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The Evil League of Mutants

Baron Draxum

Voiced by: John Cena [EN] (Season 1), Roger Craig Smith [EN] (Season 2), Raúl Anaya (Latin American Spanish)

A sheep-like Youkai warrior and alchemist from the "Hidden City". He is also known as the "Maker of Mutants". As the self-proclaimed protector of all yokai-kind, Baron Draxum seeks to mutate humans into mutants.

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• Affectionate Nickname: Mikey and April call him "Barry" once he steps down from being a villain.
• Ambiguously Gay: In a flashback Draxum is seen ogling Lou Jitsu, who's striking a dashing pose with his shirt torn open. Draxum is also considered to be the Turtles' second father, and it's implied that he still has a fondness for Splinter. He also doesn't respond to Big Mama's flirtation as she expected, though that could just be him wanting to keep things on a business level.
• Anti-Villain: He's not really antagonistic towards the Turtles, and his goals seem to have the aim of the protection and betterment of youkai kind. However, he lacks empathy for humans and seems to be plotting genocide by conversion.
• Arch-Enemy: For Splinter/Lou Jitsu for being the one who mutated him and the Turtles, costing him his chance at a life outside of the Battle Nexus.
• Arc Villain: The biggest villain and Final Boss of the first season before having a Heel–Face Turn in the second.
• Beautiful All Along: Underneath the mask he's quite handsome, at least by human standards.
• Being Good Sucks: In the series finale, he briefly complains that life was a lot easier when he didn't like the Turtles or Splinter, but still finds himself having to stop Shredder from simply killing Splinter. However, this is averted as it's simply just a ploy to ambush Shredder and he still genuinely cares about them either way without any strings attached.
• Big Bad Ensemble: He's one of the major antagonists of the series, the other being Big Mama. Draxum is responsible for creating the Oozesquitoes and the Turtles, which will go on to create several villains of the Turtles' Rogues Gallery, while Big Mama wishes to use said mutants as contestants for the Battle Nexus.
• Big Bad Wannabe: He's ultimately used as a pawn by the Foot Clan to revive the Shredder, who proceeds to depower and upstage him as the main villain.
• Brutal Honesty: When asked if mutation would hurt by a pizza delivery boy who'd stumbled into his hidden city, he responded by telling him that if was doing it right, Yes.
• Card-Carrying Villain: He calls his Villain Team-Up the "Evil League of Mutants".
• Casting Gag: John Cena voices a villain who has the ability to turn invisible in reference to Cena's "You can't see me" catchphrase and the memes surrounding it.
  • Him being a villain could be seen as one. Online WWE fans have been very vocal in their desire for John Cena to undergo a Face–Heel Turn, but for more than a decade, he's been the same uncomplicated good guy. There's also irony to be found in the fact that Baron Draxum makes a Heel–Face Turn after Cena stopped voicing him.
• Character Development: By the end of "Repairin' the Baron", he seems to be trying to make a genuine effort to live alongside the human race. Also, through no small effort on Mikey's part, Draxum has gradually been reconciling with the TMNT family, proving to them that he's a changed man through heroic, selfless acts.
• The Comically Serious: He's got a fairly serious personality, but has his fair share of comedic moments, often from when his stoicism is broken. Case in point:
  Big Mama: Scrambulent to see you again, Baron Draxum, but you really must learn to use the dimbly door.
  Baron Draxum: You must learn to use real words!
• Chuck Cunningham Syndrome: Inexplicably the only major ally of the Turtles fully absent in Rise of the Teenage Mutant Ninja Turtles: The Movie, while even Cassandra makes a cameo appearance he doesn't even gets a mention or picture of him brought up.
• Curb-Stomp Battle: He utterly trounces the turtles during their first battle despite their best efforts. Donnie is the only one who manages to get a hit in, and that was by complete accident as Draxum was blindsided by Donnie's out-of-control staff.
• Crush Filter: When he sees the turtles for the first time, this filter is applied over them. It's more him marveling at the success of his experiment though.
• Dark Messiah: He has proclaimed himself as the Protector of Mutantkind. His means of doing so involves plotting genocide on the human populace via conversion. After obtaining the Shredder armor, he decides to just eradicate the human race the old-fashioned way.
• Decomposite Character: His personal enmity with Splinter/Hamato Yoshi is similar to previous incarnations of Shredder and Splinter, both of whom had never met in this continuity due to the Shredder being a centuries-old demon. He also briefly controls the Foot Clan, and tries to become the Shredder, but ultimately fails due to underestimating how dangerous both the group and armor are.
• Disc-One Final Boss: Draxum is initially introduced as the main villain of the series, but by mid-Season 1, the Foot Clan take over as the main antagonists, with Draxum working with them. Even taking over the Clan seems to have been part of their plan, with their plan to have Draxum wear the armor so that it'll eat his life force. By Season 2, he's no longer the main villain, and ends up joining the heroes too.
• Emperor Scientist: The head of an underground mutant city and an alchemist to boot.
• Evil Counterpart: He seems to be a bit of one to Donatello, having a fixation on his scientific pursuits that borders on unhealthy. He even gets a Crush Filter when seeing the Turtles for the first time, apparently brought to tears by the perfection of their mutations.
• Evil Versus Evil: Baron Draxum and Big Mama don't get along with Big Mama wanting to use Draxum's Oozesquitoes to make more warriors for her Battle Nexus. Draxum on the other hand wants to use them to get rid of the "human problem" and is not pleased that Big Mama is using his Oozesquitoes.
• Evil Is Hammy: John Cena brings a lot of his showmanship to Draxum. Even at his most serious, his every word is a dramatic declaration. And that's not getting into him going full-ham while singing the solo for "Warring Warrior Scientist".
• Evil Is Not a Toy: He underestimates the power of the Shredder's armor, trying to take its power for himself, only to end up having his own life force drained as he's spat out. Later on in "Air Turtle", Draxum is on the other side of this trope when he repremands Leonardo for using a dangerous mystic artifact to enhance the abilities of a failing basketball team (which ends up turning the players into demons).
• Evil Sounds Deep: Again, courtesy of John Cena, who gives him a very booming voice. It remains even after Roger Craig Smith takes over the role (although Draxum makes his Heel–Face Turn by the time Smith replaced Cena).
• Evilutionary Biologist: His plans for mankind involve transforming them into mutants with his Oozesquitoes.
• Expressive Mask: It's revealed in Repairin' the Baron that he's been wearing a fully-encompassing helmet the entire time, one that happens to have eye holes that are capable of emoting. It falls off and breaks at the end of the episode as he saves the lives of a human woman and her child, symbolizing his Heel–Face Turn.
• Fake Defector: He complies with the Shredder's demands in the series finale, and says that he always planned on betraying Splinter and his family. It turns out to be a ploy to try and ambush Shredder that is doomed the moment he enacts it, and reaffirms he's genuinely changed.
• Genius Bruiser: An intelligent alchemist responsible for creating the Ooze, and is no slouch in combat, easily beating the less experienced turtles. Huginn and Muninn call him a "Warring Warrior Scientist" in their song.
• Good Costume Switch: His mask falls off and shatters on the ground while trying to save two humans in "Repairin' The Baron", which seems to cement his Heel–Face Turn. It's very telling that Draxum doesn't redon his original armor after this; instead, his outfit is now entirely nonthreatening, consisting of a kimono and a hairstyle very similar to Splinter's.
• Green Thumb: He is able to summon large purple vines for a variety of purposes, such as strangulation, transportation, and even making a chainsaw for some reason.
• Heel–Face Turn: At the end of "Repairin' the Baron", he decides to attempt to live among the humans rather than try to destroy them after a lot of coaxing from Mikey. He still hates humans, but seems to be making a greater effort to tolerate them. Later on in "Hidden City's Most Wanted", Draxum finally reconciles with Splinter, apologizing for his past misdeeds against the TMNT family before giving himself up to the Hidden City police so that Splinter and Michelangelo can escape (Splinter and Mikey return the favor and bust Draxum out of prison later along with the rest of the TMNT family who had each also gotten arrested during their own various misadventures in the city). In "Battle Nexus: New York" Draxum risks his life several times trying to free the citizens of New York from a mystic artifact that Big Mama had trapped them all in.
• How the Mighty Have Fallen: He's living in an apartment room unable to do anything but shout empty threats at people come his return in "Repairin' the Baron", and that was after Mikey originally found him homeless on the streets. Due to the Shredder draining his life force, he can't even manifest his vines, at least not until the end of the episode. Sometime after his Heel–Face Turn, he regains his old strength, allowing him to manifest his vines easily once again.
• Jerkass: Draxum is very blunt and rather uncompromising, and also casually ruins the lives of people he comes across. After his Heel–Face Turn, he starts warming up to the Turtles and humans, although not by much.
• Jerkass Has a Point: He tells Splinter in "Hidden City's Most Wanted" that he wouldn't even have his sons if it weren't for Draxum experimenting on him, which Splinter ends up agreeing with.
• Karma Houdini: Zig-zagged. While Draxum’s is unable to return to the Hidden City and is forced to live on the streets of New York, he’s never arrested for his crimes against humanity and Yokai-kind due to Mikey and his family helping him on account of Draxum creating the turtles and Splinter, i.e. him being family.
• Lack of Empathy: He doesn't really have very much regard for human life, with many having their lives ruined due to being mutated by his Oozesquitoes, and had no qualms with manipulating the Foot Recruit to take over the Foot Clan. Even after his Heel–Face Turn, he rules the cafeteria with an iron fist, and still seems to want to dabble with Oozesquitoes before April tells him to knock it off. He also tells Splinter that he gave him purpose by using his genes to create the Turtles in "Hidden City's Most Wanted", trying to deflect that he ultimately destroyed any chance of Splinter returning to his old life, although Draxum does apologize for his actions. He also plainly states, when Splinter says that he doesn't want the Turtles seeing some of his most sensitive memories in "E-Turtle Sunshine of the Spotless Mind", that that isn't his problem.
• Mook Maker: He apparently created the Ooze, and the Oozesquitoes as a means of distribution. He's also capable of summoning a large mutant to battle the turtles for him in the pilot.
• Moral Luck: This is the crux of why Mikey considers him family. If he hadn't mutated Splinter and the turtles, the turtles wouldn't exist and would never have become a family. Draxum also argues that Splinter's life is actually better now than it was before he had his sons, which Splinter eventually accepts. That said, Mikey does acknowledge that he didn't mutate them for the right reasons and Draxum does eventually apologize to Splinter for doing so.
• My God, What Have I Done?: The look on his face when beholding the reborn Shredder at the end of Season 1 screams this as he realizes that, in his paranoia towards humans, he wound up unleashing what might be the true destroyer of Yokai-kind.
• Not So Above It All: Barring his stoic reaction to most things that annoy him, he decides, after Huginn and Muninn flatter him enough, to join in on the Villain Song in "The Evil League of Mutants".
• Obviously Evil: He looks borderline demonic, has a deep voice, and outright tells a teenager he's going to mutate that it will hurt. If he's doing it right.
• O.O.C. Is Serious Business: The fact that he casually swats away an Oozesquito and mostly ignores fighting the Turtles in "Shadow of Evil" tips the Turtles off that Draxum might be planning something big.
• Reformed, but Not Tamed: Even after he decides to reconsider his campaign against the human race, he still retains much of his ruthless and prideful personality. When he takes up a job in the human world as a cafeteria worker, he runs his cafeteria more like a boot camp, where even the most minor of infractions warrant the threat of physical violence. He also hasn't completely given up on turning people into mutants using Oozesquitoes.
• Self-Fulfilling Prophecy: He wants to stop the threat to youkai kind...only to find out too late that he was the one who caused it by teaming with the Foot Clan and letting them resurrect Shredder.
• Surrounded by Idiots: He gives off this vibe in all of his interactions. Not surprising given he's more competent and serious than any other villain in the show. Or so he thought. The goofier tendencies of the Foot Lieutenant and Brute keep him from realizing that they're manipulating him into resurrecting the Shredder.
• Suspiciously Similar Substitute: He's an armored villain whose actions contributed to ruining Hamato Yoshi's life, which also resulted in the creation of the Turtles, similar to the Shredder. Downplayed after Season 2, where he becomes heroic and he and Splinter eventually bury the hatchet.
• Terrifying Rescuer: His appearance scared the woman and child he tried to rescue, but they soften up to him after he saved them.
• Thicker Than Water: Upon finding him living on the streets homeless, Mikey decides to help him get his groove back and try to turn him around on his opinion on humans in Repairin' the Baron on account of him being the turtles' creator. Note though that this is pretty much only Mikey's opinion of the guy for much of the episode until Draxum's Heel–Face Turn at the end.
• Third-Person Person: He will occasionally refers to himself in the third person, usually when making a Badass Boast.
  Draxum: Baron Draxum does not surrender!
• Token Evil Teammate: Even after joining the Hamato Clan, it does very little to quell his inability to relate to other people, he didn't give up on experimenting with Oozesquitoes until April told him to knock it off, and even when acting heroically tends to use unscrupulous tactics.
• Unreliable Narrator: His memories of Lou Jitsu paint the man as a fierce warrior who enjoyed his time in the Nexus. The truth was less so.
• Unwitting Pawn: The Foot Lieutenant and The Foot Brute manipulated him into donning the Shredder Armor over the course of the first season, empowering the Shredder with his life energy to help the ancient demon revive.
• Villain: Exit, Stage Left: He manages to use his remaining strength to escape through a portal during the Shredder's resurrection while the Foot are distracted. Though considering Muninn and Huginn are shown searching for new employment in a following episode, he never returned home.
• Villainous Cheekbones: As suggested by his helmet shape, he has these. Ironically, they only get put on full display after he's undergone a Heel–Face Turn.
• Walking Spoiler: The extent of his history with the Turtles and everything that happens to him post Season 1 reflects some massive changes and revelations within the story.
• Worthy Opponent: He holds Lou Jitsu aka Splinter in high regard for his fighting abilities.
• We Can Rule Together: He wants the Turtles on his side, and offers to train them in the pilot. This is of course rejected. Poetically enough, he eventually ends up joining them.
• Well-Intentioned Extremist: Upon hearing a prophecy about the end of youkai kind, Draxum is on a one-man quest to stop said threat. Unfortunately, he assumes that said threat is humanity...

Huginn and Muninn

Voiced by: Tim Simons (Huginn), Sam Richardson (Muninn)

Two gargoyles that are perched on Baron Draxum's shoulders.

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• Heterosexual Life-Partners: Huginn and Muninn have been close friends since their bootcamp days.
• Jerkass: Huginn seems to delight in tormenting and frightening others, as shown by his only vocalizations during his first appearance being malicious laughter. This aspect is downplayed in later episodes in favor of his friendship with Muninn.
• Mythical Motifs: Huginn and Muninn were named after the ravens perched on Odin's shoulders who flew around the world and whispered knowledge into Odin's ear. Although neither are very bright.
• Nice Job Fixing It, Villain: "Goyles, Goyles, Goyles" reveals that Huginn and Muninn accidentally destroyed Draxum's mutagen supply in their attempt to assist him in his battle with Lou Jitsu. The spilled mutagen not only created Splinter but delayed Draxum long enough for the turtles to grow and face him in the present.
• Out of Focus: They only show up once in Season 2 in "Goyles, Goyles, Goyles" (which headlines them), due to most of their interactions being tied to Draxum, who went into hiding after Season 1, and later became allied with the heroes, and never appear again afterward.

Meat Sweats

Voiced by: John Lydon (English), Miguel Ángel Ghigliazza (Latin American Spanish)

A former celebrity chef named Rupert Swaggart until he was bitten by an oozesquito and mutated into a pig, Meat Sweats would like nothing more than to have the turtles for dinner... literally.

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• Assimilation Backfire: This happens with him in "Nothing But Truffle" twice.
  • Absorbing Todd's unique skill backfired on him and made him a nice and friendly person.
  • And finally absorbing the Were-Tree gives him a weakness to silver, even with the advantages.
• As Long as It Sounds Foreign: Meat Sweats talks with an accent that tends to fluctuate with each line. Typically, he sounds like an odd mix between Irish and German, but he also has a tendency to switch to British, French, and at one point even begins speaking like a pirate.
• Bizarre Alien Limbs: Those gloves he wears actually cover up the fact that he doesn't have any real hands anymore. When he removes them, his arm splits into several tentacles, which can be used to grab things like normal hands or absorb the energy of whatever he touches (as well as taste it, apparently).
• Character Catchphrase: "Unleash the flavor!"
• Embarrassing First Name: Splinter considers his this.
  Splinter: You name is "Meat Sweats"?!
  Meat Sweats: Well, actually, it's Rupert.
  Splinter: (shudders) I would stick with Meat Sweats.
• Energy Absorption: His main ability as a mutant. He can absorb the energy and special abilities of any mutant (and presumably human) he touches if he can hold them long enough.
• Even Evil Has Standards: He's somewhat taken aback by the news that Splinter stole from his own sons, although judging by his tone it could've just been his idea of a humorous comment.
  • He is also shown to be concerned about crashing a civilian when Splinter speeds his vehicle.
• Evil Chef: He's a villainous former celebrity chef whose gimmick is cooking and eating mutants.
• Gluttonous Pig: Probably purposefully invoked. Doesn't help that he's also a chef.
• I Am a Humanitarian: Does not have a problem eating other mutants or porkchops for that matter.
• I Just Want to Be Normal: Or returned to his old appearance, at least. He doesn't seem to mind the benefits his mutant form offers (increased strength and the ability to absorbs others' powers), but in Cloak and Swaggart he is quite distressed when he loses his human appearance once again. He also seems to miss being the host of his cooking show.
• Know When to Fold 'Em: After having his truck damaged and being forced to release his mutant catches, he throws Splinter off, deciding that no meal is worth this.
• No Celebrities Were Harmed: Seems to be based on Gordon Ramsey.
• Power Copying: He can absorb the life of other mutants, and steal their powers.
• Supreme Chef: He was a celebrity chef as a human, and characters who've eaten his cooking rave about how delicious it tastes. His poisoned pizza puffs in their title episode practically fall under Impossibly Delicious Food considering everyone who gets a taste keeps attempting to eat them, even after being told that they're poisoned.
• Villainous Glutton: Doubles as a Fat Bastard.
  Splinter:

Repo Mantis

Voiced by: Fred Tatasciore''' (English), Oscar Garibay (Latin American Spanish)

A junkyard owner who was mutated into a mantis, he now makes a living repossessing and scrapping vehicles.

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• Even Evil Has Loved Ones: Even though he’s a greedy, selfish jerk, he loves his pet cat, Mrs. Nubbins, even continuing to take care of her after she turns into a huge mutant and starts trying to eat his head.
• Greaser Delinquents: He dresses the part with a leather jacket and slick pompadour.
• Greed: His main character trait.
• Hidden Depths: He has a love for cats. He even keeps taking care of his cat after she mutates and starts wanting to eat him, despite how dangerous the task of just feeding her can be.
• Jerkass: While he loves his cat, he's not a nice person, such as refusing to honor his part of Donnie and Mikey's deal despite them accomplishing their part in "Repo Mantis", and attempts to repossess an old woman's oxygen tank in "Evil League of Mutants".
• Kick the Dog: His recruitment alongside the more overtly villainous Meat Sweats and Hypno-Potamus is prefaced by him trying to repossess the breathing tank of an old lady, showing that he can be just as dastardly as the other mutants Draxum conscripted.
• Money Fetish: Gets very excited at the idea of a couple rich guys (Donnie and Mikey in disguise) buying his junk, to the point he almost sold his whole junkyard because they talked up their wealth so much.
• No Sympathy: He’s a stereotypically merciless repo man. He once tried to repossess an old lady’s oxygen tank.
• Ridiculous Repossession: He tries to repossess an oxygen tank, and it was mentioned that he once repossessed a birthday cake.
• Secondary Color Nemesis: He’s a villain with purple skin and green eyes.
• Slaying Mantis: Not afraid to use his sickles.
• Wingding Eyes: Has dollar signs for eyes at one point when he thinks Donnie and Mikey are a couple of rich customers who literally have cash to burn.

Warren Stone

Voiced by: John Michael Higgins (English), Roberto Molina (Latin American Spanish)

A newscaster who was mutated into a worm and lost his fame, he fancies himself as the turtle's greatest nemesis, but the Turtles (and almost everyone else) have no idea who he is.

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• A Day in the Limelight: His debut episode features him as the main character.
• Ambiguously Gay: Is all but stated to be in a romantic relationship with Hypno-Potamus.
• Blessed with Suck: His mutation gave him a stupidly slow Healing Factor while shrinking him down to the size of a worm.
• Comically Missing the Point: When he witnessed a canon fire an air conditioner clean through a wall, he asked if it was safe for his HAIR to be fired out of the canon.
• Defeat Means Friendship: Earned Hypno-Potamus' respect and friendship after defeating him in Newsworthy.
• Exotic Eye Designs: His take the form of two red, scribble-like rectangles in yellow sclera.
• Fan Disservice: Good luck getting his buff form out of your head.
• Iron Butt Monkey: Every episode with him in it features him getting stepped on at the very least. He somehow always manages to shrug his injuries off.
• Irrational Hatred: He seemingly has no particular reason for considering the Turtles his arch-nemeses.
• Non-Mammalian Hair: Maintains his poofy blond 'do from his human days.
• Not-So-Harmless Villain: Seems to be becoming this as of Stuck On You, albeit still a huge Butt-Monkey. Unfortunately, he loses the gauntlet to Baron Draxum at the end of Warren & Hypno, Sitting in a Tree. So he's back to being harmless.
• Pint Sized Power House: He's this while wearing the enchanted gauntlet that is a part of Shredder's armor, which gives him Super-Strength and the ability to fire devastating energy blasts.
• The Right Hand of Doom: The disproportionately large gauntlet he wears, which gives him an equally disproportionately large and muscular arm.
• Running Gag: He’s literally an insignificant worm that almost everyone, including his self-proclaimed enemies, don’t even know who he is or remember his name.
• Small Name, Big Ego: Considers himself the turtles' greatest nemesis, but they barely even notice him, let alone remember him.
• The Only One Allowed to Defeat You: He won't allow anyone else to destroy the Turtles but him, which is why he saves them from Hypno-Potamus in his debut episode.
• Unknown Rival: Not only to the turtles, but as he considers himself their greatest nemesis, he clashes with other villains who target them. April is the only person who takes him seriously (as his number one fangirl).
• Villainous Rescue: He saved the Turtles from Hypno-Potamus, because he believes he deserves to defeat them.

Hypno-Potamus

Voiced by: Rhys Darby (English), Erick Salinas (Latin American Spanish)

A magician formerly named Mezmer-ron who was mutated into a hippo by an oozequito bite. He has the ability to control his magic gimmicks with telekinesis and can hypnotize anyone (himself included) with ease.

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• Affably Evil: He's a polite and well-mannered villain towards the Turtles and rather friendly with his fellow villains, especially Warren.
• Ambiguously Bi: His relationship with Warren is all but stated to be romantic, they even refer to their relationship as "complicated". He was also completely taken in by Mikey's female hippo disguise.
• Angry, Angry Hippos: A former stage magician turned massive humanoid hippopotamus and a talented criminal.
• Battle Cry: Mezmer-ROO!
• Combat Pragmatist: Some villains might take a hypnotized opponent and put them in a cell or death trap. Mezmer-Ron? Just as likely to cut the heads off his enemies while they're in an entranced state.
• Even Evil Has Loved Ones:
  • As a human, he was close to his pet hippo, Doug, and he wishes to resurrect him.
  • Likewise, he genuinely cares for Warren, his best friend/roommate/it's complicated.
• Hypno Ray: Courtesy of his voice; it seems magical in nature and can even keep his targets suspended mid-air.
• Magic Knight: In addition to having the strength and murderous deadliness of a hippo, he still has all his magical abilities, some of which have been amplified by his mutation.
• Superpower Lottery: His mutation made him big, strong, fast, and tough, which contrasts sharply with Warren Stone in the episode they both premiered in, whose mutation gave him none of those qualities.
• Unexplained Recovery: His exploding hats in “Hypno! Part Deux” are said to make anything disappear forever and he is caught in the explosion of all his hats, but returns "Stuck on You" with no explanation.

The Foot Clan

The Shredder

"You are no match for The Shredder!"

Voiced by: Hoon Lee

The true leader of the Foot Clan. A set of cursed demonic armor brought to malevolent life, it's as powerful as it is vicious.

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• Actor Allusion: He is voiced by Hoon Lee, the voice actor of Master Splinter in the 2012 series, who in that show was also Karai's biological father whom she swore to destroy... and she also swore to destroy The Shredder in that show too, making it a two-fold reference.
• Adaptational Abomination: Downplayed. The Shredder in other incarnations is generally human, but in this series is a demonic set of armor that devoured the wearer and their soul.
• Adaptational Badass: In other incarnations, Shredder is merely very proficient at combat, albeit usually at a greater skill level than the Turtles. This incarnation, however, is literally a destructive demon that the Turtles have significant difficulty battling in their first real fight against him, often because he just gets back up after a heavy hit. In most incarnations, Splinter alone is a worthy adversary to the Shredder, but in this case not even Splinter and the Turtles together (along with April and Draxum), even empowered with mystic weapons this time, are capable of holding him back for more than a few minutes and find it nearly impossible to actually hurt him. He's shown being able to level buildings with the sheer air pressure of his blows alone, let alone when they connect.
• Adaptational Dumbass: While this series' incarnation is one of the most powerful incarnations in the franchise, he noticeably tends to use very little strategy in favor of completely overwhelming his opponents with brute strength in fights, whereas most incarnations of Shredder are well-practiced martial artists.
• Adaptational Heroism: Oroku Saki was actually a good man who only became the Shredder after making a deal with a demon so he could defend his village, and it's implied that this version is trapped in his own body, and leaves the heroes on peaceful terms after the Shredder is defeated.
• Adaptational Late Appearance: Downplayed. In the comics and prior adaptations, the Shredder is generally introduced in the same story or episode the Turtles are. In this show, he's initially only hinted to exist and confirmed to be real in "Shadow of Evil", which takes place around the middle of Season 1, with the plot being about stopping his armor from being completed.
• Adaptational Nonsapience: Shredder acts like a raging animal with no intelligence, though the legends imply that he wasn't always this way. He regains his sapience at the end of "E-Turtle Sunshine of the Spotless Mind".
• Adaptational Sympathy: Oroku Saki's reasons for becoming the Shredder vary across continuities, but is generally an identity he adopts to become feared. In Rise, Oroku Saki became Shredder out of a desperate attempt to protect his Clan, only for his soul to be devoured by the armor.
• Adaptation Species Change: Shredder is almost always a human, but this version is a demon taking the appearance of a suit of armor.
• Ancient Evil: He's been dormant for hundreds of years due to his armor being broken apart.
• And I Must Scream: It's implied at the end of "Shreddy or Not" that the good man Oroku Saki still exists, but his will is buried under the evil armor, and is ultimately freed by the end of "Rise".
• Animated Armor: Is a demonic set of armor that gained life after consuming his wearer.
• Archnemesis Dad: In very technical terms. The body he possessed and eventually consumed is that of Karai's father.
• Attack Animal: Thanks to a mind control collar, he effectively became this to Big Mama, who restyled him as her Battle Nexus champion and main muscle. Then the Foot Recruit gets control of him in "Battle Nexus: New York".
• Bad Boss: In the series finale, once he reattains his sentience, he initially only shows mild annoyance at the antics of his three henchmen, but once Foot Lieutenant and Foot Brute get stuck under rubble, he tells Foot Recruit to abandon them.
• Big Bad: After spending much of the series as the Greater-Scope Villain, he steps into the role fulltime by the second season, but spends much of it as a mindless, raging brute. Upon regaining his sentience, he becomes the True Final Boss of the series.
• Came Back Wrong: When he's fully brought back, he behaves more like a wild animal rather than someone you'd expect to be the leader of an evil ninja clan. Several characters make note of this, suspecting something went wrong during his resurrection. His physical form is also in flux, constantly phasing in and out of reality. It turns out to be due to missing his will, due to it being sealed away in another dimension. His sapience is restored in "E-Turtle Sunshine of the Spotless Mind" after his will is released from the Twilight Realm.
• Casting a Shadow: While under Big Mama's command, his Shadow Fiend-form is able to move through shadows and summon shadow arms to kidnap contestants for her Battle Nexus.
• Clipped-Wing Angel: He's still plenty powerful when he's brought back, but his mind has apparently regressed to a feral beast, and he constantly phases in and out of reality, keeping him from delivering the finishing blow to the turtles time and again.
• Composite Character: He's a demonic entity and resembles the 2003 Demon Shredder's original Tengu form, but the Foot Clan serves under him, much like traditional incarnations, which the Demon Shredder notably lacked beyond his Mystics (who were acquired by the Foot Clan the Utrom Shredder set up later in the timeline), and sports the 1987 Shredder's purple colors. His larger size also gives him a resemblance to Super Shredder. The series finale also reveals his armor was created by an alien being, giving him elements of Ch'rell.
• Contrasting Sequel Antagonist: Unlike Baron Draxum and Big Mama, both of whom had extensive resources, relied upon henchmen or allies, and were usually content to play the long game. The Shredder, by the final arc of the series, and the one where he takes center stage, has very few henchmen to rely upon, is more likely to fight on the front lines, and is very proactive in getting to his plans.
• Deal with the Devil: He made a deal with a demon to transform him into the Shredder in order to defend the village. What he didn't know was that the process would corrupt his very soul.
• Drama-Preserving Handicap: In his first appearance, he's constantly phasing in and out of reality at random intervals, which is good news for the Turtles, since every encounter with him is an utter Curb-Stomp Battle. The Shredder phasing out of reality in the middle of their first encounter was the only thing stopping him from slaughtering them all on the spot. Then he regains his sapience in "E-Turtle The Spotless Mind".
• The Dreaded: Just seeing the Foot Clan's sigil makes Splinter get off of his butt to try to stop Shredder's armor from being completed. As soon as the heroes realize that they've been fighting the Shredder in "Battle Nexus: New York", Splinter almost immediately commands everyone to retreat.
• Evil Sounds Deep: His roars and chuckles have a noticeably bass-y reverb to them. His actual speaking voice is actually slightly higher-pitched, but still retains the reverb.
• Fallen Hero: Oroku Saki used to be a good man in this continuity until the armor corrupts him into what he is now.
• Flash Step: He seems to have gained (or perhaps regained) the ability to do this some time before "Battle Nexus: New York".
• Greater-Scope Villain: He's the master of the Foot Clan, as well as an Ancient Evil that even Master Splinter treats with the upmost seriousness, and stopping the Foot from reassembling his armor is a major plot point of the season.
• Hate Sink: Upon regaining his sapience, the Shredder is firmly established to be a destructive murderer whose only concern is becoming invincible so he can continue his killing spree, he's completely willing to throw away the lives of his henchmen (which significantly shakes the Foot Recruit's faith in him), and sees everyone as beneath him. Oroku Saki, however, is not this trope, being an otherwise decent person who was pushed into a desperate situation, with the Shredder being a distinct entity.
• Hopeless Boss Fight: The Turtles' first fight against him doesn't go very well in "Many Unhappy Returns", as despite the Shredder being effectively a wild animal, the gap between him and the Turtles is so large that the Turtles are forced to call in outside help to detain rather than outright defeat him. Their rematches against him in "Battle Nexus: New York" and "Shreddy or Not" fare even worse, with the Turtles being forced to retreat in both, the latter one after he destroys all of their weapons. They don't make any significant progress in even hurting him until they unlock their Hamato Ninpo, and even then barely eke out a victory thanks to combining their powers and getting the help of the spirits of the Hamato Clan in "Rise".
• Humanoid Abomination: The Shredder has a humanoid shape, but is capable of inhumanly powerful feats such as cutting buildings with just the aftermath of swinging his arm, and shows some Size Shifting capabilities in the final battle, making him resemble a flaming Energy Being.
• Implacable Man: In "Many Unhappy Returns", no matter what the Turtles throw at him, they don't slow him down. It takes them discovering he's ticklish, can be blinded, and that he's attracted to sudden, bright flashes of light for them to gain any sort of advantage. When he returns in "Battle Nexus: New York", the combined efforts of eight fighters only serve to distract him slightly. It's only after getting cut in half by one large Combination Attack from the entire Hamato Clan that he finally goes down for good.
• In the Hood: He wears a long hooded cloak while under Big Mama's control as the "Shadow Fiend".
• The Juggernaut: This incarnation of Shredder is a powerhouse who raw power is unmatched and allows him to effortlessly overpower the turtles on several occasions. It takes everything and more for the heroes to finally defeat him in the finale.
• Jump Scare: Any time anything related to his armor appears on screen in season 1, a sudden and brief flash of The Shredder's demonic face flashes on screen and gives a hoarse roar to indicate that Shredder is far more terrifying and dangerous than any other villain seen thus far. Season 1 also closes on one that could very feasibly be Shredder actually roaring at the heroes.
• Knight of Cerebus: The very first episode he's directly mentioned in is noticeably more serious, and rife with frightening, almost Jump Scare level imagery showing the level of Shredder's atrocities, with even the villains being much more direct than usual (barring a brief relapse from the Foot Lieutenant and Foot Brute). His first real appearance in the series, while playing him a bit more for humor due to comedic weaknesses, shows him as a threat that is so outside of the Turtles' league that he very likely would have killed them if he wasn't phasing in and out of reality. Once the Shredder's will is restored, he proceeds to cause the show's Darkest Hour.
• Magic from Technology: A flashback in the second part of the season 2 finale strongly implies that the Shredder's armour was created and given to Oroku Saki by an alien being (misinterpreted as a demonic oni) centuries ago, and is therefore advanced alien technology.
• Man Bites Man: He tries to use his razor sharp teeth to attack his opponents at multiple points, he still does this even after he regains his intelligence.
• Mechanical Abomination: The series finale heavily implies he's a suit of armor made from alien technology, and his shapeshifting abilities heavily involve transforming his body into metallic tools or weapons.
• Mythology Gag:
  • This isn't the first time Shredder's been portrayed as a demonic entity, with the original in the 2003 incarnation being as such, and the armor in this incarnation looks very similar to that of the Tengu Shredder's original form. He also has other numerous stylistic similarities to the incarnations from that series, such as his glowing pink eyes that evoke the red eyes from the 2003 version, the three-pronged crest on his helmet resembles that series' Foot Clan sigil, and his voice is edited to reverberate like that series' bearers of the identity.
  • Like in the 2012 series' Season 5 Kavaxas Arc, this version of the Shredder was turned into a monster, then separated into scattered pieces that was put back together by a cult-like remnant of the Foot Clan and a villainous ally that plans on using the revived Shredder for his own nefarious plot. Like in that arc, the Shredder Came Back Wrong and ultimately led to the Foot Clan being destroyed once and for all.
  • While the Shredder's signature steel claws are otherwise phased out of this continuity, he briefly creates them a few times in the series finale in close range scuffles.
• No-Nonsense Nemesis: After regaining his sentience, he immediately decides to try and kill Karai in her weakened state due to her having defeated him before, and ignores anything that could distract him from becoming invincible. When the Turtles fight him to protect Karai, he destroys their mystic weapons to make fighting him much more difficult and almost kills every one of them, the Turtles only managing to escape due to the efforts of Karai, Splinter, and Draxum.
• Not Himself: He behaves more like a rabid beast than an evil warlord when he's brought back to life. Multiple characters make note of how this behavior isn't in line with the legends. It's revealed to be a result of his will being sealed in the Twilight Realm, which is released at the end of "E-Turtle Sunshine of the Spotless Mind".
• Pulling Themselves Together: No mortal weapon can pierce his armour, although some mystic weapons can. It's not much better though, since pieces of Shredder's armour that crack or break off almost instantly reconnect themselves.
• Razor Wind: When fought in "Battle Nexus: New York", he takes a swing at Draxum that he just barely dodges. The shockwave from said swing cuts all of the surrounding buildings in half.
• Real After All: Splinter thought that the Shredder's legend was just a story.
• Related in the Adaptation: This version of Oroku Saki is a distant ancestor of Splinter/Hamato Yoshi and the Turtles, as the Hamato clan was founded by his daughter Karai.
• Sealed Evil in a Six Pack: After his first defeat, the armor that contained his soul and power was scattered across the world (though a handful found their way into New York). He's then revived when the Foot manages to put them back together.
• Sealed Inside a Person-Shaped Can: Downplayed. While his body can move, it lacks his will and is a wild animal. In "E-Turtle Sunshine of the Spotless Mind", once Karai is released, Shredder's will, sealed away in the Twilight Realm, returns to his body.
• Shapeshifter Weapon: He can turn his body into a variety of tools or weapons, such as drills or his iconic steel claws.
• Shout-Out: He turns into a large energy being resembling Tengen Toppa Gurren Lagann's Granzeboma, and frequently turns his hands into drills.
• Smug Super: His true personality is a combination of this and an Arrogant Kung-Fu Guy. He views everyone else, even his own followers, as completely beneath him, but considering just what it takes to put him down and his raw destructive power, he's got a lot to back up his mentality.
• Spikes of Doom: After he gets his sanity back he displays the ability to summon a field of metallic spike from the ground as a means of taking out multiple opponents at once.
• Suddenly Voiced: He finally speaks at the end of "E-Turtle Sunshine of the Spotless Mind", when he regains his sapience.
• Unskilled, but Strong: Whether he's a mindless animal or sapient, he shows very little finesse or strategic ability while fighting. This weakness is offset by his obscene strength (enough that he can cut buildings and destroy most of Big Mama's tower with just the air pressure of his blows) and durability, to the point eight people fighting against him in "Battle Nexus: New York", many of them being exceptional martial artists, are the ones at a disadvantage.
• Vile Villain, Laughable Lackey: Upon becoming sapient, most of the humor and levity comes from Foot Recruit, Foot Lieutenant, and Foot Brute's interactions with him, with the Shredder himself being a despicable, no-nonsense monster.
• Villainous Breakdown: Implied. After Casey betrays him and he loses his chance to consume Splinter's essence, his intent seems to shift to simply killing the Hamato Clan outright, to the point of turning into a much stronger form to overpower and demoralize them after they join their mystic powers together for one powerful attack. When the Hamato Clan regains the advantage through the help of the spirits of their ancestors, all he can do is shout the word "NO!"
• Vocal Dissonance: When he regains the capacity for speech, his voice turns out to be fairly normal sounding despite it coming from a hulking, monstrous suit of armor.
• The Voiceless: Coinciding with his mental regression into a mindless beast, he doesn't speak. All he does is roar, growl, and let out the occasional evil chuckle. He finally speaks in the four part series finale.
• Was Once a Man: Oroku Saki was once a regular man until a demon corrupted his soul and transformed him into the Shredder.
• Weaksauce Weakness: As it turns out, he's ticklish in the back of the knees. He's also left completely disoriented and open whenever he's blinded. Finally, he's single-mindedly attracted to and distracted by flashing bright lights. All three discovered weaknesses are used to successfully restrain him with Big Mama's collar. These weaknesses don't come up in any of his subsequent fights, however.

The Foot Clan

Foot Brute Voiced by: Maurice LaMarche (English), David Allende (Latin American Spanish)
Foot Lieutenant Voiced by: Rob Paulsen (English), Daniel Lacy (Latin American Spanish)

The Foot Clan are a group of evil ninjas bent on taking over New York City! They have the power of teleportation through hidden gateways and the ability to create and control Origami Ninjas.

The known members include a short man credited as "Lieutenant", a large man credited as "Brute", and later on a female recruit (who has a separate entry).

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• Ancient Artifact: They spend the first season scouring New York for powerful artifacts, including a power gauntlet. It's eventually revealed that the artifacts in question are pieces of the Shredder's armor.
• Adaptation Deviation: While previous incarnations of the Foot Clan had dabbled with magic, this one is much more heavily tied to the supernatural, and are essentially a cult devoted to the Shredder.
• Ambiguously Human: Despite the Foot Clan usually being human, the both the Lieutenant and the Brute are extremely odd looking, having purple skin and creepy facial features. Both Lieutenant and Brute have question marks on the human entry of their official bios. It doesn't help that their master, The Shredder, is a demonic set of Animated Armor in this continuity.
• Arch-Enemy: Although things are different in this continuity, the Foot Clan as a whole remain this to the Hamato Clan, the Turtles especially, by being their most recurring foes and involved in many major events like the return of The Shredder and the Krang invasion. They even team up with Baron Draxum under the mutual assurance they'll defeat the Turtles together.
• Bald of Evil: Not a hair on either of their evil heads.
• Big Bad Wannabe: They're responsible for most of the major conflicts of the series, from manipulating Draxum into releasing the Shredder and later personally freeing the Krang, but tend to find themselves on the receiving end of Evil Is Not a Toy in these plots.
• Body Horror: The Krang mutate them into monsters to turn them into stronger minions.
• Brains and Brawn: The Lieutenant is the brain to the Brute's brawn.
• Bullying a Dragon: While they were in their rights following the rules of the organization, treating Baron Draxum in a demeaning manner as opposed to an equal partner was a big mistake on their part, especially after he used those same rules to usurp control of the Foot Clan from them. They do get one over Draxum in the end though, manipulating him into resurrecting the Shredder for them.
• Cult: The group worships and makes a goal of resurrecting the Shredder. The Movie reveals that the group also worship the Krang.
• Composite Character: The organization appears to take after different versions of the Foot Clan across different incarnations; they're a ninja group as per usual, but the Ambiguously Human nature of the main enforcers and cult-like nature are respectively similar to the Foot Mystics from the 2003 cartoon, and the Foot cult from Season 5 of the 2012 cartoon, with the same goal as both; resurrection of the Shredder.
• Co-Dragons: For the Shredder. The Lieutenant and Brute appear to be of equal standing with their only authority being over the Recruit and the Origami Ninjas. They later become Baron Draxum's when he usurps control of the clan.
• Dragon with an Agenda: Despite Draxum forcing them to yield to his authority, they still plan to bring back the Shredder and successfully manipulate him into putting the armor on, reviving their master.
• Early-Installment Weirdness: The Foot Lieutenant and Foot Brute's ability to create Origami Foot Soldiers is largely dropped midway through Season 1 in favor of flesh-and-blood soldiers, and they never do it in Season 2 (albeit largely due to not showing up until the final episodes).
• Evil Duo: They're always causing trouble together.
• Evil Is Petty: In "Mystic Library", once they see the Turtles are at the titular location, decide to interfere with whatever they're doing for no other reason except revenge for frequently being defeated.
• Evil Sounds Raspy: The Foot Lieutenant speaks in a raspy whisper that sounds like the result of a lifetime gargling sharp pebbles.
• Eyes Always Shut: The Brute has eyes, they're just not visible most of the time.
• Fat and Skinny: The Foot Brute is built like a monster truck, and is at least four times wider than the Lieutenant.
• Glass Cannon: The Origami soldiers are strong enough to knock Raph clear across the room, but are about as durable as you'd expect for beings made out of paper.
• The Heavy: With the Shredder gone, the Foot Clan spend much of Season 1 moving heaven and earth to resurrect him.
• Irony:
  • They are big fans of Lou Jitsu but they are unaware that he's actually the last living descendant of their ancient enemies, the Hamato clan.
  • The Foot Clan's descent into evil was inadvertently caused by Oroku Saki trying to prevent it from being wiped out. Now the Foot Clan is effectively a cult that worships the Shredder, who will wipe out humanity if left unchecked.
• Hidden Agenda Villain: They're looking for artifacts for an unspecified reason. "The Longest Fight" ends with them stealing some sort of sharp gauntlet (with the Turtles thinking they just tried to steal what they call a "puny ring"), and they attempt to steal a similar gauntlet in "Stuck on You". "Shadow of Evil" sets the record straight, revealing that they're acquiring pieces of the Shredder's armor to resurrect him.
• Logical Weakness: Their Origami soldiers are naturally pretty fragile, and water easily destroys them, and also renders them unable to create more.
• Manipulative Bastard: They offer Draxum the Shredder armor in exchange for his assistance in tracking down the pieces, conveniently omitting the fact that the armor would drain his life force to reanimate itself.
• Mook Maker: The Lieutenant is adept at origami, which allows him to deploy several Soldiers at once.
• No Name Given: They're credited as the "Foot Lieutenant" and "Foot Brute", with no hint to their real names given.
• Not So Above It All: The Lieutenant and Brute are fans of the Lou Jitsu movies, with the former, generally the smarter and more serious of the two, gushing about the films in "Hot Soup: The Game" alongside the Brute. "End Game" shows this extends to them being so awed by Splinter, a transformed Lou Jitsu, clobbering their minions that they forget to dodge his attack.
• Not-So-Harmless Villain: They often banter with one another, frequently engage in various mundane activities and will gush about Lou Jitsu but they are also fairly competent fighters in their own right and they successfully manipulate Draxum into wearing the life draining Shredder armor so as to resurrect their demonic master.
• Paper Master: They can bring their Origami soldiers to life as this series' incarnation of the Foot Soldiers.
• Power Tattoo: They have an orange foot tattoo on their faces that appear to emit flames. It's apparently part of being elevated to full clan status and is received via getting kicked in the face by a high-ranking member of the clan.
• The Rival: The Foot Brute acts as this to Raphael in their battles and in the opening.
• Shoo Out the Clowns: Shredder leaves the Foot Lieutenant and Foot Brute for dead under rubble in the series finale, which both sidelines the humor in favor of focusing on the urgency of defeating the Shredder, and instigates the Foot Recruit's Heel–Face Turn.
• What Happened to the Mouse?: Whether the Foot Clan members were reverted to being human or whatever Lieutenant and Brute are after the events of The Movie isn't made clear.
• Zerg Rush: Their Origami Soldiers aren't very tough, but make up for it with sheer abundance.

Foot Recruit

Voiced by: Zelda Williams (English), Pamela Cruz (Latin American Spanish)

A young woman who very desperately wants to become a full member of the Foot.

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• Adaptational Villainy: Unlike previous iterations of Casey Jones, who's an ally of the Turtles from the start, this version is a fanatic follower of the Foot Clan and a recurring villain up until her Heel–Face Turn in the finale.
• Badass Normal: Usually fights unarmed against the superhumanly strong heroes, and without access to the supernatural powers of her senior officers.
• Blood Knight: The Recruit's predilection towards violence is so intense that the Lieutenant and Brute actually show some concern towards her.
• Boyish Short Hair: Her hair is cut very short, and there's very little that's feminine about her.
• Canon Character All Along: "Rise" reveals that she's indeed this show's version of Casey Jones. The present day version, to be more specific.
• Child Prodigy: She was apparently accepted into every clan she applied to as a child.
• Child Soldier: She's apparently been training with the Foot since she was seven.
• The Comically Serious: She reacts to every situation with the same bombastic intensity she always has, even if she's just doing something mundane like going on a coffee run for her bosses.
• Composite Character: You would be forgiven in thinking that she was this series' version of Karai, being a Dark Action Girl that runs the Foot Clan when the Shredder isn't and has a love/hate relationship with the turtles, but the series finale reveals that she's actually one of this series' incarnations of Casey Jones.
• Dark Action Girl: The Recruit is just as deadly as her two superiors, being just as capable of keeping up with the Turtles. She becomes a more straightforward one after her Heel–Face Turn.
• Decomposite Character: She's basically all of Karai's more villainous attributes (a ruthless Foot Clan kunoichi with a love/hate relationship with the turtles) rolled into a separate character despite being the show's first version of Casey Jones, this show's version of Karai being a total force for good.
• The Dragon: Despite being lower on the totem pole than the Lieutenant and Brute, she winds up becoming the Shredder's in the finale, before undergoing a Heel–Face Turn.
• Dude, Where's My Respect?: She expresses frustration when a group of Foot initiates are promoted to full membership while she gets passed over, despite her being there longer than any of them.
• Even Evil Has Standards: She's completely unnerved by the Shredder's command to just abandon the Foot Brute and Foot Lieutenant in the rubble, which contributes to her Heel–Face Turn.
• Evil Counterpart:
  • Similar to April in how she's a passionate tertiary member of a group of ninjas... Except evil. Splinter himself compares the two in "Always Be Brownies", albeit without explicitly naming April.
  • She's also positioned as one to Mikey in her debut episode. Both are sensitive to criticism and hopeful to prove themselves to their teammates... but she lashes out far more intensely than Mikey.
• Evil Gloating: Has a bad habit of standing still and laughing at her enemies whenever she's winning in a fight, which just allows her opponents to turn the tables on her.
• Foreshadowing: Toward her true identity:
  • In "Always Be Brownies", the Girl Scout organization she runs is called "Grandma CJ", and there's sports equipment in her room, which hints that she's actually Casey Jones.
  • In "Battle Nexus: New York", she fights alongside the Turtles against the Shadowfiend, prominently using April's baseball bat which she threw to her. Baseball bats are one of Casey Jones' staple weapons, and the fact she fights with the Turtles is hinting at her redemption.
• Gender Flip: Downplayed. There are two Casey Jones incarnations: she's the show's present day incarnation, while a son of hers resides in the Bad Future.
• Girl Scouts Are Evil: In "Always be Brownies", she somehow ends up founding and running an organization analogous to the Girl Scouts with the intention of taking over the world through bake sales. The members of her organization, who are preteen girls at most, are all trained in ninjutsu, including bladed weapons.
• Given Name Reveal: In "Rise", she quits the Foot Clan and reveals her name in a rather dramatic fashion:
  "The name's Cassandra, Cassandra Jones!"
• Heel–Face Turn: After seeing the full extent of Shredder's cruelty, Foot Recruit decides to turn on him and join the good guys.
• Hero of Another Story: At the end of The Movie she texts April a series of selfies that show her fighting the Krang invasion on her own.
• Hidden Depths: "Always Be Brownies" has her running a successful Girl Scouts-esque organization, with the end of the episode suggesting that she also engages in sports, due to sports equipment being able to be spotted in her room. The latter turns out to be a hint that she's really (a) Casey Jones.
• Irony: She angrily tells Big Mama in "Battle Nexus: New York" that she enslaved her master, the Shredder. However, Shredder was so insane, she had to keep him under the same control to serve him in the long term.
• Large Ham: She spends a lot of her screentime gesturing dramatically while shouting.
  The Recruit: (as she jumps off a building) "FOOT CLAAAAN!"
• No Indoor Voice: There's rarely a moment where she isn't shouting.
• No Name Given: Is simply credited as "The Foot Recruit" in and out of universe, and eventually even that's shortened down. It's revealed that her name is Casey Jones.
• Not So Above It All: Just like her bosses, the Recruit isn't above goofy behavior. During her fight with Raphael during "Insane in the Mama Train" she even gets locked in a prolonged "bring it on"-off and knocks his hand off course so he uses the train's transport system to jump to the wrong room with a mischievous smirk.
• Not-So-Harmless Villain: Becomes a lot less funny and a lot more threatening once she gets control of the Shredder.
  I'd run, if I were you.
• O.O.C. Is Serious Business:
  • In "Battle Nexus: New York", she talks much more quietly to Big Mama after taking control of the Shredder and preventing her escape.
  • After Shredder abandons his Lieutenant and Brute, she's so shaken by it that she doesn't speak bombastically, even when trying to deny that she's having second thoughts about being the Shredder's General. She only starts acting more like herself after saving Splinter's life.
• Suddenly Shouting: She has a tendency to start speaking normally before abruptly yelling at the top of her lungs
  The Recruit: I shall return. STAY HERE AND DO NOTHING!
• Tomboyish Name: She shares the same first name as her male counterpart, though in this case, it's short for "Cassandra".
• Undying Loyalty: The Recruit is fanatically loyal to the Lieutenant and Brute, blindly obeying any order they give her, until she clashes with them over controlling Shedder when she wants to set him free. She ultimately turns on the Foot after witnessing The Shredder's cruelty even to them.

The Krang (UNMARKED SPOILERS)

From left to right: Krang Three, Krang One, Krang Two

Voiced by: Jim Pirri (Krang One), Toks Olagundoye (Krang Two)

Creatures that the Foot Clan worshipped who turn out to be alien invaders. The main villains of Rise of the Teenage Mutant Ninja Turtles: The Movie.

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• Adaptational Abomination: Krang is typically depicted as an alien invader with no greater abilities beyond more advanced technology. In Rise, however, the Krang are able to spread bio-mass that can infect people and convert them into more Krang, can nullify the Turtles' mystic powers, and are so beyond the Turtles' abilities that Krang One is able to counter one of their strongest attacks with just the air pressure from a flick.
• Adaptational Badass: Whenever the Krang have been depicted as a species in previous continuities, they were pretty much dependent on their technology to make them anything resembling a threat. The Krang here are positively vicious even in their base form, delivering a Curb-Stomp Battle to the Turtles when they first reemerge, with Krang One in particular being an outright Invincible Villain and remains undefeated through the entire movie's runtime, the Turtles resorting to having to stall him to make sure the invasion fails.
• Adaptational Late Appearance: Krang in prior incarnations showed up in the second episode of the 1987 cartoon, and is established from the get-go to be one of the primary antagonists of the 2012 cartoon. In Rise, the Krang formally appear in the movie, which takes place after the end of the second season, though the group are also heavily hinted to exist in said season.
• Adaptational Seriousness: Prior incarnations of Krang are generally humorous, with even the 2012 character (who was reimagined as an emotionless hive mind) demonstrating a number of comedic beats. The Krang in this incarnation have far less comedic personalities, and are rarely played for jokes beyond a comment about Krang Two's shallow characterization and some slapstick (such as Krang Two getting a book thrown in her face).
• Adaptational Ugliness: Krang's exosuits across incarnations tend to look and be very humanoid, with varying degrees of mechanical complexity. The Krang's exosuits in Rise, however, look far more monstrous and organic.
• Always Chaotic Evil: We only experience four Krang in the show; one dead and three alive. The alive examples immediately start turning people into mindless beasts and biomass with the intent of doing it to the rest of the planet with the Technodrome. The dead example turned the kind and compassionate Oroku Saki into a monster hell-bent on enslaving humanity.
• Ambiguous Situation: It's heavily implied that the reason there are only three Krang left is because the surviving three killed the rest after their prior invasion failed, but this is never outright confirmed in the film itself.
• Anti-Magic: Just by screaming at them, Krang One manages to completely nullify the Turtle's mystic powers.
• Arch-Enemy: Krang One becomes this to Leo. Since Krang One was the one who turned Raphael into a monster like the rest of the Foot Clan and Leo was responsible for sending him back to the prison dimension as well as ruining all his plans, the hate the two have for each other is mutual.
• The Assimilator: They conquer worlds by spreading Meat Moss over them, which twists organic life and technology alike into weapons under their control. There were presumably many of their species that could do this, but among the present three, only Krang Three is explicitly shown making use of this ability.
• Asskicking Leads to Leadership: Krang One speaks on the behalf of his species and is practically unstoppable in every one of his combat encounters. He doesn't even get handed a physical defeat. The best the Turtles could do was strand him in a separate dimension.
• Ax-Crazy: Krang Two is the most notable regarding this trait, with almost everything she says being about how she wants to kill something, though Krang One also showcases it, murdering the crews of two helicopters (one being a police chopper and the other a Channel 6 News chopper) despite neither posing much of a threat to him.
• Bad Boss: Krang Three assimilates the Foot Clan into their ranks right after Foot Lieutenant says that they'll be right behind the Krang in their efforts, the process of which looks very painful.
  Foot Lieutenant: We live to serve.
  Krang One: You will serve me, whether you live or not.
• The Bad Guy Wins: As future Leonardo lampshades it, the Krang practically won in the Bad Future where they take over the Earth and it's up to Casey to undo it by going back in time and prevent their invasion from happening in the first place.
• Big Bad: Krang One is the leader of the trio in their plans to conquer earth and subsequently the main threat of the movie.
• Clipped-Wing Angel: Splinter and Casey actually have an easier time fighting Krang Two in her suit than outside of it, as Krang Two ends up losing access to her Combat Tentacles while wearing it.
• Co-Dragons: Due to Krang One primarily taking upon a commander role, Krangs Two and Three share the role of his main subordinate, with Three evidently being the only one capable of spreading their assimilating biomass while Krang Two takes the role of "field" enforcer.
• Composite Character: Like the 2012 series, the Krang are a group of alien invaders who seek to turn the entire universe into an extension of themselves, with the size of them and their exosuits taken from that series' Kraang Prime, but the spelling of their name and straightforward dialogue are closer to the 1987 cartoon incarnation of the character, with their more serious characterization being similar to the 2003 series' Ch'rell, an evil Utrom who was very similar to Krang, with their exosuits bearing some resemblance to the black and red Utrominators and the exosuit used by the Shredder in "Same As It Never Was".
• Contrasting Sequel Antagonist: While the Krang are heavily implied to have created the Shredder and possibly the mystic underbelly of the whole planet, they're still very different in that they're full-on alien invaders in a series where almost every primary and secondary villain have been mystical. The Krang are also much more direct in their evil plans, not even bothering with going incognito like prior villains did, managing to conquer New York within hours just from overpowering their opposition.
• Dark Action Girl: Krang Two is positively giddy in her rampant bloodlust and desire to kill her opponents.
• Decomposite Character: The Krang are the name of an alien species in this incarnation, similar to the 2012 series, but the film has only three of them (due to the rest having died in imprisonment), making the result be Krang is split into multiple characters; Krang One being the central commander, Krang Two being the one who goes out to enforce his will, and Krang Three either adding more to their ranks via assimiliation or operating the Technodrome.
• The Dreaded: The Krang are such a dangerous threat that after the future Leonardo has concluded that the resistance have failed and he, Mikey, and Casey have no chance of winning against them, he asks Mikey to send Casey back in time to try and stop the invaders from arriving at all. In the present, the Turtles do not believe Casey's claims of being from the future until he mentions the Krang, whom Splinter has heard of and takes the idea of their invasion seriously.
• Eldritch Abomination: Possibly the straightest the Krang have ever played this. Their technology is completely organic and formed from their own biology, and they're driven to assimilate every planet they land on.
• Evil Counterpart: The Krang in general (and Krang One in particular) are a narrative parallel and contrast to Leo himself, in that both (mistakenly) view true strength as coming from one's singular capabilities. The main difference is that, while Leo's view of strength in this manner comes as a result of his inferiority complex and constant need to prove himself to his family (and his character arc in the film is about him overcoming this mindset), the Krang's view of strength stems from their belief that they are already inherently superior to everyone else.
• Eyes Do Not Belong There: Matter that the Krang assimilate have a tendency to grow eyes everywhere, which is somewhat ironic considering the Krang themselves only possess two eyes.
• Fatal Flaw: Krang One's is Pride. He looks at all other species as beneath him, causing him to make dangerous errors in judgment due to underestimating creatures he perceives as weaker than the Krang, both in the past and eventually millennia later, which results in both invasions ending in failure thanks to the Hamato Clan.
• Fate Worse than Death: Krang One gets trapped back in the prison dimension alone (with Krang Two being trapped on Earth and Krang Three likely dead due to the Technodrome's destruction), possibly forever.
• Final Boss: The Krang serve as the final threats that the Turtles must contend with, with Krang One being the last enemy the four face together.
• Flat Character: Krang Two is defined by her Ax-Crazy nature, with almost all of her dialogue being about how she wants to kill something. Splinter ends up complaining about her lack of depth when having to fight her.
• Greater-Scope Villain: The Foot Clan worships them, and it's heavily implied that the Foot Clan's champion, the Shredder, was created with their technology.
• Hero Killer: They manage to vaporize future Leonardo shortly after he sends Casey to the past and Krang One is dangerously close to finishing off the present one when the two are locked in the prison dimension. However, Leo's brothers are able to rescue him just in time and his death is undone.
• Invincible Villain: Krang One far outclasses anything the Turtles can throw at him, especially after he dons his Power Armor. The best they can do is strand him back to his prison dimension.
• Knight of Cerebus: After the Krang appear on Earth, the tone noticeably becomes much darker due to the Krang being stronger than everything the Turtles have fought before, even the Shredder, with the film almost going in a much more horror-oriented direction. They also prove to be the only enemy that the Turtles can't beat in a straight fight, which forces them to just make sure the invasion fails instead of defeat them outright.
• Lack of Empathy: Krang One doesn't feel sad for the near extinction of his race under the belief that they wouldn't have died if they weren't weak, and can't understand why the Turtles protect the human race despite being stronger than them.
• Lovecraftian Superpower: They are able to generate a grotesque Meat Moss from their bodies and mutate other living beings into horrifying monstrosities that obey their every whims, which in turn can do the same to anyone uninfected that they could get their claws on. The biomass they generate are also what makes up a majority of their technology.
• Made of Iron: Their bodies are apparently incredibly resistant to even bladed weapons, which they react to as though they were being hit with blunt objects. Krang Two notably doesn't die when April crushes her with a wrecking ball and continues to flail about while trapped under it. The only thing that seems to do permanent damage to them is experimental herbicide that April stole from a lab, and possibly the explosion created from the Technodrome's destruction, considering Krang Three disappears after that point.
• Might Makes Right: Krang One espouses that it is The Right of a Superior Species to conquer the universe and subjugate all other life, and since he sees the Krang as that Superior Species, it is therefor within his rights to terraform the Earth.
• Mythology Gag: Each incarnation resembles a prior incarnation of Krang or a character similar to him:
  • Krang One's rectangular shape is reminiscent of the 2003 series' Ch'rell, and has sharp looking "eyebrows".
  • Krang Two loses her eye in a fight with April, which is likely a reference to the prior series' Kraang Sub-Prime, that series' second-in-command of Kraang Prime, having a cybernetic eyepatch (though Krang Two loses her right eye while Sub-Prime lacks his left).
  • Krang Three resembles the 1987 incarnation of the original Krang, being smaller and more brain-like than his more octopus styled siblings.
• Never Heard That One Before: Krang One is amused when Raphael says that it's his duty to protect the human race, because other races they've fought and consumed spoke of it as well.
  Krang One: "Hm. You're more powerful than the people of this planet, yet, you defend them... Why?"
  Raphael: "It's my duty."
  Krang One: (chuckles) "A word used by the weak. Many planets before yours have spoken of 'duty'; they too have been consumed by the Krang."
• No Name Given: The Krang are not given separate official designations, and the credits just label them numerically in order of appearance. The most we get is Krang One referring to Two and Three as "sister" and "brother" respectively.
• Non-Standard Character Design: Krang One stands out among other depictions of Krang/Utroms, even compared to his siblings. He looks almost nothing like a brain, being much taller and rectangular in shape. He's also purple as opposed to pink.
• Not-So-Well-Intentioned Extremist: Krang One boasts that he and his siblings are out to restore the natural order of things, that the strong devour the weak, and that he's "saving" the Earth. No one ever buys it, especially since it's shown that the future of Earth is a hellish landscape littered with dead bodies that weren't even assimilated.
• Outside-Context Problem: The Krang are alien invaders in a series where a majority of the Rogues Gallery have magical powers, and with very few ways to effectively counter them beyond sealing them in another dimension or chemicals April found at Eastlaird University. They're also capable of outright disabling the Turtles' mystic powers, something that was largely only possible in the series when they lost their weapons.
• Organic Technology: To Donnie's disgust, their technology is created from them attaching their biomass to objects and then puppeting them around.
• Original Position Fallacy: Krang One believes that the weak exist to be devoured by the strong. Raphael manages to get under Krang One's skin by pointing out that he and his race were trapped in another dimension for millennia by people who they considered much weaker than them; Krang One's only defense is that it was a "rare misstep".
• Power Armor: They don a particularly intimidating set after summoning the Technodrome, with Krang One in particular becoming a full-blown Invincible Villain while wearing it.
• Power Nullifier: Krang One at the very least possesses the ability to seal away the Turtles' mystic powers, though the Turtles in the end manage to overcome this through sheer Heroic Willpower.
• Sadist: Krang One clearly enjoys pitting a brainwashed Raphael against Leonardo and watching Leo suffer fighting his own brother. Krang Two also seems to have this trait, given that while she prefers simply killing her enemies, once Leonardo seemingly ends up lost to the prison dimension alongside Krang One, she laughs at the grieving April and Splinter.
• Sealed Evil in Another World: They were locked away in a separate dimension a thousand years ago when they first attempted to invade Earth. Krang One ends up getting sealed back in that dimension, as he proves to be too physically powerful to actually defeat.
• The Social Darwinist: Krang One isn't broken up about him and his siblings being the only ones left of their kind, feeling that the rest of his kind simply weren't strong enough to survive the thousand years trapped in another dimension. He also declares that their invasion is justified because 'the strong consume the weak'. While not stated outright, it's implied that after the Krang were all banished to the other dimension, the Krang all turned on each other in a fight for dominance, the three Krangs we see in the movie the only ones who survived.
• Sore Loser: After the Turtles manage to upend their invasion, Krang One, trapped in the prison dimension alongside Leonardo, angrily decides to kill Leonardo for destroying the Technodrome and ruining his plans, becoming even more angry when Leo smiles at the fact he saved his family and the world.
• Touch Telepathy: When Raphael refuses to give away the location of their lair, Krang One decides to read his mind by placing his tentacles on his head (and possibly under Raph's skin).
• Toyless Toyline Character: The accompanying toyline for the show had ended prior to The Movie, making the Krang among the few major villains in the series to not get an accompanying toy.
• Truer to the Text: While the invaders share the same name and modus operandi of the prior 2012 animated incarnation, the Kraang, their name is spelt like the original 1987 incarnation, and at least two of the Krang speak in a very human manner like the 1987 Krang, unlike the overly formal and often redundant manner from the 2012 series Kraang.
• Walking Spoiler: Considering the fact that they're the ones the Foot Clan worships and are heavily implied to be the ones indirectly responsible for creating The Shredder, they can be nothing but this.
• Uncertain Doom: Krang Three is last seen being swatted away by Donatello after Donatello gains control of the Technodrome. Considering the Technodrome explodes afterwards, it's possible that he was killed in the blast.
• Villainous Breakdown: Krang One starts to lose his composure after Raphael starts to resist his brainwashing, becoming irritated and starting to actively take part in the fight through trying to assimilate the three other brothers. After he and Leo are stranded in the prison dimension and the Technodrome is destroyed, Krang One quickly loses his temper and starts beating down on Leonardo, and becomes more incensed when Leo smiles after having resigned himself to being trapped there as long as his family is safe. His breakdown is complete when Leo's brothers save him from the prison dimension but keep Krang One trapped inside of it, being unable to do anything except scream in anger at his fate.
  Krang One: Wipe that grin off your face!
• Virtue Is Weakness: Krang One mocks Raphael when he espouses his sense of honor and loyalty since every other species he's wiped out made similar claims.
• The Voiceless: Krang Three does not speak a word in any of his appearances, save for once, when he speaks through his Meat Moss thralls.
  Krang Three: Yes, brother.

The Hidden City

Big Mama

^{Her human disguise}

Voiced by: Lena Headey (English), Rocío Garcel (Latin American Spanish)

A shapeshifting spider youkai who runs the Grand Nexus Hotel, which operates as a hotel for humans and a hub of activity for youkai. Beneath her cheery exterior lies a rather ruthless crime boss who's always looking to expand viewership for the Battle Nexus, a popular gladiatorial arena in the Hidden City.

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• Abhorrent Admirer: Subverted. Even after the revelation that she's giant spider youkai, Splinter still has feelings for her. It helps that he becomes non-human.
• Affably Evil: She seems to have some real fondness for the mutants working under her, but she runs the Battle Nexus, which is essentially blood sport. Her compliments toward Donatello's technology also seem to be, to some extent, genuine, even if it's obviously playing to his ego.
• A Form You Are Comfortable With: She's capable of shape-shifting from her spider form into a more human-looking form, albeit a purple human.
• Amazing Technicolor Population: Her human disguise has purple skin and white hair.
• Big Bad Ensemble: By the end of "Bug Busters", she's become another major antagonist on equal footing with Baron Draxum (and later the Foot Clan when they ally with Draxum) due to using his Oozesquitoes to create more mutants to participate in the Battle Nexus. At least that was the case until season two, where Baron Draxum undergoes a Heel–Face Turn and she's kicked out of the Big Bad role by the Foot Clan once they regain control of Shredder..
• Big Bad Wannabe: Season 2 has her appear discretely at the end of multiple episodes to steal away prior villains, setting up her grand reveal in "Battle Nexus: New York" to turn New York into her new Battle Nexus arena. However, her plan hinges largely on her control over The Shredder as her personal enforcer, so when she loses control over him to the Foot Recruit, she's quickly upstaged while he proceeds to regain his sentience and become the final villain of the series.
• Bright Is Not Good: The true appearance of her hotel is full of bright implements with a fairly comfortable atmosphere, and Big Mama herself has a human disguise with an emphasis on very light colors. The hotel is also home to a blood sport, and Big Mama herself is one of the series' main antagonists.
• Chronic Backstabbing Disorder: Unless it's in her best interests to play nice, she will most likely betray the other party: she takes the Oozesquitoes from the Turtles in "Bug Busters" (which she provided the resources to capture) to make more Battle Nexus contestants, and her backstory involves buddying up with Lou Jitsu only to kidnap him and force him to partake in the Battle Nexus (though her feelings were genuine). In "Many Unhappy Returns", Leonardo actually exploits her untrustworthy nature; he escalates the deal to help them in exchange for a fight in the Battle Nexus so much that when she inevitably does betray them, he's already come up with a countermeasure that not only gives them an advantage in the fight, but also forces her to honor the bargain due to the show they put on.
• Cool Train: Has a Mystic Train that Draxum uses in "Insane in the Mama Train".
• Classy Cravat: Wears a violet one in human form.
• Disc-One Final Boss: She's set up as the new main villain of Season 2 after Baron Draxum is depowered and the Shredder is brought under her control, only to lose control of the latter soon after enacting her masterplan.
• Everyone Calls Him "Barkeep": It's never mentioned what her real name is, and she even refers to herself as "Big Mama" when speaking in the third person
• Evil Is Not a Toy: Despite her countermeasures, she ultimately still ends up losing control of the Shredder, ending up severely injured and her hotel being destroyed.
• Evil Versus Evil: She's opposed to Baron Draxum, but only because she wants to mutate people to drum up more contestants for the Battle Nexus.
• Friendly Enemies: With her ex-boyfriend Splinter aka Lou Jitsu. When she isn't threatening the lives of him and his sons, she exhibits a clear attraction towards him. Splinter in turn can't help but maintain a slight torch towards her as well.
• Has a Type: If her history with Lou Jitsu and her present day reaction to Bullhop is any indication, she's attracted to men who can dance.
• I Lied: She frequently alters the terms of her agreements at the last second to solely benefit herself.
• Impossible Hourglass Figure: In her human guise.
• Interspecies Romance: She was quite taken by Bullhop when he impresses her with his skills on the dance floor. In the past, she was in a relationship with Lou Jitsu, before he was turned into Splinter. Later episodes show that she still has feelings for him and even outright helps the turtles and their allies when she hears that Splinter's life is in danger.
• Irony: Big Mama seals the populace of New York and the Hidden City in an orb in "Battle Nexus: New York" as a bargaining tool against the Turtles. This ends up helping the Turtles as this is before Big Mama loses control of the Shredder, and significantly diminishes the risk of Shredder killing everyone in New York and the Hidden City.
• Obviously Evil: She's a Jorōgumo, and runs a hotel which freely streams the Battle Nexus, which she casually describes in a manner that indicates that its contestants don't generally survive. Leonardo was the only one who was rightly suspicious of her.
• Perfectly Cromulent Word: She's fond of using grandmother-like designations or descriptions which often aren't real words. Baron Draxum is apparently familiar enough with this trait that it annoys him enough to tell her to knock it off when they first meet again.
• Purple Is Powerful: Her main color motif in both youkai and human form, signifying the position of power she holds in her hotel and the Battle Nexus.
• Seductive Spider: Big Mama is a spider Yokai known as the Jorogumo. Like the mythological creature she takes the form of a beautiful woman to lure in unsuspecting victims to become fighters for her Battle Nexus. She is very flirty with Splinter/Lou Jitsu even after the latter learned of her malevolent nature, and many other males throughout the show.
• Silver Fox: Her status as a youkai makes it difficult to determine exactly how old she is, but it's noted within the show that she wears her age very well.
• Terms of Endangerment: She's prone to giving everyone cutesy nicknames even as she threatens them or tosses them into life-or-death battles for her own amusement. Her genuine feelings for Lou Jitsu, her "snuggle muffin beefcake", did not stop her from kidnapping him and throwing him into the Battle Nexus.
• Tsuchigumo and Jorogumo: She's an attractive woman that turns into a Giant Spider youkai. Her backstory with Lou Jitsu even borrows closely from classic jorōgumo tales of men being enticed by the youkai's human guise. However, her spider form's bulky, fur-covered design is more typical of the male tsuchigumo (or the even more monstrous ushi-oni).
• Villainous Crush: Shown to have some feelings towards Bullhop after her dance with the latter, and has a history with Lou Jitsu as it turns out. She and Lou used to actually be a couple...before she revealed her true form and kidnapped Lou to become a fighter in the Battle Nexus. She actually is still attracted to him when she meets him as Splinter, even moreso now that he's a mutant in fact. And in "Rise" when she hears that his life is in danger, she helps out the turtles.
• Voluntary Shapeshifting: She has a sort of mystical device her and her workers wear, which allow her to look human.
• White Hair, Black Heart: Has white hair but she's an Affably Evil yokai.
• Youkai: She calls herself and the beings who work under her as such, and is modeled off (if not outright) a Jorōgumo.

The Guardsmen

Voiced by: Fred Tatasciore

Two yokai bounty hunters named Garm and Freki who were formerly employed by Draxum.

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• All There in the Manual: Their names are never spoke out loud.
• Bounty Hunter: Their job means they're loyal to whoever pays the, or in the council's case, willing to have their time working for the Baron forgiven if they do as ordered.
• Casting Gag: Fred Tatasciore previously voiced Rocksteady in the 2012 series, who was also a big guy with a Russian accent in a duo who battle the Turtles. He's also had experience voicing buff characters with Russian accents besides a Turtles' villain.
• Husky Russkie: One of them has a Russian accent, which makes little sense since they're from an underground city in New York.
• Starter Villain: They're the first villains that the Turtles battle in this series.
• Those Two Guys: They're never seen apart.

Señor Hueso

Voiced by: Eric Bauza

A doorman for a pizzeria, who occasionally meets the Turtles.

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• A Day in the Limelight: He plays a prominent role and gets a lot of backstory in "Portal Jacked!", with Leonardo being the Deuteragonist of that particular episode.
• Cool Uncle: While he isn’t his uncle, his relationship with the turtles gives off this vibe.
• Dem Bones: He's a sharply dressed living skeleton. He sometimes uses his left arm as a cane.
• Deadpan Snarker: Hueso is definitely sarcastic enough to deal with Leo’s antics.
• Hero of Another Story: "Portal Jacked!" shows that he has a troubled history with his pirate brother (who dragged him into his crimes).
• Jerk with a Heart of Gold: He doesn't like having the Turtles in his pizzeria, and is always quick to reject going along with their antics (often being dragged along anyway) due to how much they annoy him. That being said, he's willing to show respect when he feels they've earned it.
• Spicy Latino: A mild version of this. He’s not necessarily angry, but is definitely sensible and serious.
• Wonder Twin Powers: It's revealed in "The Hidden City Job" that he, a walking skeleton, and his boneless brother are capable of fusing, forming a full flesh-and-blood human named Don Suave.

Capitan Piel

Voiced by: Christian Lanz

Señor Hueso's brother.

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• Cain and Abel: The Cain to Hueso's Abel, what with him being a pirate. They reconcile in "The Hidden City Job".
• Heel–Face Revolving Door: He's introduced as an antagonist, but claims to want to be a changed man in "The Hidden City Job". He spends the entirety of the episode lying to Hueso and Leo about the exact nature of his One Last Job but ultimately comes around to the side of good in the end.
• Gonk: Courtesy of being made completely of flesh and no bones.
• Meaningful Name: "Piel" means "skin" in Spanish.
• Sibling Yin-Yang: He's a boneless criminal while his brother is a legitimate business skeleton.
• Wonder Twin Powers: He is a boneless man of flesh whose brother is a walking skeleton. They can fuse together and become a superhumanly handsome man named Don Suave.

Don Suave

Voiced by: Eric Bauza, Christian Lanz

A handsome Latino man, the fusion of Senor Hueso and Captain Piel.

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• Even the Guys Want Him: Big Mama's goons and Leo think he's hot.
• Latin Lover: What he essentially is.
• Mr. Fanservice: He's so handsome that his very radiance can literally knock people out.
• Power is Sexy: Can Curb-Stomp Battle an opponent by flirtatiously glancing at them and saying a word in Spanish.
  Don Suave: Guineo. Melada. Fuego. Machismo.

Sunita

^{Click here to see her slime form.}

Voiced by: Kody Kavitha

A human friend of April who turns out to actually be a slime-based yokai.

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• Ambiguously Brown: Her human form is dark-skinned but it's hard to pin down her ethnicity, given that her name is in Hindi (see below). Justified again since she's really a slime yokai.
• Genki Girl: She's lively and energetic.
• Graceful Ladies Like Purple: Her attire is in different shades of purple.
• I Just Want to Be Normal: Expresses this wish in her debut episode since she turns out to actually be a yokai. Ironically on a day April's trying to appeal to be normal to her.
• Losing a Shoe in the Struggle: She helps the Turtles beat up the Foot Clan that attack April and her, but in the aftermath, noticed her boots were gone after she went back to human form. This was due to the shoes being part of Shredder's armor with the Foot Clan having managed to grab them during the fight.
• Meaningful Name: Sunita is Hindi for "one of good behavior" and she's a sweet yokai.
• Tomboy and Girly Girl: The girly one to April's Tomboy.
• Slime Girl: Her true self is a green slime-esque youkai.
• What Happened to the Mouse?: Like Mayhem, Sunita doesn't return in the second season. There's no mention of her from April or the turtles, making her sudden disappearance a mystery.

"The Crying Titan" (UNMARKED SPOILERS)

An ancient being who granted Oroku Saki's wish for power by turning him into the Shredder. It may also be the creature inside the Crying Titan, and thus the source of Empyrean and all Yokai's power. And on top of that appears to be a member of the Krang.

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• Abusive Precursors: It's implied that it's part of an alien race who ended up creating yokai, but this one in particular created the Shredder's armor.
• Ambiguous Situation: Karai assumes it was an oni, but its resemblance to Krang suggests it may be of extraterrestrial origin. It's also possible it's the pilot of the Crying Titan, meaning it may be long dead.
• Greater-Scope Villain: It created the Shredder and possibly all Yōkai, but it's only seen in flashback. If it's the being in the Crying Titan, then it appears to have already died or gone dormant.
• Jackass Genie: It gave Oroku Saki the power to protect the Foot Clan, but it also turned him into a power-hungry tyrant.
• Last Episode, New Character: It's only shown in the series finale.
• Mythology Gag: Its appearance is clearly modelled after Krang, which brings to mind the 2003 cartoon version of the Shredder who was an alien that took over the identity. It also emits the same screeching sound as the 2012 cartoon incarnation of Krang. If it's also the pilot of the Crying Titan, then it references Krang's android body from the 1987 series being capable of growing in size.
• No Name Given: Karai doesn't identify it by any name.
• Oni: Karai describes it as "an oni", though it doesn't bear much resemblance to the typical depiction, and she is very much mistaken to its true nature as an alien.
• Walking Spoiler: Its existence reveals the true origin of the Shredder, and possibly all Yōkai.

Other mutants and yokai

Todd Capybara

Voiced By: Thurop Van Orman

A ridiculously friendly Capybara mutant.

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• Beware the Nice Ones: "Todd Scouts" shows that he can be plenty dangerous when he has to defend himself, specifically because he can summon hoards of forest critters to overwhelm his opponents.
• Cloud Cuckoo Lander: Todd is a sweetheart, but definitely has his moments of oddness.
• Cool Uncle: While he isn’t their uncle, Todd has this relationship with the turtles.
• Friend to All Living Things: His kindness extends to all animals, and they in turn love him. This also means he has a startling degree of control over all wildlife, as demonstrated in "Todd Scouts" when he summons hoards of forest critters to fight off the rogue dentists pursuing him and the turtles.
• Good Is Not Soft: In "Todd Scouts", when the turtles and him are attacked by rogue dentists, he essentially goes Super Saiyan in order to defeat them.
• Hair of Gold, Heart of Gold: He has a blond hairdo, and is unequivocally the most genuinely kind of the cast.
• Heroes Love Dogs: He's introduced enthusiastically manning a dog shelter in "Repo Mantis".
• Hidden Depths: "Anatawa Hitorijanai" reveals that he's also a master blacksmith and keeps a forge underneath his home.
  • He also has some knowledge of Japanese history since he points out that ninjas first used repurposed farm tools as weapons.
  • In the opening of the Movie, he can be seen fighting with the resistance.
• Nice Guy: His main defining feature is his sheer niceness towards everyone, even blatantly evil characters like Draxum's makeshift League of Evil Mutants. Even when he's wronged, he doesn't seem capable of holding a grudge for too long. It's so much a part of him that when Meat Sweats accidentally assimilates him, he also becomes incredibly nice.
• Obliviously Evil: He ended up accidentally joining the League of Evil Mutants in the titular episode because he thought it was just a friendly get-together. He didn't really do anything while he was a part of the group though.
• Power-Up Food: He can drink his Lemonade Especial for a "Lemon Rush" which basically involves going Super Saiyan and turning his animal empathy up to rally an unstoppable rush of animals.
• Small Role, Big Impact: He creates gardening tools for the Turtles to use as replacement weapons in the series finale, which, due to the Turtles' Hamato Ninpo, transform into their iconic weapons.
• Tender Tears: He sheds these when he thinks the turtles aren’t taking him seriously in "Todd Scouts".
• Trademark Favorite Food: Lemonade; he's constantly shown making it.

Bullhop

Voiced by: Dave Foley (English), Miguel Ángel Ruiz (Latin American Spanish)

A bellhop turned mutant bull/dance aficionado.

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• Crouching Moron, Hidden Badass: Despite his clumsiness following his transformation, and lack of skill as a fighter/ninja, he successfully infiltrates Big Mama's party and almost finishes the turtles' mission on his own.
• I Know Mortal Kombat: He learns to dance well enough to impress Big Mama by playing the turtles' DDR game.
• The Klutz: Post-transformation, he basically the epitome of this. Was notable quite graceful beforehand, and attributes said klutziness to not being used to being a towering, top-heavy bull.
• Our Minotaurs Are Different: He was turned into a humanoid bull, akin to a minotaur.
• No Celebrities Were Harmed: If being a bellhop and a klutz wasn't enough, his human form is a dead ringer for Jerry Lewis. Even after being transformed, he once flees a dance, leaving a shoe behind, a la Cinderfella.
• Stealth Pun: He's quite beefy.
• The Thing That Would Not Leave: The turtles originally planned an appreciation day to make up for turning him into mutant. This stretches across two weeks.
• Was Once a Man: Went from a skinny human bellhop into a muscular bull-man after being mutated.

Ghostbear

Voiced by: Jorge Gutiérrez (English), Carlos Hernández (Latin American Spanish)

A professional wrestler once considered unbeatable, he was defeated by Leonardo by accident and has sworn revenge against the turtles for ruining his perfect record. He's later bitten by an oozequito and mutated into a polar bear.

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• Bears Are Bad News: His motif as a wrestler has him dress as such, he really did became a bear however when he mutated.
• Bright Is Not Good: He wears what appeared to be a white bear pelt and considered an icon to his fans, But his personality is that of a petty arrogant cheating jerkass.
• British Teeth: Even before his mutation, his teeth were crooked and yellow.
• Broken Pedestal: Raph looks up to him until it's discovered that he is willing to cheat to win. Though Raph is back to being his fan in Ghostbear’s next appearance.
• Empowered Badass Normal: He's able to take on the turtles with nothing but his strength and dirty tricks, before he eventually gets bitten by an Oozesquito in his third appearance.
• Evil Is Petty: After losing his wrestling title to the turtles (by accident no less), he always seeks to get even with them in petty ways. The turtles literally use this against him in 'Late Fee'.
• Intangible Man: Becomes this after his mutation, which makes his name all the more fitting.
• Jerkass: His debut episode shows how much of a jerk he is, and has dedicated himself to giving the turtles a HORRIBLE time as such, whether it be returning a DVD or causing them to fight one another.
• Revenge: His goal is to get revenge on the turtles for ruining his professional wrestling career.

Piebald

Voiced by: Chelsea Peretti

A goldfish that was formerly a pet to Splinter and the turtles. She was accidentally flushed down the toilet and mutated after eating an oozesquito. She came back for revenge, but turned out was just a plan to scare the brothers about the dangers of lying.

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• Affectionate Parody: Her debut is a parody of horror movies, in particular I Know What You Did Last Summer (sharing the hook weapon of the film's antagonist), but she also does Sadako's famous "well crawl".
• Bait-and-Switch: It seemed like Piebald was a villain and was out to get the turtles, but she turned out to be a good guy after all. Her acting evil was merely part of Splinter's plan to teach the boys a lesson. Piebald actually seems quite friendly.
• Dark Is Not Evil: She utilizes quite a few fear tactics and is in a dark cloak, but turns out to be helping Splinter teach a lesson to the Turtles about lying. She also doesn't seem to hold a grudge against the Turtles at all, at best saying that trying to cover up her apparent death wasn't really their best moment.
• Fish out of Water: Quite literally. Being a mutant enabled her to walk on land.
• Happily Adopted: She was adopted by Splinter and the turtles as a pet until she was flushed. At the end of the her debut episode, Piebald seemed on very good terms with Splinter still. She even refers to him as her father.
• Hooks and Crooks: Her main weapon seems to be a hook.
• Invisibility: Seemingly one of her main abilities.
• Nice Girl: Was actually one after all.
• One-Shot Character: She only appears in "Flushed, but never Forgotten".
• Revenge: Subverted. After she mutated, it appeared that Piebald came back to get revenge against the Turtles and Splinter, but it turned out just to be a ruse by her and Splinter.

Red Fox

Voiced by: Lauren Lapkus (English)

A red panda youkai who loves acting, and got her big break by playing the role of Jupiter Jim's sidekick.

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• Big Damn Heroes: Red Fox arrives just in time to save Marcus Moncrief and Raphael from being dropped into acid by Scor-Pion.
• Dude, Where's My Respect?: Years of never being respected or thanked by Marcus Moncrief caused her to quit her role as Jupiter Jim's sidekick. Finally being thanked for saving his life is enough to reunite them.
• Heli-Critter: She can use her tail to fly.
• Prehensile Tail: One of her youkai powers is her ability to use her tail as a third hand.
• Sophisticated as Hell: She talks about wanting to be a serious actor... moments before a stagehand informs her she's about to be fired out a snot cannon.
• Top-Heavy Girl: Her arms and torso are huge in comparison to her tiny legs.
• "Well Done, Sidekick" Girl: All she ever wanted was a single thank you, thumbs up or even a patronizing hair-ruffle for helping Jupiter Jim save the galaxy.