful, tech savvyness, the Turtles were disbanded and the Shredder had succeeded in world domination. The supporting cast made up the last rebel resistance.
* FightingFromTheInside: A variant while he was prisoner on board the Triceraton mother ship, resisting against borderline MindRape. He held out for awhile, but needed help to fend the assault off.
* FirstPersonSmartass: Whenever he's the one voicing the opening narration.
* FutureMeScaresMe: One episode of the Fast Forward season has a future journal suggesting that robot butler serling might be Donatello's future self. Donnie and his brothers are grossed out by the idea. [[spoiler: Fortunately, the journal is a fake set to discourage the turtles from trying to learn too much about the future]].
* GadgeteerGenius: Considering that he's self-taught, living in a sewer, and working mostly with scavenged junk, Don's inventing abilities are downright super-reptilian.
* GeniusBruiser
* GentlemanSnarker: He's second only to Splinter where polite snarking is concerned.
* HeroicBSOD: Like Leonardo, he suffers one in the 4Kids series' last season up until the end of episode 5. Cody finally manages to fix his Time Window to send the turtles and Splinter back to the present, but due to some inteference from Viral, Splinter is vaporized and it's later revealed that he's trapped in cyberspace.
* IntelligenceEqualsIsolation: Not often, but on occasion he's sequestered off in his lab. Most noticeable in 'Return to the Underground'.
* TheKlutz: A trait that doesn't come up often-- but if/when it does, it's always in the middle of a fight or stealth mission.
* LovableNerd
* {{Metamorphosis}}: Twice-- once in the backstory, once at the end of the fourth season.
* MrFixit
* NiceGuy
* OmnidisciplinaryScientist: He's a genius mechanic, but usually also has knowledge of biology.
* OOCIsSeriousBusiness: Played backwards, actually. We get the 'serious business' part within the first few minutes of ''Same as it Never Was''. Just before the episode's BittersweetEnding, the [=OoC=] part comes in.
* OutOfCharacterMoment: Don [[spoiler: absolutely ''slaughters'' Ch'rell]] at the end of ''[=SaiNW=]'', a far cry from his [[TechnicalPacifist usually pacifistic]] actions. [[JustifiedTrope Understandable, of course]] [[BadFuture given the circumstances.]]
* PrecociousCrush: He has one on April.
* TheProfessor
* TheReliableOne
* ResistTheBeast: Happens to [[spoiler: Donatello in "Adventures in Turtle Sitting". He even begs April and Casey to "stay away from" him as he runs off, before he mutates fully and starts to attack them.]]
* SesquipedalianLoquaciousness: Donatello, being the smart turtle, is particularly fond of this. A notable example is in "The Shredder Strikes Back, Part 1", when he and Raphael are watching a football match on television.
--> '''Raphael''': 'Panthers', 'Rams', 'Bears', they even got 'Dolphins'. You'd think they'd have room for something a little more...reptilian.
-->'''Donatello''': The 'Turtles'? My friend, unfortunately the lowly turtle has been saddled by society with the stereotype of being velocity challenged.
-->'''Raphael''': Say what?
* TeenGenius
* ThisIsUnforgivable: In "Same as it Never Was", after stating a BigNo upon watching the Karai Legions kill Future Mike to his horror, Don gets pushed too far. His response? "You'll pay for this, Shredder! If it's the last thing I do, YOU WILL PAY!"
* WeaponOfChoice: SimpleStaff.
* WeirdnessMagnet: Even amongst his brothers.
* WrongGenreSavvy: Demonstrated a couple of times -- like trying something he [[SawItInAMovieOnce saw in a movie]] during a fight with the Foot. It doesn't work.
* WreckedWeapon: Donatello's [[SimpleStaff bos]] were constantly getting broken. One wonders why he never upgraded to a steel pole or something a bit sturdier.

* BrilliantButLazy: He's usually portrayed as having great potential, but because of his more laidback personality, he'll focus on something more fun instead.

* TheSlacker

* ActionGirl: Can certainly handle herself in a fight, particularly from Season 3 and onward.

* WaifFu: April sometimes demonstrates martial arts skills, after being trained by Splinter.

* BadassNormal: The only member of the team who has never had any mutant powers or abnormal origins in any continuity.

* {{Catchphrase}}: It's revealed that the young turtles were teaching him all about martial arts and fighting (although they never found out) and each took turns to teach him what they knew. The cry comes from when Mikey was training him and told him to say "Gorogoro-sama!" (translation: Lord Thunder). But since Casey couldn't pronounce it correctly, he made his famous phrase.

* EmbarrassingFirstName: Arnold. Casey is his middle name, nickname, or derived from his middle initials (K.C.) depending on the incarnation.

* CanonImmigrant: He was originally created for the 4Kids show, but got popular enough to be adapted back into the comics, and later introduced (though [[InNameOnly considerably different]]) in the Nickeldeon cartoon.

* AdaptationDyeJob: April's hair is given a purplish tone.

* BadassBookworm

* {{Leitmotif}}

* UndyingLoyalty: This is what prevents her to make a HeelFaceTurn for most of the series; She genuinely respects the Turtles, almost has a friendship with Leonardo and knows to some extent that the Shredder's motives aren't exactly pure, but due to the role he played in her life, she feels like she owes him, and stays by his side no matter what. Even when he actually is defeated, she ends up blaming the turtles for it and going on a RoaringRampageOfRevenge against them. Eventually, it takes [[spoiler:the Shredder trying to destroy the Universe (him and her included)]] to make her leave him once and for all.