Badass Normal: Make no mistake, they're powerful turtles... But compared to the other mutants that have actual superpowers, all they have is their martial arts training, incredible teamwork, and iron will.
Create Your Own Villain: The Turtles have a rather bad habit of this, though some examples are more prominent than others.
Divergent Character Evolution: The Turtles, in each previous series, had more or less the same design, just with different weapons and coloration (whether it be bandanas or their own shade of green on the body). This series goes through a little more effort to diversify them, giving them their own body types, eye colors, and physical quirks.
Game Face: The turtles switch from cartoony eyes (first used in the '87 cartoon) to all-white eyes (from the old comics and 2003 cartoon) once it's time to throw down... or for Rule of Funny.
They also have interlocking and detachable go karts called Patrol Buggys.
Trademark Favorite Food: Pizza, as per usual. Unlike the '87 cartoon, they don't subsist solely on pizza: Mikey was going to make omelettes in "The Gauntlet," and "Cockroach Terminator" shows them enjoying ramen.
Authority Equals Asskicking: Although Raphael is stronger, Leo is also showing signs of raising his skill level as the show goes on. As of Episode 13, he's the only one of the turtles to successfully land a blow on Master Splinter and holds his own going one on one later on.
In later episodes, he's the one who frequently plays bait for high-level foes to give his brothers time to regroup and strike back together.
Big Brother Instinct: Towards all his brothers, even though he's never officially stated to be the oldest.
The Kirk: His leadership style tends to lean toward this—not surprising, since his main source of inspiration is an expy of Captain Kirk—but he'll occasionally wander into The McCoy territory when he's showing mercy at the expense of winning and even The Spock when he's being coldly calculating.
The Paragon: Discounting the above moment, Leonardo is consistently the most moral of the turtles and is the most concerned with being honorable and noble. This sometimes works against him though, and he has come under criticism from Raphael due to his way of doing things.
Red Oni, Blue Oni: The blue to Raphael's red, and also reflected in the color of their headbands.
Reverse Grip: Much more prone to this than in other continuities.
The Strategist: Donnie is undoubtedly the Smart Guy of the team, but Leo's no slouch either. He's the one who usually comes up with the plans, whether they're high-level missions or just impromptu ways to get out of temporary jams.
"Well Done, Son!" Guy: Zigzagged. While most of what Leonardo does is to please Splinter, he sometimes disobeys Splinter or even do the opposite of what he says if Leonardo believes otherwise.
Voiced by Sean Astin
"Was that supposed to sound tough or stupid?"
Actor Allusion: In "Turtle Temper", Raphael is forced to go home by the other turtles because his temper got the best of him, but came back when his brothers are attacked by Spider Bytez. Does this look familiar? Not to mention that he is also one of the shorter of the turtles, yet is the most determined combatant.
Aloof Big Brother: Partially inverted. He's younger (in fanon, never officially confirmed) than Leonardo making him an aloof little brother, but older than Michelangelo and Donatello, playing straight for them.
The Beastmaster: Not only is he a bud to non-mutated creatures, but it seems that he can control them a fair bit, given that in "Follow The Leader", he gets a swarm of pigeons to help out in not getting detected.
Big Brother Instinct: Towards Michelangelo, all the time. Raph is able to overcome even his fear towards a Terminator-esque Cockroach mutant the second Mikey's in trouble. He shows this towards Donny once as well, keeping him from embarrassing himself any further than he already has.
And yes, this even includes Leonardo, especially in regards to Karai and the last battle of the Season Finale. It seems that this instinct is what makes him a great second in command but a poor leader; he's not willing to sacrifice his brothers and doesn't want them hurt.
The Big Guy: As with many of his incarnations, Raphael is the strongest of the turtles; whenever there's a need for brute strength, he's the turtle to call.
Hair-Trigger Temper: To the point an episode was based around teaching him to learn to control it better.
He Who Fights Monsters: In "Never Say Xever", he starts to show signs of this when he viciously condemns Leo's showing mercy, and expresses views more appropriate for someone like The Punisher.
Heroic Comedic Sociopath: In "Rise of the Turtles Part 2," he rips an arm off of one of the Kraang's robot suits and uses it to barricade a door, resulting in him getting looks from his brothers and Leo calling him "seriously twisted," which Raph takes as a compliment.
Hidden Depths: Seems to have something of a soft spot for non-mutant animals.
Jerkass Façade: Oh, he cares. He just doesn't want anyone else to know he cares.
Jerkass Has a Point: In "Karai's Vendetta," when Donnie is fully prepared to abandon their mission to destroy the Kraang's base to save April from Karai, Raph quickly points out that if they do so, the Kraang will poison everyone in New York, including April.
Dogged Nice Guy: Veering into Stalker with a Crush territory. His laptop wallpaper is a photo of himself with April, he uses his robot to get a closeup of her face without her knowing (at least, that was the intention), and he has a flowchart dedicated to getting her to hang out with him.
Big Damn Heroes: In "Parasitica" he not only cures his brothers of their Brainwashing, he also then saves them from the Parasitica wasps. He also pretty much lampshades this trope repeatedly to his brother's mild annoyance.
Cassandra Truth: Mikey is the first to discover the true nature of the Kraang, and when he tells his brothers, no one believes him. When they see it for themselves, Mikey quickly goes off on an "I told you so" routine.
Heroes Prefer Swords: Amusingly invoked in "Pulverizer Returns" when Mikey decides that when using Leonardo's Katanas he automatically becomes the leader of the team, much to Leo's annoyance.
Hidden Depths: "Parasitica" shows that, in a pinch, he's got a fairly good memory and ability to follow the typically long-winded instructions given to him by Donatello before the Wasp's Mind Control takes effect.
Shellachne also indicates that he's the best cook of all the brothers.
I Warned You: After his brothers see the Kraang's true nature first hand, Mikey pretty much spends the entire rest of the episode rubbing it in their faces that he was right all along.
Innocently Insensitive: At times. Like in the second season premiere; the way he tells April that they were the ones who accidentally spilled the mutagen that turned her father into a giant bat just makes one want to punch him in the face.
Never My Fault: Has a habit of this. From saying that Donatello shouldn't have trusted him with the T-Pod (something Mikey himself wanted to test), to drinking Retro-Mutagen and blaming Donatello for not telling him that it was dangerous (the container of which had multiple signs on it telling one to not drink it).
The Nicknamer: To the point he gets annoyed when one of their foes gives himself his new name.
Trademark Favorite Food: Pizza. He was the first to try it and tried to convince the others it tasted bad so he could keep the rest for himself.
Variable-Length Chain: Aside from his trademark nunchaku he can combine them (or something) into a kusarigama. That the kusarigama is frequently shown to be longer than both the nunchaku put together doesn't seem to matter.
Composite Character: Like in the original cartoon, Hamato Yoshi mutated into Splinter. He's also the one who bought the turtles from the pet shop instead of simply finding them in the sewer, taking the place of Chet in most other continuities.
Cursed with Awesome: Being a rat, he's able to move far faster, shown in his fight with Shredder
Determinator: He's lost his family and his humanity leaving him with no choice but to live in the sewers with four mutant turtles. And he managed to make a new life and family out of it. The show does not gloss over this.
Honor Before Reason: This version of Splinter makes a point of consistently averting this trope. First when he urges Leonardo to seek victory, not fairness and then again when after Leatherhead is brought to the lair and he tells the turtles it's important to show compassion, his response to whether or not they'll still chain him up is:
My Greatest Failure: His anger-fueled attack on Oroku Saki after he insulted him in front of Tang Shen caused their rivalry to intensify, eventually leading to the murder of his wife and the loss of his daughter at Saki's hands.
MacGuffin Girl: "TCRI" reveals her to be this. Taken even further in "Karai's Vendetta" where she now has the Foot after her as well, to the point that Splinter and Leonardo tell her she'll need to stay in the lair indefinitely for her own safety.
Missing Mom: She doesn't have a mother. Her revealing this to Karai catches her off guard long enough for her to take Karai down.
No Sell: She is shown in "Karai's Vendetta" to be immune to an acidic Kraang liquid, which is likely part of the reason why the Kraang are interested in her.
Oblivious to Love: Initially to Donatello. Becomes less oblivious as the show progresses.
Reality Ensues: In addition to April's training as a Kunoichi averting Instant Expert, her later fight with Karai makes no attempt to dodge the hard truth that someone who's been training for years and has been in actual fights is going to beat someone who has never been in a serious fight and has only been training for at most a few months.
Replacement Goldfish: Pretty much stated to be one for Miwa by Splinter towards the end of "Baxter's Gambit.'' though not in the hurtful kind of way.
Shipper on Deck: For Leo, at least until he tells her that the girl he's interested in is a Foot Clan member.
Weapon of Choice: She goes through several choices in "Baxter's Gambit" before settling on a Japanese metal war fan.
What the Hell, Hero?: Gives one to the Turtles in "The Mutation Situation" after she finds out that they were the ones who spilled the mutagen on her dad and turned him into a giant bat, albeit accidentally, to the extent that she declares their friendship over and swears that she never wants to see them again. However, she forgives them in "Target: April O'Neil when Casey tells of an event that happened between him and his best friend that ended their friendship.
You Can't Go Home Again: With both the Shredder and the Kraang after her, the turtles and Splinter decide that she must stay with them in the sewers for her own safety, at least until the crisis is resolved.
Raphael's ordinary pet turtle. For tropes specific to Slash see "Other Villains".
Face-Heel Turn: From cute normal turtle to a homicidal monster. It's implied his Start of Darkness was much earlier and mutating just gave him an outlet to express himself beyond chewing on his leaf in agreement with Raph's venting.
Foreshadowing: While Spike is a rather stoic turtle he can be clearly seen to be smiling while watching Raph lashing out against his brothers when he gets frustrated with them and started hitting Mikey with a rolled up comic book.
Vagueness Is Coming: His warning to April in "The Gauntlet" is just that something terrible is about to happen.
A robot turtle made by Donatello to fight in his place after he gets tired of breaking his bo staff.
A.I. Is a Crapshoot: Subverted, in his debut, Metalhead is just a drone, and when his connection to Donnie is severed, a Kraang takes control of it and turns it against the turtles, and Donatello must destroy it. After he's been rebuilt Donnie seemed to have installed a rudimentary AI in him, and he seems docile.
Arm Cannon: One of the various weapons in its arsenal.
Curb-Stomp Battle: He dishes out two, first to all the Turtles except Donnie (which Donnie even lampshades), and then again to a group of Kraang that only ends when Donnie loses Metalhead’s signal after his antenna breaks off.
Death by Irony: Aside from being destroyed his own creator, he’s also taken down with the very weapon that Donatello’s dissatisfaction with led to his creating Metalhead in the first place.
Frickin' Laser Beams: Metalhead’s primary weapon. Notably when Donnie is in control the lasers are bluish white, but when the Kraang take control the lasers become the same fuchsia color of the Kraang’s weapons.
Heel-Face Revolving Door: Starts out as Donatello's robot, then gets hi-jacked by a Kraang, and then gets rebuilt to fight for the Turtles again.
Hoist by His Own Petard: He was destroyed by his own creator. Not only that but Donnie also used Metalhead’s own weapons against him during their fight.
A scientist and former colleague of Dr. Falco. Used as a guinea pig for Falco's modified mutagen, becoming a mutant chimpanzee with psychic powers. Voiced by Frank Welker.
Baleful Polymorph: Instead of giving him the appearance and attributes of a primate, the mutagen experiments that were performed on him turned him into one which, psychic powers aside, appears completely normal, showing no signs of having retained any of Rockwell's intellect or personality.
Chained by Fashion: Has shackles on his arms, legs and neck. Justified because he's an escaped test subject.
A blind noodle chef targeted by the Purple Dragons and later Xever. Voiced by Sab Shimono
Blind and the Beast: April takes the turtles to Murakami's restaurant specifically because he is blind and can't see that they aren't human. He later figures it out through his other senses, but is not afraid and is very grateful to them for saving his life.
Cool Old Guy: He seems to be an understanding, reasonable, and nice guy in addition to being a great chef.
Heroic Bystander/Handicapped Badass: When Karai gets into his shop, he's quite suspicious of her, especially her order of Turtle Soup. When a fight breaks out, he throws the soup in her face and stalls her long enough for April to escape, all the while pretending to be a klutz via blindness.
A baby alligator the Kraang used as a guinea pig for the mutagen, and presumably other experiments. He managed to escape the Kraang, taking the power source for the dimensional portal with him. Voiced by Peter Lurie.
The Aloner: Though Mikey attempts to break through to him, at the end of both of his appearances, Leatherhead is still alone.
Heroic Sacrifice: In “TCRI” where he goes through the portal to Dimension X to keep anything else from coming out of it.
Immune to Bullets: The Kraang typically fire innumerable rounds of laser fire into him. He doesn't even flinch. Possibly justified because normal alligators' scales can withstand a lot of punishment and he's a heavily powered up and mutated one.
Jerk with a Heart of Gold: Despite his berserker rages and subsequent aloof behavior he is a nice guy who doesn't want to hurt others, aside from the Kraang.
Failure Hero: He wants to be a hero like the turtles but has none of the skills or training required to be one so his attempts to "help" the turtles often do more harm than good.
Fat Idiot: Well, He appears overweight which makes his attempts at being a hero look even more pathetic, too lazy to put in all the training and work needed to be a vigilante, and too dense to see why it is necessary no matter how much Donnie tries to teach him. He even happily confesses to wearing muscle padding under his turtle hero suit.
Heroic Wannabe: As mentioned he wants to be a hero just like the ninja turtles, hence his (amateurish) superhero-like costume based on an older design of the turtles.
Hidden Depths: During his training montage with Donnie, he made a picture of himself with muscles on a sketch pad that was well drawn and mentions driving/delivering ice cream from a truck which at the very least requires a driver's license.
Idiot Hero: Deconstructed rather horrifically in the end.
Knight of Cerebus: In a tragic way. His mutation into Mutagen Man is played Dead Serious with no jokes at his expense unlike previous victims. Mikey even stops joking after seeing what a Tragic Monster he had become, only snarking when Leo ordered a distraction; even then, he still talked in a rather somber manner.
Running Gag: "The Pulverizer Returns" sees him twice running off down the same alleyway and causing a car crash both times due to his complete inability to be stealthy.
Too Dumb to Live: Him trying to expose himself to the mutagen despite being warned how dangerous it is. Particularly egregious since Donatello repeatedly tried to save him from being turned into a Mutant yet he still willingly subjected himself to it.
Tragic Monster: The most tragic of them all. Not even the Shredder was treated as seriously as him after his mutation.
Vader Breath: He's given a synthetic voicebox to allow him to speak as Mutagen Man, though the result is scratchy and labored.
Walking Spoiler: Rivals The Rat King for the amount of character spoiler tags on this page.
Well-Intentioned Extremist: Tries to find April for Donnie in an attempt to make him happy. Getting attacked by the Police and the Turtles made him go more crazy.
What the Fu Are You Doing?: Since he wants to be like the ninja turtles he tries to fight like them even though he has little practice or patience to learn how to use ninjitsu correctly, which is why Donnie tried to act as his "Sensei".
Whole Costume Reference: His costume looks like the Turtles from 80's cartoon, right down to the letter on the belt.
"All my life I knew I was meant for something greater. This is my calling, my destiny. My city is infested."
A teenage boy who becomes a vigilante. Debuted in Season 2. Voiced by Josh Peck.
Admiring the Abomination: He notes how cool Mutagen Man is, even during the fight in which Mutagen Man is trying to kill him.
Amazon Chaser: Liked seein April beating up Mutagen Man with her Tessen fan.
Badass Normal: He has none of the formal training of the Turtles or Splinter, but manages to go up against Mutagen Man, who is several times larger than him and has acid powers. He also takes out a bunch of Foot Bots the first time he meets them, armed with nothing but a hockey stick no less, putting his natural talent even above the Turtles who outright lost to the Foot Bots fighting as a team the first time around.
Blood Knight: Was seen fighting Mutagen Man instead of running away. Brave boy...
Taken up a notch in his next apperance, where he thoroughly enjoys fighting an army of robot foot ninjas.
Book Dumb: He meets with April because he needs a tutor, not because he wants to get better in school mind you, but just so he doesn't get kicked off the hockey team.
Dark Is Not Evil: He dresses in fairly dark clothes and has a clear punk aesthetic, but is a good guy.
He's also this to Donnie, his rival for April's affections, being a Blood Knight who playfully flirts with her in contrast to Donnie's Smart Guy who obsesses over her without making any significant moves to win her over.
Jerkass Has a Point: In "Target: April O'Neil," he recounts to April an accident he caused between him and his best friend that ended their friendship and remarks that "sometimes things happen that you can't control." As Donnie had previously stated the exact same thing to April, April slowly realizes that she's making the same mistake Casey's friend did and reconciles with the Turtles.
Jerk Jock: In his first appearance he's smacking hockey pucks around the hallway without a single care for who he hits.
Shredder to Splinter: The Big Bad and Big Good behind the scenes that judge the outcome of missions. Dogpound also compares them as being equal in skill but having totally different values in the Season 1 Finale. They were formerly best friends.
Bradford to Leonardo: Initially The Leader on the field and the master's most trusted disciple
Dogpound to Michelangelo: Butt Monkey to the team though Dogpound is unintentional and Mikey mostly embraces it. They also used to be 'Facebook' friends.
Karai to Leonardo: The new Leader on the field, have the closest relationship with the master and are the most skilled. They both wanted some sort of truce between the two clans at one point, but after having to defend their families from each other they develop a personal feud on top of the family one.
The Shredder/Oroku Saki
"Your skills are impressive. But they will not save you."
"There is undoubtedly a fascinating story behind how my old nemesis came to teach ninjitsu to four mutant turtles. Perhaps I will let one of you live long enough to tell it."
Once the best friend of Hamato Yoshi, jealousy over Yoshi's marriage to Tang Shen, who they both loved, prompted him to turn to the dark side, and attempt to kill Yoshi. A fire that broke out during the battle disfigured Saki, and seemingly killed both Shen and her and Yoshi's daughter. Subsequently becoming the head of the Foot Clan, Saki moved to New York to hunt down and kill his old nemesis after seeing a news broadcast that implied that Yoshi is still alive. Voiced by Kevin Michael Richardson
Handicapped Badass: He's clearly blind in his right eye, and it doesn't make him any less formidable or scary.
Bad Boss: He makes it a clear point that he would not hesitate to mutilate his lieutenants if they disappointed him. He threatens to harm Karai in the same way if she doesn't eliminate Leonardo the next time they meet. Keep in mind that Karai's his daughter.
In the episode "Pulverizer Returns!", he's gathering mutagen to use on his minions. If you're lucky, mutagen turns you into this◊ or this◊. If you're unlucky, you turn into this◊.
Bald of Evil: Judging by the end of the first episode and Xever's flashback, his hair is gone, most likely due to the burn scars he's suffered. Confirmed in the Season 1 finale when Splinter knocks his helmet off
Benevolent Boss: Compared to his 2003 incarnation he's this though, seeing as how even after his minions have failed him repeatedly, he still hasn't killed them yet.
Big Bad: As per tradition of the ninja turtles' franchise, he seems to be this.
Big Bad Ensemble: So far sharing this with the Kraang, as both of them have served as the main recurring threats and both playing a part in the turtles' origin.
Blade Below the Shoulder: His trademark tiger-claws, which here are bigger and come in a pair as opposed to just one. He can also have a third blade pop out of his gauntlets, and all of them are retractable
Brutal Honesty: When Karai asks him if he would punish him even if she's his daughter. He notes that she's especially the case.
The Comically Serious: Rather rare, but two instances stand out in "Panic In The Sewers" and "Karai's Vendetta", respectively:
(Learning that Dogpound was defeated) "...They defeated you with go karts, and a water balloon?"
(Upon his first time speaking to one of The Kraang) "Do they all speak like this?"
Composite Character: His vocals and basic design take cues from the 1987 Shredder, but the clothes have a red tint similar to the original comics, while having the combat prowess and effectiveness of the films and 2003 incarnations.
Cool Helmet: Like follows the samurai-like kabuto/helmet style of his previous incarnations.
Even Evil Has Loved Ones: Possibly his daughter Karai, but it's not clear. Ultimately subverted in the Season 1 finale where it's shown that he's just using her to get back at Hamato Yoshi.
Evil Counterpart: Is this to Hamato Yoshi/Splinter. Both are equally skilled combatants, and both are the leaders of their respective clans. Chris Bradford/Dogpound even remarks on their similarities to Xever/Fishface, stating that Splinter is just as skilled as Shredder, but "doesn't have the stomach to finish the fight."
Good Scars, Evil Scars: A significant portion of his face is covered in burn scars, and his right eye is whited out.
Green-Eyed Monster: His jealousy of Hamato Yoshi for winning Tang Shen's love prompted their feud.
If I Can't Have You: To Tang Shen, to the extent that he burned down Splinter's house and killed her in a jealous rage.
Accidental Murder: Possibly subverted, as according to the Turtlepedia it is implied to have been an accident.
Knight of Cerebus: The episodes he's in usually make it clear that it's not going to be the same as a one-off adventure, and whenever he's in a fight scene, things get really ugly. The fact that he's a much, much more personal enemy to the Turtles and won't settle for anything but attacking them where it hurts (such as stealing Hamato Yoshi's child and raising her as his own to get his ultimate revenge on his former friend) earns him this status.
Mythology Gag: When he first shows up in The Gauntlet, Donatello nervously says, "do you think that's The Shredder?" and Raphael replies, "well, it's definitely a shredder", referencing the various versions of The Shredder appearing in each of The TMNT series and original comics. Word of God says that The Shredder earned his title when Kevin Eastman and Peter Laird were talking about a villain who used cheese graters as offensive armor. Originally he was going to be called "The Grate-Man" but Pete Laird decided on "The Shredder".
No Sense of Humor: He's very serious, to say the least. This is especially evident in his interactions with Karai.
Obviously Evil: Let's see deep voice, evil scars, dangerous looking costume covered in spikes, calls himself "Shredder"... Definitely a bad guy.
Orcus on His Throne: What he's been for most of the first season so far with the exception of "The Gauntlet" where he takes action against the Turtles after Bradford and Xever fail him one time too many.
Pragmatic Villainy: Despite Baxter Stockman's Mousers losing them a chance at finding the turtle's lair, Shredder spares him because he has use for his talents.
Revenge Before Reason: Has shown shades of this in 'Alien Agenda'. However, after Karai gives him a working piece of Kraang technology, he changes his tune. He does this again in "Enemy of my Enemy", prompting Karai (who also lampshades his problem) to seek an alliance with the turtles. Splinter calls him out on this in the Season 1 finale, claiming if he dies, Shredder will have nothing.
He's still an asshole though, seen in the Season 1 finale though, where it turns out that he took Hamato Yoshi's daughter and raised her to hate her biological father simply to hurt Yoshi.
Two-Faced: The fire that killed Tang Shen has burned roughly half of Shredder's face, as shown when Splinter knocks his helmet off.
Villain Team-Up: It appears that he and the Kraang will be doing this against the Turtles now that they've realized how much of a problem they are to both. He does so by helping to capture April and handing her over to the Kraang.
Vocal Evolution: His voice is a little higher pitched in "Enemy of My Enemy", sounding slightly more like his 1987 counterpart. It's still plenty deep though. "Karai's Vendetta" also adds a slight echo to his voice.
You Have Failed Me: Consistently averted, surprisingly. In contrast to his 2003 counterpart, this version of Shredder has yet to mutilate any of his lieutenants despite the fact that they have all failed him multiple times.
Chris Bradford/Dogpound/ Rahzar
Click here for spoilers
A famous martial artist and one of the Shredder's lieutenants. Becomes a mutant dog and eventually the 2012 version of Rahzar in season 2. Voiced by Clancy Brown.
Badass Normal: Pre-Dogpound, he was able to hold his own against the Turtles.
Bad Boss: Consider who he works for, and this is a given; He is at one point seen kicking one of his own men while they're down when he's annoyed, and regularly belittles Baxter Stockman, sometimes alongside Xever. The latter didn't work out for him.
Baleful Polymorph: He hates his mutation into Dog Pound. Subverted when he mutates into Rahzar.
Evil Virtues: Bradford has a few of these traits, like his loyalty to the Shredder, his sense of honor in regards to his loses, and his valor in not giving up.
False Friend: When Michelangelo attempts to befriend him, he goes with it and uses the connection to attempt to learn more about the turtles.
Foil: Prefers a more pragmatic approach and is rather famous, while his partner is a street rat who likes to take a much more violent and sadistic approach. His attacks are also much more brute force-based.
Lightning Bruiser: He was fairly quick as a human, but lost this aspect when he became Dogpound, becoming more of a Mighty Glacier, a fact he complains about in Mikey Gets Shellacne. He stops complaining when he mutates into the far more quick and powerful Rahzar.
Nice Job Fixing It, Villain: Not only does his attempted Taking You with Me in "The Gauntlet" disarm the Mutagen Bomb, it covers him and Xever in Mutagen, mutating them into a dog man and a fish man. It gets zigzagged though, since his mutant dog form has much more physical strength, along with increased sense of sound and smell at the cost of losing some of his speed and most of his stealth as a human ninja.
Took a Level in Badass: After being mutated, he gains invulnerability to the point where Leo slashes him with his katanas, and he catches them, and strength enough to pick up a car. Not that this stops the turtles from defeating him.
Takes another when he falls into a vat of mutagen, mutating again.
Villain with Good Publicity: He's a martial arts superstar with a chain of dojos across the country, but he's secretly Shredder's star pupil.
Villainous Friendship: Type 3 with the Shredder, he's loyal and devoted to him, but the Shredder cares not for Bradford.
Arch-Enemy: Seems to be Raphael's, since when the Turtles and the Foot clash, they usually fight each other.
Artificial Limbs: The reason why Baxter was taken by the Foot is because the Shredder needs him to give Fishface both artificial legs and what appears to be a scuba tank that pumps water into Xever's gills.
Attack The Tail: Splinter beats him in "Showdown" by tricking him into biting his own tail.
Ax-Crazy: The most obvious case out of Shredder's henchmen.
Badass Biker: He drives a fearsome-looking chopper in "Pulverizer Returns!"
Badass Normal: Pre Fishface he was still able to hold his own against the turtles.
Evil Counterpart: Possesses a preference for violence and prefers sharp tools to do his work, as well as a somewhat bad temper, much like Raphael, the character he usually tends to fight. These similarities are called upon in "Baxter's Gambit", where a discussion as they're working together leads the two to conclude that they are "of a kind".
Expy: Of Hun from the 2003 cartoon both having connections to street gangs specifically the Purple Dragons. The only difference is Hun is the leader of the Purple Dragons while Xever is merely an associate. There's also the fact that Xever and Hun were both mutated into animals. The animal mutation would also make Xever and Bradford expies of Bebop and Rocksteady.
I Just Want to Be Normal: Downplayed, with his robotic legs and breathing apparatus, Xever is comfortable with his mutation, at least moreso than Bradford is, but when he thinks Stockman can change them back, he jumps on the chance.
Scary Black Man: Though not as dark as other examples, so he may be Latino instead.
Slasher Smile: He often has one of these as a human, though since he is unhappy with his transformation Fishface doesn't smile as much.
The Sociopath: Has no regard for any form of life whatsoever, is completely morally unfettered, and displays many other sociopathic traits. "Baxter's Gambit" however does show a slightly softer side of him in his interaction with Raphael.
Took a Level in Badass: Once Baxter finishes his new legs and breathing tool, he quickly shows in "The Pulverizer" that his new legs are even more versatile than his original ones, and on top of that, he has venomous teeth.
Villainous Friendship: A Downplayed Type 4 with the Shredder. Like Bradford, the Shredder doesn't really care for him, but finds him useful enough to spring from jail and even commissions robot legs for him to stay in the fight. Unlike Bradford, Xever isn't necessarily loyal to the Shredder, mostly just in it for the thrills.
Butt Monkey: Got this a lot back when he worked at TCRI, and it doesn't get better when he meets the turtles.
Call Back: He uses Mousers like his other counterparts and will become a mutant like his 1987 counterpart.
Card-Carrying Villain: Doesn't seem to deny that he's this trope, when Michelangelo asks why he's a villain.
Composite Character: Appears to be loosely based on the comics version in ethnicity, but his design borrows aspects of the version seen in the 1987 show (hairstyle, physique). Concept art shown at a convention shows that he's also going to become a fly, just like in the 1987 series.
The Dog Bites Back: After being picked on for almost every episode by the Turtles and threatened by his higher-ups, he decides to take payback in "Baxter's Gambit".
Affably Evil/Faux Affably Evil: Friendly and sociable to the turtles but still very much a bad girl. Following their betraying her trust, she develops a full-blown hatred of them. In "Karai's Vendetta," her normally sociable and easygoing personality here only serve to highlight the sadistic pleasure she takes in hunting April.
Ambiguously Evil: Subverted in "Alien Agenda", where the "ambiguous" part disappears. Played straight again in "Enemy of my Enemy" though, and the end of "Karai's Vendetta".
Antagonistic Offspring: Shredder revealed to Splinter that after their fight, Shredder took Miwa away and changed her name to Karai. However, Shredder told her a different story, reversing his and Splinter's positions, so Karai doesn't realize she's this.
Anti-Villain: Subverted, then later played straight: something of a Woobie, Destroyer of Worlds example (she's only evil due to circumstances she couldn't control when she was a baby) with shades of Noble Demon (Though as noted below, she's kinda erratic on that.
Arch-Enemy: To Leonardo as of "Enemy Of My Enemy" and April as of "Karai's Vendetta"
Badass Biker: In her street clothes and due to having a motorcycle that she drives in "Enemy of my Enemy" and "Karai's Vendetta".
Badass Normal: She has no special powers beyond her training and no transformations or robotics to enhance her in any way.
Dark Action Girl: She's been able to hold her own against any of the turtles, and has no trouble at all with the Kraang-droids.
Dark Is Evil: She primarily wears dark colors and makes no secret about how dangerous she is to the turtles.
Dating Catwoman: In only one episode, she and Leo connected pretty well. Subverted later in "Alien Agenda" when she betrays Leo and he gives up on her. Shades of this pop up again in "Enemy of my Enemy"... only to end up coming apart at the seams again.
Deadpan Snarker: Compared to her previous incarnations, this version of Karai is much more snarky and less serious, willing to snark even in front of her father.
She does this again in the aptly-titled "Enemy of my Enemy", where she actively seeks out the alliance after learning of the danger of the Kraang. Once again, it doesn't last, but this time, it's the turtles' fault rather than her own.
Hidden Agenda Villain: Her actions and expressions during the coda of "The Alien Agenda" indicate she has reasons all her own to make sure the Foot Clan get advanced technology.
It Amused Me: Her explanation for not killing Leo, and probably anything else she does. Shredder's private conversation with his daughter implies he believes that might not be the only reason, though.
Hypocrite: She's not in the best position to criticize the Turtles for betraying her when she had earlier done the exact same thing and showed absolutely no remorse doing so. That said though, it's equally telling that the Turtles gave her grief for betraying them yet later betrayed her in turn.
In season one, she remarked that Shredder was "obsessed with revenge". In season two, she becomes bent on taking revenge against Splinter, even disobeying Shredder's orders to do so.
Jerk with a Heart of Jerk: Seems this way at the end of "Alien Agenda". Later appearances subvert this and show that she really does have good qualities and that it's just (literally) difficult for her to express them due to her Lack of Empathy.
Jerkass Has a Point: While it is true that the Shredder is the turtles' enemy, in choosing to try and take him out they show that this is more important than their alliance with Karai, which was the source of Karai's disappointment. She thought the turtles, in particular Leo, was better than that and was willing to work with her against a common enemy and is right to say that Leo was the one who betrayed her this time, not the other way around.
While her rage against Splinter is understandable and even pitable since it's a huge lie Shredder has fed her all her life, she certainly doesn't come off too well trying to kill the Turtles or April just to personally hurt him.
Lack of Empathy: As stated above, she abandons the Turtles even though the Eldritch Abomination attacking them was her own fault, and when Leo points out that he trusted her, she mocks him. Then again, she was raised by a full-fledged sociopath, so it isn't very surprising.
Shame If Something Happened: They're introduced trying to extort Murakami, and a later episode reveals they have to pay tribute to the Shredder, presumably for the "priviledge" of operating under his name.
Cool Mask: With almost bug-like eyes, like most incarnations of the foot.
Dark Is Evil: Mostly black, fitting their role as stereotypical ninjas.
The Faceless: Since they are never seen unmasked, and the robotic foot wouldn't have a face aside from their "masks" any way.
Ineffectual Sympathetic Villain: And lampshaded by the turtles in "Pulverizer Returns". Justified because it turns out that most of them are not properly trained ninjas but rather just anyone the Foot Clan can find and recruit.
Kiai: Robot Foot Ninja constantly shriek in small bursts.
Replacement Mooks: Season 2 replaces the human mooks with robots who are far more powerful than the previous ones.
The Voiceless: Aside from the robotic foot's monkey-like shrieks.
An upgraded robotic foot ninja created using Chris Bradford's armor, first sent out to hunt down April. The 2012 version of Chromedome.
A.I. Is a Crapshoot: Created for Karai to destroy April, but the Kraang put in an override program to capture her instead. It later malfunctions, and starts trying to destroy everyone in sight instead.
A race of malevolent brain-like creatures from another dimension, they've been abducting and recruiting human scientists to help them modify their mutagen, which they plan on altering the Earth's atmopshere with. Voiced by Nolan North
Bayonet Ya: Though rarely used, a good many of their laserguns feature chainsaw-like bayonets not unlike the ones from Gears of War.
Big Bad Ensemble: With the Shredder. Although, they have much more prominent role than the Shredder, being more dangerous than him and his Foot Clan and being directly or indirectly responsible for everything that happens in the series, making them theBig Bad for the entire first season and overall main villains in the series.
Cannon Fodder: The basic Kraang droids are pathetically easy to beat, and readily fall against not just the Turtles, but also every other character who's ever gone up against them...exceptthe Pulverizer.
Composite Character: The Kraang combine the name of Krang from the original cartoon with elements of the 1984 comic/2003 cartoon's Utroms, such as their robotic human disguises.
Conservation of Ninjutsu: Avoided in the first two episodes, where they do fairly well against the Turtles, though this might be because the Turtles hadn't quite learned how to work together yet. Later episodes play it straight, with several Kraang troopers not being able to cause much damage, but when they bring out Traag or a spaceship designed specifically to kill them, they are much more difficult to overcome.
Villains Out Shopping: Two Kraang's have a conversation about a gluten free diet making one of their member thinner.
Villain Team-Up: It appears that they and Shredder will be doing this against the Turtles now that they've realized how much of a problem they are to both. They do so during the last episodes of Season 1. Shredder captures April to lure Splinter into a trap, and then hands her over to them when he succeeds in doing so.
The Voiceless: Outside of their robo-suits, the Kraang seem to only be able to speak in shrieks and snarls.
Department of Redundancy Department: Kraang Prime speaks without the aid of his exo-suit and does so in a much less redundant way than his minions. He even refers to himself in the singular, specifically naming himself 'Krang'. He does, however, occasionally slip into the redundant habit of his lessers.
Kraang Prime: The invasion that is known as the invasion of Earth begins...now.
A huge aquatic beast the Kraang brought from Dimension X to guard their underwater base/Kraang-water production facility. The Turtles distract it to enter the base, but have to fight it to escape.
Attack of the 50-Foot Whatever: Its head alone is as tall as Donatello, to say nothing of its length and width. The creature's entire body is longer than the Turtle Sub and just as tall back-to-belly, but it's not as thick.
Stock Ness Monster: The creature has the same body style as most reports of Nessie, with a humped back and swan-like neck. Its flippers are more paw-like though, with rounded ends and short claws. It also has two tendrils dangling from its lower jaw.
Stock Sound Effect: When holding the Turtle Sub, the creature makes humpback whale and orca calls.
A driver for the Kraang who gets mutated into a mobile weed. Voiced by Danny Jacobs.
Alien Blood: After his mutation into a plant based creature, since it has "blood" that is like chlorophyll.
Body Horror: Not only is his heart clearly visible in his mutated form, his bones and muscles can be seen on the inner sides of his legs.
What Measure Is a Non-Human?: After his mutation, the Turtles have no qualms against potentially lethally electrocuting him. Of course, given that he works for the Kraang and helped them capture April, they weren't very concerned with his safety to begin with.
A middle-aged schlub who attempts to parlay his recording of the turtles into big cash, only to get turned into a spider-like creature by the Kraang's mutagenic ooze. Voiced by Lewis Black.
Bullying a Dragon: As a human, he tried to blackmail the Turtles into giving him money for his picture of them, even though he clearly saw them fighting alien robots without a sweat. Had Splinter not instructed them to try to get the picture back without violence, they would probably have taken it from him easily.
Fat Idiot: Continually mistakes the Turtles for frogs, for one thing, despite the very obvious fact that frogs don't have shells. Of course, there's always the possibility he just kept calling them frogs to make them angry.
Instant Expert: He gets the hang of his new form and abilities right off the bat, with no learning curve whatsoever. Unlike Snakeweed, who at least expressed mild surprise when one of his severed limbs grew back, he isn't even shocked to discover he can throw up acid and webbing.
A scientist involved with the Kraang. He modifies their mutagen, tests it on one of his colleagues, and then uses it to give himself psychic powers. A subsequent lab accident turned him into this continuity's version of the Rat King. Voiced by Jeffrey Combs.
Adaptational Villainy: Most incarnations of The Rat King either want to be left alone or just advocate rats, sometimes even working with the Turtles. While this one keeps the rat advocate trait, he seems to be fond of personally attacking people or works to spite those around him (be it harming Rockwell or enjoying the fact he's going to make Splinter kill his sons).
Animal Motifs: As The Rat King, which this incarnation takes a little farther by showing his eyes sunken in, his fingernails having grown much longer, and grotesque teeth.
Bitch in Sheep's Clothing: He appears to be a pretty nice guy for most of his first appearance; we only learn at the end of it that not only was he the villain of the episode, but he also practice experiments on his own partner just so he could get psychic powers.
Body Horror: As the Rat King, he is hideously emaciated and corpse-looking, likely having been burned terribly when his laboratory caught fire.
Dark Is Evil: His new look as The Rat King evokes this to the extreme.
Discard and Draw: His empathic abilities seemed to be temporary, but manages to get the presumably permanent ability to control rats.
Evil Counterpart/Not So Different: Tries to paint himself as this to Splinter, saying that they both have lost their humanity, see through the eyes of rats, and eventually lost everything that they stood for.
From Nobody to Nightmare: Goes from a scientist to a (temporary) empath to a man who controls all the rats in New York City.
Knight of Cerebus: Not so much so in his first appearance, but as the Rat King, he attacks the Turtles very personally (trying to murder April and take control of Splinter), and tries to make Splinter give up his humanity via Mind Rape.
Red Eyes, Take Warning: His eyes become bloodshot after he injects himself with the psychic neuro-chemical. After his transformation into the "Rat King" the few times you see his eyes show that they have turned into a more Body Horror like example of these, as seen on the Nightmare Fuel page.
Sai Guy: He briefly uses one of Raphael's sais in his first appearance.
Body Horror: The mechanical stuff on the roach before it mutated was just that: Stuff on the roach. When it mutated, the machinery merged into it, and you can frequently see veins in its buzzsaws and first person view shots. Not to mention that after it molts, it looks like a giant maggot with limbs and robotic wings.
Nigh-Invulnerability/No Sell: As Donatello explicitly points out in the episode, cockroaches are a deceptively durable species. Spy-Roach's mutation just took it Up to Eleven. In the episode, he shrugs off laser blasts, getting run over by the Shellraiser and Raph's bike, and getting pelted by manhole covers.
A mutant Wasp that is the result of a Kraang Mutagen experiment Gone Horribly Wrong. It winds up infecting Leonardo with a mind-controlling stinger who then passes it on to Raphael and Donatello, with all three becoming guards to the wasp's egg
Badass: It took the Turtles a while to take it down and in fact it only finally lost because because it used its stinger, which killed it.
Badass Crew: Likewise, the three offspring are also quite dangerous, managing to damage Donatello's bo staff and disarm Raph and Leo of one of their weapons each. They are only destroyed by Michelangelo using the Shellraiser's cannon
Beware My Stinger Tail: Since it is a wasp this is a literal example and the fact that it renders its victims as mindless slaves to protect its offspring until the offspring can eat them doesn't help.
Ludicrous Gibs: Much like Spy-Roach, the three Parasitica Wasps are destroyed in such a manner that causes them to explode in a shower of slime. Unlike Spy-Roach though, their deaths seem to be actual.
Orifice Invasion: The Squirrelanoids reproduce by forcing themselves down a living being's throat, splitting into two inside the stomach, then forcing their way back out through the mouth.
Shout-Out: They look like lower-rated versions of the alien from Alien.
A new mutant ninja turtle with a vendetta against Raphael's brothers and tries to become his new "partner". He was originally Raphael's ordinary pet turtle Spike before being exposed to mutagen. Voiced by Corey Feldman.
Axe Crazy: While normally similar to Raph on a good day pressing his Berserk Button reveals the monster underneath.
Badass: He effortlessly curbstomps the turtles in rather unfamily friendly manner and in a straight fight he's better than Leo or Raph.
Battle Trophy: He takes Mikey and Donnie's bandannas after beating them down and wears them as arm bands on his right arm, until Raph takes them back.
Divergent Character Evolution: Like the Turtles, Slash has undergone a design overhaul to make him more unique: He is much, much larger than any previous incarnation, has spikes protruding from his body instead of wearing protective plating (though the spikes seen in the shell are still prominent), and instead of the katana he usually is seen with, has a large mace. He's also the smartest incarnation of the character to date.
Evil Is Bigger: Slash is the evil version of the turtles and he towers over them.
Evil Counterpart: His vices match Raphael almost to a tee (jealousy regarding the brothers, takes great pride in his sheer ferocity, and has a fairly bad temper), and a fighting style that is a lot like Raphael's aggressive fighting style. Unlike Raphael, he doesn't put his vices aside for anyone and doesn't even bother to tone down his aggression.
Evil Former Friend: Raph initially treats him like a Sixth Ranger. When Michelangelo meets him he might have done the same until Slash immediately beat him to a pulp right in front of Raph's face. Raph changes his mind about the Sixth Ranger thing pretty quick.
And not only is he very fast and agile, he's just as good at ninja stealth as the other turtles are.
Mask of Sanity: He appears to be a smart, loyal, hardworking ninja who understands Raphael's position and his problems with his brothers. Too bad his mind is too twisted to understand things like how no matter how frustrating families can be that doesn't mean things would be better if they weren't around, there are more important things in life than being strong, or that caring for others isn't a weakness.
Mythology Gag: He learned ninjutsu by observing Raph (and likely the other turtles) train during his years as a pet. Just like the original Mirage Splinter did from his master.
No-Holds-Barred Beatdown: He delivers what may well be the most brutal beating the turtles have received to date in this show. We got bruises, scratches, swollen eyes, Donnie needing help to walk and a splint on his arm.
To really drive home how much this trope applies, when one sees the turtles' first fight with Shredder, he beat them pretty badly too, but they were still okay enough to run away when Shredder became momentarily distracted. Slash beat them up so brutally that Donnie and Mikey were too injured for the group to properly flee from him, and the main reason they actually manage to survive their fight with him was because Slash accidentally fell off of that building's roof.
Sadist: It's clear that he is far more powerful than the other Turtles, but doesn't actually kill them. Given his comment on how long he's wanted to hurt Leonardo, it's possible that he's actually prolonging their deaths as long as he can just because he's enjoying beating the crap out of Raphael's brothers.
Shadow Archetype: He's Raph's shadow. Basically he could be considered the personification of all of Raphael's hatred, rage, and love of combat unfettered by his redeeming qualities and love for his brothers.
Spikes of Villainy: He has spikes growing out of his arms, shoulders, head, and shell...maybe he should have kept his old name, it's more fitting.
Voice Changeling: At one point, he mimics Leonardo's voice perfectly to ambush Michelangelo. It hasn't been explained if it's one of Slash's mutant powers or if Slash can naturally do that.
Well-Intentioned Extremist: Zig zagged. As a good guy, he has yet to do anything a normal person would consider heroic, but as a villain, he hasn't done anything malicious other than defeating the turtles which he thought was a good thing since Raph gave him the idea that the other turtles were lazy morons.