* AccidentalInnuendo: "Donatello does machines!"
** Made even more hilarious by the fact that he's the only turtle without an official LoveInterest. Though it's been implied that Irma does canonically have a bit of crush on Donatello in several episodes such as "Sky Turtles" and "Invasion Of The Turtle Snatchers", which means that he's [[ShrinkingViolet really shy]], or ObliviousToLove, unless he's actually {{Robosexual}}.
** The end of the first act of "The Lost Queen Of Atlantis" has a freeze frame of Shredder taking a magic amulet off of April while she's being restrained, which from the angle of the shot looks like he's [[GettingCrapPastTheRadar grabbing April's breast]] [[EvilLaugh and maniacally laughing]] at the same time.
* AdaptationDisplacement: This is the version most people remember when they think about the Turtles (or at least most people in their mid-20's or older).
** The turtles became color coded via their bandanas here. The original comic only had their weapons as a way to tell them apart.
* AlternateCharacterInterpretation: Shredder's teasing of April. Is he just trying to piss her off or does he have a genuine VillainousCrush on her?
** This is actually ''strongly implied'' in a few episodes.
** Some fans speculate Irma's boy-craziness stems from loneliness and [[TheWoobie a desperate need for love and affection]].
*** Some see her as a {{Yandere}} in the making.
*** And even others are theorizing that her constant chasing after men (or, more accurately, anything male) is her way of covering up actually being a closeted lesbian, which leads us to:
*** April and Irma's friendship seeming to be one-sided. Irma always mingles with April, and even refers to her as her best friend, however, April doesn't necessarily seem to ever return the sentiments. On top of that, because Irma seemingly clings to April seems to egg on the above-mentioned closet theory that perhaps Irma wants more than just friendship with April.
* AssPull: Happens quite a bit, and can be excused somewhat by the show running on RuleOfFunny.
** A severe case of this happens at the end of the episode "Rock Around The Block".
* BaseBreaker: Bebop and Rocksteady are seen as either funny or annoying.
** Leonardo is either awesome or a boring GenericGuy.
** Irma is either hilarious and {{Moe}} or an obvious sign of writer sexism.
** Mikey's TotallyRadical SurferDude schtick has divided a few fans as well.
* BigLippedAlligatorMoment: Splinter looks ''extremely pissed'' in the opening scene of ''"Leonardo, Renaissance Turtle"'' for no apparent reason.
** Michelangelo delivering a pizza to a pregnant woman in ''"Pizza by the Shred"''.
*** This is actually FridgeBrilliance when you consider that the whole premise of the episode is Shredder trying to lure the turtles out of hiding by opening a pizza place with the weird pizza combinations that the turtles love. In real life it is very common for pregnant women to have tastes for strange food combinations, so this scene actually does makes perfect sense.
*** Still, the event happened out of nowhere and was never mentioned again. Also, not many children's cartoons have pregnant women.
* BizarroEpisode: "Vacation in Europe' which was ''13 Bizarro episodes in a row''.
* BrokenBase: Were the "Red Sky seasons" (8, 9, and 10) any good?
** Similar issues come up with the "Vacation in Europe" StoryArc.
** Season 4 was either the funniest season or full of pointless {{Filler}}.
* CanonSue: Carter has a level of fighting skill on par with the Turtles, a strategic mind similar to Leonardo, scientific knowledge that it's implied is even greater than that of Donatello, and April even seems attracted to him in his first couple of appearances.
** Leonardo in a lot of episodes. It's even lampshaded.
* CargoShip: Mikey X Pizza. [[BrainBleach Almost canon.]]
* ClicheStorm: Appears as one to modern audiences due to SeinfeldIsUnfunny.
* CrackShip: There is Baxter and April RuleThirtyFour. Yeah.
* CrazyAwesome: THE TECHNODROME.
** The Turtle Van and Turtle Blimp too.
** This incarnation of Casey Jones.
* CrowningMomentOfHeartwarming: Most of the ShipTease between Kala and Mikey.
* CrowningMusicOfAwesome: The opening theme for seasons 1-7 as well the "red sky" theme.
** [[http://www.youtube.com/watch?v=cTcwZ6gRXnQ The German version]], even though it was released as ''Teenage Mutant Hero Turtles''.
** The piece of music that plays when the Technodrome's on screen.
** The Italian theme song. It sounds ''absolutely nothing'' like the original, but it's nice and [[EarWorm surprisingly catchy]].
* DesignatedVillain: Baxter Stockman's worst crime (before turning into a fly) was helping out Shredder, but the way the Turtles treat him you'd think he killed their mom or something.
** Thanks to Baxter and his rat-catcher Shredder nearly succeeded in killing Splinter and Baxter also pulled off a [[TheDogBitesBack Dog Bites Back]] move where he easily defeated the Turtles and likely would have done so to Shredder as well if not for him not knowing the Eye of Sarnath's one weakness. Shredder may have easily been the more eviler of the two, but he definitely wasn't an innocent victim.
* DracoInLeatherPants: Shredder has quite a few fangirls. Doesn't help that he's sometimes more entertaining to watch than the good guys.
* EarWorm: The original theme.
** "Teenage Mutant Ninja Turtles, Teenage Mutant Ninja Turtles, Teenage Mutant Ninja Turtles, heroes in a half shell, Turtle Power!"
* EnsembleDarkhorse: Main villains Shredder, Krang, Bebop, and Rocksteady along with the Rat King.
** Even fans who dislike the Red Sky seasons admit to liking [[MonsterOfTheWeek one-shot villain]] Chronos.
** Mona Lisa only appeared in one episode, but she has a '''huge''' fan base as a result.
** Mondo Gecko. Only appeared in around two episodes (though he had a slightly bigger role in [[TeenageMutantNinjaTurtlesAdventures the Archie comic books]]) but he has a ''ton'' of fan-art, and [[MrFanservice quite a few fangirls]].
** Shredder's mother Miyoko, and to a lesser extent his little brother Kazuo.
** This incarnation of Raphael became beloved by the fanbase due to being a DeadpanSnarker.
** Irma. Cute as a button, and it also helps that the rest of her Channel 6 co-workers (save for April) are annoying [[TheScrappy Scrappies.]]
*** So much so, that [[spoiler: it seems that Nickelodeon has caught on to this, as some recent ForeShadowing in an episode of the 2012 series reveals a bespectacled caller by the name of Irma.]]
** Mutagen Man is apparently this to the 2012 show's writers according to [[http://www.usatoday.com/story/life/2013/04/03/teenage-mutant-ninja-turtles-animated-series/2048617/ this article]], stating that they want to utilize him in some way.
* EvilIsSexy: Tempestra.
** And Shreeka to some.
** Also [[GreenSkinnedSpaceBabe Medusa]].
** Shredder according to some female fans. In fact, he seems to be the version of Shredder with the most fangirls.
* FanNickname: The show's Shredder is sometimes referred to as "Uncle Phil", thanks to voice actor James Avery's [[TheFreshPrinceOfBelAir most famous role]].
* FanPreferredCouple: If fanart is any indication, Shredder X April, Raphael X Mona Lisa, Mikey X Kala, Donatello X Irma, and Leonardo X Lotus.
* FanonDiscontinuity: Seasons 8, 9 and 10, the "Red Sky" seasons. (Possibly CanonDiscontinuity, since ''TurtlesForever'' chose to ignore those seasons completely.)
** Some are more forgiving of Season 8, though.
** Though ''Turtles Forever'' was meant to highlight the differences between the 2003 series and this one, so including the more serious seasons would largely defeat the purpose.
* FunnyAneurysmMoment: One of the first episodes featured an entire building flooding out and spilling a massive amount of water in the city when said building explodes from the pressure. Though [[ArtisticLicensePhysics copious on its own merits already,]] it can hit way too close to home for those involved in the aftermath of Hurricane Sandy, especially since the setting for the cartoon is New York City.
* GrowingTheBeard: Season Three, arguably, when compared to the somewhat lackluster Season Two. It wasn't ''consistently'' good, but contains the most fan favourites.
** Season Seven, the last "normal" season, is considered to be the best of all, due to some surprisingly well-written and enjoyable episodes. "Night of The Dark Turtle" and "Legend of Koji" are believed to be ''the best episodes in the entire series''.
* HarsherInHindsight: "Enter The Fly!" has Baxter and Shredder plotting evil ''on top of the Twin Towers.'' Yikes.
* HilariousInHindsight: Lotus Blossom was introduced in the cartoon before Karai in the comics.
* HoYay: You have to admit, the way Shredder and Krang would bicker throughout the series made them look like an old married couple. May also count as NoYay.
** [[ThoseTwoBadGuys Bebop and Rocksteady]] very rarely leave each other's side. If Rocksteady didn't have his gigantic crush on April there would be a lot more HoYay going on from the fans' point of view.
** Baxter Stockman and his gender-neutral (but still male-sounding) alien computer, Zee. Watch an episode with them in it and see for yourself.
** Sometimes happens to the turtles themselves.
* HollywoodPudgy: From time to time, Irma will mention being on a diet, and although her size is mostly obscured by a baggy turtleneck sweater, on the few occasions she wears something else, it's clear that she certainly isn't even fat at all.
* IdiotPlot: The episode "Zach And The Alien Invaders" is ''easily'' the biggest offender of this in the entire series, considering that the whole premise is about Zach convincing the turtles that he's seen aliens, and robots, and other dangerous things that ended up being harmless, and getting in trouble for it. Because it's not like the turtles have ever fought aliens or robots ''before'', except you know like ''every'' episode where Krang and Shredder ''attack the turtles with the Foot Soldier robots'' which happens on a ''regular basis!'' Later on Zach does see aliens that are trying to take over the world, and helps the turtles stop them, but the episode basically sends the message that "it's OK not to listen to kids". To be fair the episode was trying to go for a "Boy Who Cried Wolf" type of Aesop, but didn't pull it off very well.
** The episode "Leonardo Is Missing" also falls under this, which is lampshaded by Splinter at the end, but unlike the first example, ''this'' episode is actually still fun to watch.
--> '''Splinter''': [[spoiler: Next time you leave Leonardo, make sure to leave a note.]]
* InkStainAdaptation: Mainly to fans of the original Mirage comic book.
* InNameOnly: A rare case of TropesAreNotBad.
* JerkassWoobie: Baxter Stockman. He's one of the least evil villains on the show but the only one with a (heavily implied) canon death.
* MemeticMutation: "Cowabunga!" and "It's Pizza Time!"
** "Turtle Power!"
** "Turtles Fight With Honor!"
** "Go Green Machine!"
** "SUPER IRMA!"
** The theme song.
** The Technodrome will definitely be one of the first things to come up in your mind when you think about this show.
** Recently, posting weird and OffModel screenshots from the show has become popular on [[ImageBoards 4chan]], several of which have become minor memes of their own.
** "...All on account of [[http://www.youtube.com/watch?v=ymFDtbk2teE those turtles!]]"
* MemeticSexGoddess: April O' Neil, so very much.
** Mona Lisa also qualifies for this.
** And Irma too.
* {{Moe}}: Irma. A good portion of the fanbase thinks she's cute as a button.
* MoralEventHorizon: [[spoiler: Shredder crosses this in the first episode of season 8 when he actually ''destroys'' the Channel 6 building which takes it out of commission for the rest of the series.]]
** [[spoiler: In the same episode, it is stated by Bezerko that Krang committed genocide against his people, because he had no further use for them]].
** Long before that, there was Shredder intentionally exposing April to the lethal fumes of the Doku plant back in "Enter: The Fly," which very nearly killed her. And this was back in the second season, which had already been made LighterAndSofter than season 1!
* NarmCharm: The series had a good amount of this, [[TropesAreNotBad and made it work well.]]
* NauseaFuel: The Turtles' ...''interesting'..' tastes in pizza.
* NeverLiveItDown: [[spoiler: Many fans are still ticked off about Shredder's destruction of the Channel 6 building.]]
* NightmareFuel: After Baxter Stockman has [[YouHaveFailedMe failed Krang one too many times]], he's tossed into a disintegration chamber. He is [[AlasPoorVillain frantically pleading for his life]], and his [[XRaySparks screaming skeleton]] doesn't make it any easier to watch. However, there was a fly in the chamber as well, and he's morphed into a giant mutant fly-man.
** Seymour Gutz ''falling apart in a vat of mutagen'' in "Enter: Mutagen Man". It's PlayedForLaughs and he survives, but still.
* ReplacementScrappy: Dregg wasn't really a ''bad'' villain by his own terms, but the mere fact that he wasn't Shredder ensured he never became popular. It didn't help that Shredder had become genuinely threatening again during his last season before being replaced by Dregg. Not even being voiced by Creator/TonyJay could save Dregg from the Scrappy Heap.
** Carter, considering he sort of replaced April in season nine (though she would take the role back in season ten).
* TheScrappy: [[TagalongKid Zach]] and [[ShooOutTheNewGuy Howie]].
** RescuedFromTheScrappyHeap: However, Zach did have his share of valuable moments like when he saved April's life in "Bebop And Rocksteady Conquer The Universe" and the turtles' lives in "Night Of The Rogues", which both earned him a good amount of fans.
** Carter has a ''few'' fans, but most of them agree that he doesn't really belong on a show like TMNT.
** Burne and Vernon aren't well liked either. Especially for being huge [[JerkAss selfish jerks]] and constantly bad mouthing the turtles, even when they ''saved their lives''.
*** Though they were ''intended'' as ineffectual antagonists, so it would be more weird if people actively liked them.
** Most FillerVillains, due to being unoriginal (almost ''all'' of them are gangsters or mad scientists, and nearly identical ones at that), and the fact that they just aren't as interesting as Shredder or Krang.
* SeasonalRot: Some fans agree that this happened during Season Eight, when the sky was permanently red and the show took on a DarkerAndEdgier tone.
** Having said that, Season Eight isn't entirely without its fans; a few consider it to have struck a good balance between the show's original tone and that of the comic book. In addition, Shredder became a serious threat again for the first time since the very beginning of the show. However, fewer people are willing to defend Seasons Nine and Ten, when Lord Dregg replaced Shredder and Krang. Though the 3-part "Return of Shredder and Krang" arc in the middle of season 10 does have its fans, with many feeling that it served as a better finale to the show than the actual series finale.
** A good chunk of Season Four (and some of Five) is considered this by some fans (though following seasons improved), due to {{Flanderization}} and VillainDecay, [[IdiotPlot extremely goofy/borderline nonsensical plots]], [[OffModel bad/inconsistent animation]], weak one-shot bad guys, and lack of action scenes. Proof that UpToEleven isn't always a good thing.
* SeinfeldIsUnfunny: This probably ''started'' most modern-day cartoon cliches.
* SoBadItsGood: Even the worst episodes are strangely enjoyable. This is probably the show's greatest strength.
* SoCoolItsAwesome: Generally agreed to be the best mainstream American cartoon of the eighties, and has a devoted fanbase.
* SoOkayItsAverage: Season Two is widely considered this: not as good as the short first season preceding it or the long third season following it, but perfectly watchable regardless. The "Eye of Sarnath" StoryArc and "Enter The Fly' are considered its highlights.
** How a lot of fans feel about Season Five. It has some of the series' best ("My Brother, the Bad Guy") but it also has some of the series' ''worst'' ("Donatello's Badd Time" and "Zack and the Alien Invaders")
* {{Squick}}: ''Those goddamn pizza toppings''. This may be why the Red Sky seasons did away with them completely.
** Baxter's mutation into a fly.
** The turtles' mutation in season 9.
** The sewers. Lampshaded constantly.
* TearJerker: Though much more lighthearted than the 2003 version this show still has its moments of this. One of the most memorable is the episode "Turtles, Turtles Everywhere." Shredder and Krang reprogram a network of robotic garbage trucks and order them to capture "the turtles." With no knowledge of the TMNT, the trucks start rounding up every turtle in the city, and eventually what is said to be the last surviving member of an endangered sea turtle species, just as she was about to lay her eggs. One of the reasons it's such a great episode is that, unique among shows in TheEighties, it's actually a GreenAesop ''done right.'' Unlike ''CaptainPlanet'' villains and much more similar to real-world polluters, Shredder and Krang aren't actually intending to damage the environment as its own end; they're just greedy and don't care if it's a side-effect. At the end of the episode, they [[spoiler: put a stop to the plan and return the sea turtle to the beach to finish laying her eggs and the resident joker ''Michelangelo'' starts sobbing as she swims off saying that she reminds him of his mother.]] Also, while they attempt to end the episode on a humorous note after that bit, it actually becomes sadder when rewatching it as an adult, when you can think about it enough to worry that even though [[spoiler: the sea turtle got to lay her eggs after all, based on April's claim that she was the last surviving member of her species, the eggs might not have been fertilized. So she could still be the last of her kind, ever.]]
** In the episode "Splinter No More", it's pretty hard to see Splinter lamenting his loss of his humanity to the point of shedding tears. This becomes much HarsherInHindsight when you remember that Splinter destroyed Shredder's Retro Mutagen Ray in order to save the turtles, but also destroying the one thing that could return him to his human form in the process.
** Also in the episode "Hot Rodding Teenagers", it's tough to see [[TheWoobie Kala]] break down as she explains that the only reason that she and the other Neutrinos are on the run is because that they are kids who would like to have fun instead of fighting in Dimension X's infinite war, and are being hunted down for it.
--> '''Kala''': "You don't know what it's like.... living in a place where everyone wants to do you in....just for the crime of being ''young''." [[TearJerker (She starts to cry.)]]
** The beginning of "Splinter Vanishes".
** The penultimate example for most fans of the original series is in the opening episode "Get Shredder" where [[spoiler: Shredder actually ''destroys'' the Channel 6 building which takes it out of commission for the rest of the series.]]
* TheWoobie: Michaelangelo has his moment of this when he thinks everyone forgot his birthday in "Michaelangelo's Birthday", which makes it even worse when he runs into Shredder.
** Also Splinter in "Splinter No More".
** Donatello in "Donatello's Duplicate" ''easily'' counts for this.
** Leonardo in "Take Me To Your Leader". Even this Leonardo-neutral fangirl wanted to hug him.
** Raphael in the beginning of "Raphael: Turtle Of A Thousand Faces".
** Baxter Stockman, even when he was a JerkAss. Some scenes where he's abused and mistreated are actually pretty uncomfortable to watch.
** Krang sort of was one in "Hot-Rodding Teenagers from Dimension X". It's the sadness in his voice when he tells General Traag how he lost his body when they "banished him to this [[InsignificantLittleBluePlanet miserable mud-ball]]" as well as how upset he was about Traag and Granitor seeing him without his body.
** The Neutrinos also count considering they're just kids in a [[CrapsackWorld war filled world like Dimension X]], and are hunted down because they don't want to join in on the fighting. Especially [[TheChick Kala]].
--> '''Kala''': "You don't know what it's like.... living in a place where everyone wants to do you in....just for the crime of being ''young''." [[TearJerker (She starts to cry.)]]
** Irma could also be seen as this, seeing as how she can never quite seem to have a decent boyfriend.
* TheyJustDidntCare and OffModel: The animation in some mid-series episodes looks downright ''HIDEOUS'' (especially almost half of season 4).
* TheyWastedAPerfectlyGoodCharacter: Mona Lisa.
** Howie, despite being TheScrappy, had some cute scenes with Irma, and the idea of her having a steady boyfriend is admittely interesting. Too bad everything else about him was so ''annoying''.
** Lotus Blossom. Her second and final appearance is considered FanonDiscontinuity due to being such a disappointing farewell to her.
* TheyWastedAPerfectlyGoodPlot: "Night Of The Living Rogues". Fed up with Bebop and Rocksteady's incompetence, Shredder gathers a large group of the Turtle's previous enemies to defeat them once and for all. The Turtles are completely helpless against the assembled baddies. So will this cause the the Turtles to call on all of their allies, like The Mutant Frogs, Usagi, Mondo Gecko and Mona Lisa leading to a huge brawl between the groups? Nnnnnope. Instead, the Turtles just call on Casey Jones and Zach the "fifth turtle" for back up, and the villains run away at the end when it's pointed out that they're outnumbered. Keep in mind that one of those people is a kid, and the other two are April and Irma.
** The subplot of "Krangenstein Lives!!" [[spoiler: Shredder loses his memory]]. Pretty interesting right? You'd think they'd go for something different but...[[spoiler: he's still evil, he just can't remember his name]]. There are ''so many'' different ways that could have gone.
** The seventh season had an episode called "Dirk Savage: Mutant Hunter", where an eccentric billionaire [[spoiler: who is secretly a mutant slug plotting to take over the city]] named A. J. Howard hires bounty hunter Dirk Savage to capture all the mutants in New York. Considering the episode's focus on mutants and the large number of mutants the show had, you'd expect fan favorites like Mona Lisa or Muckman to return, but this was not the case. While Mondo Gecko and the Punk Frogs Napoleon Bonafrog and Genghis Frog returned in this episode, the only other mutants that appear in the episode are Tokka and Rahzar from the second movie and a bunch of unnamed mutants created solely for this episode. It's still a good episode, just an example of how good things could have been better.
** Fans who dislike Bebop and Rocksteady often wish Baxter stayed TheDragon to Shredder in Season Two.
* UglyCute: Baxter's half-fly form. D'awww. Strange, considering he was an apparently middle aged man beforehand.
** Some actually find his ''human self'' to be adorable, strangely enough.
** The Shredder as a fly. His voice is freaking ''adorable''.
** Krang, sometimes.
* UncannyValley: Some episodes had a [[OffModel very rubbery, constantly-changing art style]] which more often than not resulted in some ''really'' creepy faces and expressions.
** [[BrainInAJar Krang]] himself, if you think about how he would look in real life.
*** His first appearance in "Enter The Shredder", where he's slimy and pulsating.
** Some of the Red Sky-era villains/mutants. One of the most memorable is Doomquest, a giant-like conqueror of worlds with very small eyes.
** The turtles' mutant forms in Season 9.
** The rubber face-masks the turtles use for some of their disguises.
* UnfortunateImplications: The BrokenAesop of "Zach And The Alien Invaders" which basically states that's okay to ignore kids, even if their ''right'' about something serious is a pretty terrible lesson to teach children. This becomes much HarsherInHindsight when you remember that ''children'' are the main audience of the show, and hearing about their words being degraded solely because of their youth.
** It may have been a poorly written take on the story of The Boy Who Cried Wolf, since Zach wasn't believed due to mistaking everyday occurrences and such for real-life equivalents to the aliens he read about in his comic book. In addition, children are not exactly known to be accurate all the time.
** The stereotypical Chinese restaurant in "Were-Cat of Channel Six".
* UnintentionallySympathetic: Baxter Stockman seemed to be more concerned with becoming human again than being genuinely evil.
* VillainDecay: Shredder and his cohorts. A case of TropesAreNotBad, as they became a ''lot'' more funny and unique. And reversed in the "Red Sky" seasons which saw Shredder become much more competent and dangerous.
* WhatDoYouMeanItWasntMadeOnDrugs
** Lampshaded in ''{{Turtles|Forever}} [[{{Crossover}} Forever]]''.
-->'''2003 Raphael''': Was that a mutant... banana?!\\
'''2003 Michelangelo''': This dimension is seriously messed up.