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Major Recurring Villains

    Dr. Victor Falco/The Rat King 
Voiced by: Jeffrey Combs
https://static.tvtropes.org/pmwiki/pub/images/Falco_9554.png
https://static.tvtropes.org/pmwiki/pub/images/Rat_King_2740.png
Click here for spoilers 
Though your eyes I finally see the world for what it is.

A scientist involved with the Kraang. He modifies their mutagen, tests it on one of his colleagues, and then uses it to give himself psychic powers. A subsequent lab accident turned him into this continuity's version of the Rat King.


  • Actor Allusion: This isn't the first time Jeffrey Combs plays a camp slimy bastard scientist experimenting with a greenish substance that violates the laws of science and nature.
  • Adaptational Villainy: Most versions of The Rat King either want to be left alone or keep rats safe, sometimes even working with the Turtles. This version of The Rat King does things to his rats that run contrary to his stated goals, and his actions are driven more by spite (such as his treatment of Rockwell and obvious hatred of the Turtles) and megalomania than truly feeling wronged by the world.
  • Adaptational Wimp: Most continuities featuring The Rat King give him enough physical ability to hold his own against the Turtles, but this version is far weaker and relies on his powers to do his work because he was seriously burned and emaciated, thus removing physical combat as an option.
  • Animal Motifs: As The Rat King, which this version takes a little farther by showing his eyes sunken in, his fingernails having grown much longer, and grotesque teeth.
  • Arch-Enemy: After becoming the Rat-King, Dr. Victor Falco becomes this to Splinter/Hamato Yoshi with his attempts at Mind-Raping him; The Rat-King is the only other character besides the Shredder that Splinter has a serious blood feud with. Splinter eventually ends his feud with Falco by sending him into a Disney Villain Death, and finds his corpse in that same pit after Super Shredder sends Splinter there.
  • Bandaged Face: As the Rat-King, thanks to the accident that transformed him disfiguring his face.
  • The Beastmaster: As the Rat-King, and even controls Splinter in one appearance.
  • Bitch in Sheep's Clothing: He appears to be a pretty nice guy for most of his first appearance; we only learn at the end of it that not only was he the villain of the episode, but he also practiced experiments on his own partner just so he could get psychic powers.
  • Body Horror: As the Rat King, he is hideously emaciated and corpse-looking, likely having been burned terribly when his laboratory caught fire.
  • Break Them by Talking: Attempts this on Splinter.
  • The Bus Came Back: Returned after a year for "Of Rats and Men". He makes a posthumous return in "Darkest Plight", more than two years after his previous appearance.
  • Canon Character All Along: His first appearance doesn't have much overall importance to the narrative aside from hinting at April's empathic abilities, making him easily come off as just a disposable one-shot character. His second appearance quickly reveals, in his attempt to get his psychic powers back, that he's actually this adaptation’s version of The Rat King.
  • Character Death: Is sent "plunging into darkness" by Splinter after he's rendered blind and Splinter outmaneuvers him. We find his corpse in the fourth season.
  • Combat Clairvoyance: Thanks to the mutagen, he's gained Psychic Powers, which allows him to predict his opponents' moves and respond accordingly. Donnie manages to defeat this by fighting without thinking.
  • Composite Character: His backstory as a scientist that acts kind but has malevolent and scientifically unethical intentions brings to mind Dr. Victor Feral, a character from the Teenage Mutant Ninja Turtles & Other Strangeness Tabletop RPG.
  • Crippling Overspecialization: His biggest flaw. He relies extensively on his powers whenever he has them.
    • When he has psychic powers, he's completely confident that he'll win because he can read his opponents' thoughts, until Donatello defeats him by clearing his head and wildly attacking.
    • After becoming the Rat King, his psychic powers are far more potent than his original ones, but they only work on rats or rat-like creatures, such as Splinter, and he's blind, forcing him to look through the eyes of rats. He's otherwise too physically weak to fight, and relies on his rats to rush the opponents. By his third appearance, he ends up killing most of his army just trying to get rid of Splinter, loses his seeing eye rat, and then Splinter covers up his own eyes, which leaves Rat King utterly defenseless against Splinter.
  • Dark Is Evil: His new look as The Rat King evokes this to the extreme.
  • Dead All Along: Throughout his time in Undercity during "Darkest Plight", Splinter is haunted by the image of the Rat King, taunting him throughout the episode. Splinter eventually "defeats" him, only to find the Rat King's corpse long dead, the whole event being a fever dream from his broken leg the entire time.
  • Disability Superpower: He's completely blind, but as an exchange, he can see through the eyes of rats and control them.
  • Discard and Draw: His empathic abilities seemed to be temporary, but manages to get the presumably permanent ability to control rats.
  • Disney Villain Death: What happens to the Rat King when Splinter blinds him in "Of Rats and Men", which results in Splinter manuevering him into falling off a ledge and "plunging into darkness". Although he later returned in "Darkest Plight", it was merely a hallucination and we later see his corpse, now reduced to a skeleton, confirming that the fall did, in fact, kill him (his ribcage is busted wide open).
  • Expy: Of Herbert West from the Re-Animator films, right down to having the same actor.
  • Four Is Death: Falco/Rat King has appeared four times total throughout the series, but his fourth appearance is as a ghost/hallucination, as he was killed in the second season and his skeleton appears here.
  • From Nobody to Nightmare: Goes from a scientist to a (temporary) empath to a man who controls all the rats in New York City.
  • Hate Sink: He's one of the few villains in the series who has no comedic elements and even fewer redeeming qualities. In his first appearance, he pretended to be worried for his friend that he mutated into an ape so he could use him to create a formula for psychic powers. He even put said friend into a cage, likely torturing him. When he does become the Rat King, he took control of Splinter, looking to the painful memories of losing Tang Shen as proof of them being outcasts, and has him try to murder his own sons. It's no wonder he's the only other character besides the Shredder that Splinter despises.
  • Horse of a Different Color: He rides a darker-than average giant Rat named Caligula.
  • Hypocrite: Despite stating his goal is to liberate rats, he's sent several plummeting to their doom to kill Splinter, doesn't lift a finger to help one that mutated itself by accident, and called them disgusting shortly before his mutation. It's more likely he considers his brethren a means to an end than actually believing in his goals.
  • Ink-Suit Actor: He looks a whole lot like his voice actor, Jeffrey Combs circa 1985.
  • Killed Off for Real: He hasn't shown up at all in the third season after falling to his doom in "Of Rats and Men". Although he returns in "Darkest Plight", more than halfway into the fourth season, he was actually a hallucination, and we're later greeted to a lovely shot of his decayed corpse, finally confirming that the fall killed him.
  • Knight of Cerebus: Not so much so in his first appearance, but as the Rat King, he attacks the Turtles very personally (trying to murder April and take control of Splinter) and tries to make Splinter give up his humanity via Mind Rape. It says something that he's so far the only character besides the Shredder that Splinter has outright tried to kill, something he succeeded at the second time Splinter confronts him, though the final results of the Rat King's death aren't seen until "Darkest Plight", halfway through the "City at War" arc. While the episode and its arc are already plenty dark, the Rat King's presence makes it one of the darkest, most horrific episodes of the entire series.
  • Mad Scientist: Whenever he appears though more mad than usual after becoming the "Rat King".
  • Maybe Magic, Maybe Mundane: It's left ambiguous whether his appearance in "Darkest Plight" was Splinter's fever dream or his ghost.
  • Mind Rape: Does this to Splinter while trying to take over his mind, but his love for his sons wins in the end.
  • Mind Control: He develops the power to control rats, which leads him to become the Rat King.
  • Misanthrope Supreme: As the Rat King, he decides that Humans Are the Real Monsters and plans to drive them out of New York for good.
  • Not So Similar: Tries to paint himself as Not So Different to Splinter, saying that they both have lost their humanity, see through the eyes of rats, and eventually lost everything that they stood for. Splinter doesn't see it that way, however, and Victor himself was selfish and power hungry.
  • Not-So-Well-Intentioned Extremist: He proclaims that he's trying to make the world safe for rat-kind, but given how horribly he treats them (such as not even lifting a finger to help one that got themselves accidentally mutated), it's an obvious front for his megalomania.
  • One-Winged Angel: His last appearance to Splinter has his hallucination cover himself in a mass of rats to get Splinter to succumb to his Mind Rape.
  • Pet's Homage Name: The Rat King names all of his rats after famous Greeks and Romans—such as Caligula for his giant rat steed and Aristotle for his seeing eye rat.
  • Promotion to Opening Titles: Appears in the Rogues Gallery section of the season two opening.
  • Reality Ensues: Even in a series where much of the mutants have enhanced biology, the Rat King was simply too decrepit and weak to survive the large drop in "Of Rats and Men", with his ribcage having busted open from the fall.
  • Red Eyes, Take Warning: His eyes become bloodshot after he injects himself with the psychic neuro-chemical. After his transformation into the Rat King, the few times you see his eyes show that they have turned into a more Body Horror like example of these, as seen on the Nightmare Fuel page.
  • Rule of Three: He encountered the Hamato Clan 3 times total thus far. While he slips away the first two times, the third encounter led to his demise via Splinter and Disney Villain Death. Falco's third appearance as the Rat King is as a ghost.
  • Sadist: He personally takes cruel delight in trying to kill the Ninja Turtles by manipulating Master Splinter.
  • Sai Guy: He briefly uses one of Raphael's sais in his first appearance.
  • Scary Teeth: His teeth are noticeably deformed from the explosion and presumably a lack of hygiene.
  • Seeing Through Another's Eyes: He is completely blind as The Rat King, and is forced to see through the eyes of other rats. Splinter exploits this weakness in "Of Rats and Men", where he gets rid of Aristotle, the Rat that's always on the Rat King's shoulders, and then blindfolds himself, rendering the Rat King entirely blind and ultimately resulting him getting "sent over the edge", finishing him off.
  • The Sociopath: Oftenly.
  • Smug Snake: In his first appearance only. He exchanges his ego for nihilism and a Knight of Cerebus position during his second appearance making him a far greater threat.
  • Spared by the Adaptation: Averted. In his third appearance he falls off a cliff, and it's revealed in his fourth that he died from the drop, making this the first animated adaptation to kill him off.
  • Theme Naming: He seems to have taken to naming his rats after famous Greeks/Romans, his steed being Caligula and his seeing eye rat being Aristotle.
  • Villainous Breakdown: He loses his composure after his plan to mutate the world's populace fails, which goes further down the drain as he loses Aristotle, the one Rat who helped him see in his fight with Splinter. Then Splinter reveals he took his blindfolds, forcing the Rat King to stumble around (in his view) in the dark, which makes him start yelling at Splinter. Eventually, he was just flailing around, trying to hurt him, before falling off a cliff and dying.
  • Villain: Exit, Stage Left: He's pretty good at getting away quickly after losing the first two times the Hamato Clan has to deal with him (first as a human, then the first meeting with him as the Rat King). The third time, he doesn't escape and falls to his Disney Villain Death instead, with his corpse and a hallucination of him coming to Splinter in "Darkest Plight".
  • Voice of the Legion: The Rat King's One-Winged Angel form in "Darkest Plight" has a seriously distorted voice.
  • Weak, but Skilled: He isn't stronger than a human being physically, but his powers are dangerous enough to make up for it. On the other hand, he uses them as a crutch and is easily defeated when he is unable to rely on them.
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    The Newtralizer/K'Vathrak 
Voiced by: Danny Trejo
https://static.tvtropes.org/pmwiki/pub/images/newtra-w145-h275_5227.png

An assassin and member of the alien race known as the Salamandarians (which includes Mona Lisa and Sal Commander), who carries a dangerous grudge against the Kraang.


  • Advertised Extra: He's commonly depicted in the opening titles from season two onward despite only making a few appearances in the series, only two of those featuring him actually speaking.
  • Arch-Enemy: He hates Bishop with a passion, and the feeling seems mutual as Bishop is as eager to fight him as Newtralizer is.
    • He's the one who took Salcommander's eye and gave him those scars. Sal pays him back in spades.
  • Ascended Fanfic: Ciro Nieli created the character when he was in elementary school, and now gets to use the character in the show.
  • Badass in Distress: He's among the captives of the Kraang in "Metalhead Rewired".
  • The Brute: More so than most brutes in this series since he is solo, doesn't talk at first, is scarily effective and is seen eating a Kraang alive.
  • Canon Foreigner: He was created for the series.
  • Creepy Souvenir: He has what seem to be Kraang tentacles hanging from his belt.
  • Dark Is Evil: His skin is black save for orange spots on his chest.
  • The Dragon: "When Worlds Collide" makes him this to Dregg. They apparently had a shared history together and while they briefly squabble they never turn on each other.
  • The Dreaded: The Kraang appear to be afraid of him, and for good reason; he eats them. ALIVE.
  • Enemy Mine: Pulls one with the Turtles and the other mutants to escape the Kraang in "Metalhead Rewired."
  • Establishing Character Moment: His first scene shows him swiftly taking out several Kraang and then eating one of them.
  • Evil Counterpart:
    • Manages to be this to Slash, Raphael's own Evil Counterpart. "Newtralized!" establishes that they both share an immense hatred of the Kraang, due to both ending up subject to their cruelty, but the difference is that Slash abhors killing civilians while Newtralizer is completely willing to go through with that type of thing, and maybe even throw his partner away in the process. So much so, this leads Slash to team up with the Turtles and it ends with them on better terms.
    • He's one to Leatherhead as well. Both are victims of the Kraang's cruelty and desire revenge. However, unlike Leatherhead, Newtralizer doesn't care about Earth or it's inhabitants.
  • Evil vs. Evil: He fights the Kraang, but it's mostly for revenge and beyond that, he's not very heroic, not caring about any innocent people that may get caught in the crossfire. Later after the Kraang's brainwashing is broken he becomes straight up evil.
  • Expy: Borrows the basic design of many 1990s Comic Book characters, with a skull marking resembling Marvel's Punisher, or shoulderpads resembling Nate Grey. His methods of hunting people down are rather predatory.
  • Fatal Flaw: Wrath. He hates the Kraang so much he'd do anything to destroy them, including blowing up New York, and this poisons any alliances he makes.
  • Fashionable Asymmetry: One of his shoulder pads is bigger than the other.
  • Guttural Growler: RAKKA RAKKA RAKKA. Danny Trejo is in rare form here.
  • I Call It "Vera": The concept art refers to his shoulder-mounted missile launcher as "Brother Love".
  • Karmic Death: In "When Worlds Collide", he nearly disintegrates Mikey, although Mikey's able to save himself the same way Newtralizer did with his own Psycho Electro powers. He's destroyed when Salcommander smashes him off a cliff and into the core of Dregg's ship, which disintegrates him and his master.
  • Kill It with Water: After getting his Shock and Awe powers, he shows a weakness to water.
  • Knight Templar: Wants to get rid of the Kraang through any means, even if those means result in innocents getting killed. This is a large part of what ends his team-up with Slash.
  • Made of Iron: Attacks from Leonardo's sword, Raphael's sais and Kraang lasers do little to no damage on him. He even shrugs off being crushed by a car. In "When Worlds Collide", he also survives being blasted by water, despite his body now being electrical. Leo even lampshades his Made of Iron nature during the same episode, calling him "indestructible".
  • Pet the Dog: While their Villainous Friendship falls apart, he still went out of his way to save Slash the day they met.
  • Perpetual Frowner: He is a very serious threat in more ways than one.
  • Professional Killer: According to the concept art, he's an assassin from Dimension X. He's also revealed to be an old assassin friend of Lord Dregg's in the fifth season, replacing the missing Armaggon as Dregg's Dragon.
  • Promotion to Opening Titles: Appears in the Rogues Gallery section of the new season two opening, and is one of the primary villains shown at the end of the season five opening alongside Kavaxas, Tiger Claw and Shredder.
  • Seldom-Seen Species: Probably the first Fire-Bellied Newt to appear in a cartoon.
  • Spanner in the Works: Nearly derails the Shredder's Batman Gambit by attacking the Turtles, since it required them to take Kirby back to their lair.
  • Shock and Awe: The teleporter accident at the end of "Newtralized" gave him these. He makes good use out of electricity against the Turtles, Karai, Mona Lisa, and Sal Commander when he returns in the fifth season, using a variety of electric attacks. However, they're also his undoing.
  • Shoulders of Doom: One of his shoulder pads is pretty big.
  • Skeletons in the Coat Closet: The spot pattern on his belly and chest resemble a skull.
  • Translator Microbes: Uses a device to translate his speech, as English is not his native language.
  • Verbal Tic: "Rokka rokka rokka". It is also used by other Salamandrians, particularly in moments of emotional distress, like anger. So a possible interpretation can be that he just curses a lot.
  • Villainous Friendship: Forms one with Slash, and a second one with Lord Dregg, who greets him warmly upon their reunion. They used to be allies and Dregg saves him from the Turtles at least once in Season 5.
  • The Unfettered: He'll do anything to get rid of the Kraang once and for all, up to and including leveling all of New York. This does not change once the Kraang revert back to being Utrom, horrifyingly enough.
  • Walking Armory: He seems to have a few different weapons on him. Arm Cannons being his favorite.
  • Whole Costume Reference: His outfit design is similar to Cable's classic X-Force costume, as well as The Punisher.
  • The Voiceless: Never gets any actual lines in his debut episode; "Newtralized" changes this.

    Ivan Steranko 

    Anton Zeck 

    Savanti Romero 
Voiced by: Graham McTavish
https://static.tvtropes.org/pmwiki/pub/images/savanti.png

An evil mutant time master who had the plot of obtaining the Time Scepter in order to take over time and space.


  • Adaptational Comic Relief: He's portrayed with more of a sense of humor, frequently toying around with the Time Scepter and the Turtles for his own amusement, along with being much more open and honest about his villainy.
  • Adaptation Species Change: He's classified as a mutant in this series instead of a magic Baleful Polymorph like previous versions.
  • Arc Villain: He is the main antagonist of “Turtles in Time” as well as the four-part Monster Arc alongside Count Dracula.
  • Big Bad Duumvirate: Forms one in the final episode of the Monster Arc with Dracula. While Dracula is the bigger threat since he can control the undead armies, Savanti's knowledge of the Time Sceptre means that Dracula needs him for his plans and the two are able to work out an equal partnership.
  • Card-Carrying Villain: He wonders, outright, what evil he can do with the Time Scepter.
  • Conqueror from the Future: He wants to use the Time Scepter to rule time, but is not above conquering whatever time he's in and forcing whoever holds the scepter to come to him.
  • Evil Sorcerer: He uses time just like Renet.
  • Fate Worse than Death: Being stuck in Prehistoric times seems to be this to him which makes sense since their is no technology to get him back home. Guess where he is send to as punishment at the end of both of his arcs?
  • Glass Cannon: Of all the Turtles' major enemies he is the easiest to beat in a physical fight, usually knocked down by hits that other enemies would tank. He makes up for it with a forcefield and some other tricks at his disposal.
  • Manchild: He treats the Time Scepter more like he would a toy than a powerful artifact.
  • Shout-Out: In line with all the horror movie references the third season, he shares the last name of John Romero.
  • Teeth-Clenched Teamwork: With Dracula, as neither one of them can stand the other and would happily kill each other if they could. When Dracula is ultimately staked and killed, Savanti happily says he was a jerk.

    Vringath Dregg 
Voiced by: Peter Stormare
https://static.tvtropes.org/pmwiki/pub/images/lorddregg.png

An insectoid crime lord who is the ruler of Sectoid 1.


  • Adaptation Species Change: He's now an insectoid, as opposed to a vaguely humanoid figure like his 1987 counterpart. He also has cybernetic parts in his skull.
  • Adaptational Wimp: In the 1987 series, Dregg was considered scarier than the Shredder. This version isn't as intimidating and gets outsmarted and thrown out the airlock by the Triceratons.
    • Adaptational Badass: What he loses in intimidation factor, he gains considerably in hand-to-hand combat, his outsourcing, and his manipulative scheming.
  • Aristocrats Are Evil: That's Lord Vringath Dregg, ruler of Sectoid 1.
  • Asshole Victim: Considering that he tried to kill the Turtles, it's probably safe to say that nobody feels sorry for when he's thrown out an airlock and freezes.
  • Berserk Button: The idea that there is a world where insects are stomped on drives him mad.
  • Beware the Silly Ones: Compared to Shredder, he's not that threatening. For every dumb decision he makes, he more than makes up for it in both physical prowess and intelligent scheming. The best example would be his deal with the Salamandrians in "The Evil of Dregg". He uses Mona Lisa as a Honey Trap to play on Raph's unrequited love for her, forcing him and the gang to "save" Sal Commander. However, the Turtles realize the whole thing was a trap too late, forcing Raph into a Heroic BSoD for a majority of the episode. Oh, and he offhandedly mentions having his legions consume the Salamandrian homeworld, which was what caused Sal Commander to strike a bargain with him in the first place. Not bad for an over-the-top comic relief villain.
  • Big Bad: After the Shredder and Kavaxas are Dragged Off to Hell at the start of the fifth season, the next aired episode has Dregg retake the role from Shredder.
  • Big Bad Ensemble: Is this to at least part of the fourth season alongside Captain Mozar. Eventually loses this position temporarily after the Triceratons throw him out an airlock; his part in the ensemble is immediately retaken by the main Big Bad, the Shredder. Once the Shredder is defeated for good and sent to Kavaxas's Netherworld, Dregg returns to the Big Bad role with the Newtralizer.
  • Big Creepy-Crawlies: He's a giant insect.
  • Collector of the Strange: His home is filled with a lot of bizarre alien collectibles.
  • Composite Character: Of both the original Lord Dregg and Maligna from Teenage Mutant Ninja Turtles Adventures, the latter being the leader of a race of alien insects.
  • Disproportionate Retribution: His feud with the Turtles started when he tried to kill them all because Leonardo bumped into him, in spite of the fact that Leonardo apologized.
  • The Don: In space.
  • The Dreaded: If the angry mob chasing the Turtles fleeing for their lives when they stumble onto him is anything to go by.
  • Establishing Character Moment: When he introduced, the mob chasing the Turtles flee at the sight of him, he knocks Leonardo away for touching him when they collided, demands respect and tries to eat Casey for talking down to him.
  • Even Evil Has Loved Ones: His motivation for hunting down the Turtles in The Ever Burning Fire is because they killed his pet scorpinoid which he claims to have loved dearly.
  • Evil Is Petty: The reason why he wants to kill the Turtles is because they destroyed his nice things.
  • Evil Overlord: He owns a fortress of a castle and leads an army of insectoids.
  • Eviler Than Thou: Is on the receiving end of this from Mozar of the Triceratons; the Captain betrays him on a deal for the third piece of the BHG and, instead of paying him or capturing the Hamato Clan for him, tosses him into space.
  • Family-Unfriendly Death: He ends up thrown out an airlock and into space, where we get a close-up view of his frozen carcass onscreen. Subverted in that he survives even that.
  • Fantastic Racism: He despises all non-insect life. He seems to hate humans (or "terrans" as he called April) most of all.
  • Faux Affably Evil: He acts charming at first and is seen interacting in public numerous times. However, he's also a sadistic mob boss.
  • Foreshadowing: In the theme song for the fourth season, Dregg is shown being defeated by being Thrown Out the Airlock by his foes. This is how the Triceratrons ultimately deal with him.
  • Guttural Growler: He speaks in a very shrill voice.
  • Hair-Trigger Temper: As the Turtles found out, it's very easy to make him angry and hostile.
  • Hate Sink: It's made abundantly clear that Dregg is an irredeemable monster with no sympathetic traits whatsoever.
  • I Lied: He promised Mona Lisa that he would spare her homeworld if she helped him betray the Turtles, but he ultimately reveals that he planned to destroy her planet anyway.
  • Kick the Dog: He dumps the Turtles into a pit of his pet insects to make them suffer instead of killing them.
  • Kill It with Ice: Gets thrown into deep space by the Triceratons and freezes. However he lives through that.
  • Losing Your Head: When Raph knocks off his head during the battle on Sectoid 1, Dregg is shown still alive and part robot.
  • Monster Lord: The ruler of planet Sectoid 1 and an army of Vreen, his android bug soldiers.
  • Multi-Armed and Dangerous: He has four arms.
  • Named by the Adaptation: He is given the first name of Vringath.
  • Perpetual Frowner: See his picture? That's pretty much the only facial expression he has, though the corners of his lips did curve upwards ever so slightly resembling a smile when he was making a deal with Mozar in "The Ever Burning Fire".
  • The Sociopath: He couldn't care less about the fate of Earth and intends to barter the black hole device with the Triceratrons. He later tries to destroy Earth himself.
  • Stupid Evil: He forges an alliance with the Triceratons in order to get back at the Turtles, never thinking about the possibility of getting betrayed by them. Unsurprisingly, he's betrayed by them.
  • Thrown Out the Airlock: The Triceratons eject him into space.
  • To Serve Man: He tried to eat Casey and April.
  • Uncertain Doom: Although he was ejected into space, it's not exactly made clear if he froze to death or just suffered Harmless Freezing. The fifth season reveals it was the latter, but now it's very unlikely if he made it out of the explosion that destroyed his ship.
  • Unexpected Character: Since not many fans were fond of him replacing the Shredder as the main villain in the 1987 cartoon, it is rather surprising that the people behind the Nickelodeon show would even think of bringing him back.
  • Villain Team-Up:
    • He forms a partnership with the Triceratrons to defeat the Turtles. Unsurprisingly, he gets betrayed.
    • He later makes another one with the Newtralizer, who kneels before him as his dragon.
  • Villains Out Shopping: In his debut, he's just shopping at a random market minding his own business before the Turtles bump into him, accidentally destroying his product. This is when he becomes their archenemy.
  • The Worf Effect: He's thrown out of an airlock to remind the audience that the Triceratrons are still the more serious threat.
  • You Have Outlived Your Usefulness: After obtaining the last piece of the black hole device, the Triceratrons try to kill him.
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    Armaggon 
Voiced by: Ron Perlman
https://static.tvtropes.org/pmwiki/pub/images/armaggontmnt2012.png

An assassin hired by Dregg to hunt and capture the Turtles.


  • Adaptation Species Change: He is not a mutant, unlike his comic counterpart.
  • Big Bad Ensemble: One of the two Big Bads of the episode "The Outlaw Armaggon", alongside the Overmind, but their goals do not intersect.
  • Bounty Hunter: His profession, and he's good at it.
  • The Dragon: Is this to Dregg, assisting him on a lot of his attempts to quash the Turtles.
  • Good Scars, Evil Scars: Has an X-shaped scar on top of his head.
  • Hoist by His Own Petard: Though he didn't know that Overmind was sentient and wanted to destroy all organic life.
  • It's Personal: After Leonardo makes him smash into Overmind and blow up the station while they escape.
    "Now they've made me mad."
  • Put on a Bus to Hell: The last time we see him, he's dragged down into a pit of monsters.
  • Shark Man: He's a humanoid shark who uses his spacesuit to "swim" in space.
  • Threatening Shark: A bipedal shark in a suit that can allow him to "swim" in space. And has a hunger for the Turtles and their human allies.
  • To Serve Man:
    Armaggon: Mmmm... *licks lips* Haven't had primate in a long time.
  • Suspiciously Similar Substitute: He is this to Tiger Claw, as a badass mercenary who nonetheless remains loyal to his employer, and just like Tiger Claw, has some similarities with Boba Fett.
  • Uncertain Doom: He ends up trapped in pit of insect monsters at Dregg's base, but it's unknown if he's dead or not.

Minor recurring/One-off villains

    Snake/Snakeweed 
Voiced by: Danny Jacobs
https://static.tvtropes.org/pmwiki/pub/images/Snake_7194.png
Snake
https://static.tvtropes.org/pmwiki/pub/images/Snakeweed_9929.png
Snakeweed

A driver for the Kraang who gets mutated into a weed.


    Vic/Spider Bytez 

Vic/Spider Bytez

Voiced by: Lewis Black
https://static.tvtropes.org/pmwiki/pub/images/Vic_6108.png
Vic
https://static.tvtropes.org/pmwiki/pub/images/Spidery_Bytez_1021.png
Spider Bytez

A middle-aged schlub who attempts to parlay his recording of the Turtles into big cash, only to get turned into a spider-like creature by the Kraang's mutagenic ooze.


  • Acrofatic: As Spider Bytez.
  • Advertised Extra: Qualifies as this during season two, seeing as he'd only made two appearances by the end of that season despite appearing in the opening titles.
  • Bullying a Dragon: As a human, he tried to blackmail the Turtles into giving him money for his picture of them, even though he clearly saw them fighting alien robots without a sweat. Had Splinter not instructed them to try to get the picture back without violence, they would probably have taken it from him easily.
  • The Bus Came Back: After an absence spanning almost a year and a half, he made his return in "Metalhead Rewired". He then returns another year and a half later as part of the mutant audience at Xever's race in "Meet Mondo Gecko", this time as a silent cameo.
  • Canon Foreigner: He was created for the series.
  • Cephalothorax
  • Chuck Cunningham Syndrome: He completely falls from the face of the Earth, after making three appearances, the last one being a silent cameo.
  • Enemy Mine: Pleaded for one the entirety of "Metalhead Rewired", before getting his wish when the Turtles and all the mutants work together to escape the Kraang.
  • Fat Bastard: Even when the Turtles tried to save him from the Kraang, he kept acting like a Jerkass to the point it allowed the Kraang to notice the Turtles' intrusion. You really don't feel sorry for him when he gets mutated.
  • Fat Idiot: He has a very loose grip on reality considering the crap he puts the Turtles through during his debut appearance.
  • Giant Spider: As Spider Bytez.
  • Greed: So, so very much.
  • Hate Sink: Not even a shred of likability.
  • Insistent Terminology: "Metalhead Rewired" reveals he purposely calls the Turtles "frogs" just to piss them off.
    The ones that are turtles, that I call frogs, must be destroyed!
  • Instant Expert: He gets the hang of his new form and abilities right off the bat, with no learning curve whatsoever. Unlike Snakeweed, who at least expressed mild surprise when one of his severed limbs grew back, he isn't even shocked to discover he can throw up acid and webbing.
  • Jerkass: He's such a dick throughout his debut episode that the Turtles actually start to wonder why they're risking their lives to save him from the Kraang.
  • Large Ham: More so after his transformation.
  • Metamorphosis: From human to mutant spider.
  • Non-Standard Character Design: His design is remarkably different from most mutants in the show, having a much less visceral, more cartoonish design.
  • Promotion to Opening Titles: Appears in the Rogues Gallery section of the new season two opening.
  • Red and Black and Evil All Over: As Spider Bytez.
  • Smug Snake: Or spider as it were.
  • Super Spit: He can spit webbing and acidic loogies.
  • Toilet Humor: In his first appearance, whenever he shot out webs, fart sound effects could often be heard. This trait appears to have been discarded in "Metalhead Rewired", where it's instead replaced with a noise more common to spider characters (specifically, Spider-Man or Airachnid whenever they shoot webbing).
  • Too Dumb to Live: Combine the Bullying a Dragon and Fat Bastard tropes above and you have this.
  • Trash Talk: Why Raph had to put is "Ignoring Insults" training to good use against him.
  • Ungrateful Bastard: To the point where Donnie blatantly asks the others why they're trying to rescue him in the first place.
  • Was Once a Man: After his transformation.
  • We Will Meet Again: After losing his first battle with the Turtles, he promises to take care of them the next time they meet. As noted above, he's only made two appearances since, and he ended up pulling an Enemy Mine to boot in the first, while making a silent cameo in the second.
  • Xtreme Kool Letterz: His mutation name "Spider Bytez".

    Justin 
https://static.tvtropes.org/pmwiki/pub/images/justintmnt_9918.png

A monster made by the accidental fusing of different samples of animal DNA.


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    Spy-Roach 
https://static.tvtropes.org/pmwiki/pub/images/Spy_Roach_314.png
https://static.tvtropes.org/pmwiki/pub/images/Spy_Roach_Molted_2129.png

A mutant cockroach with a vendetta against Raphael.


  • All There in the Script: Its name in production materials is Chong, even though this fact is never stated in the series.
  • Bald of Evil: By virtue of being a hairless insect.
  • Body Horror: The mechanical stuff on the roach before it mutated was just that: Stuff on the roach. When it mutated, the machinery merged into it, and you can frequently see veins in its buzzsaws and first person view shots. Not to mention that after it molts, it looks like a giant maggot with limbs and robotic wings.
  • Black Eyes of Evil: By virtue of being a roach.
  • Create Your Own Villain: Spy-Roach's hatred of Raphael was born out of Raphael's attempts to kill it when it was a normal roach.
  • Canon Foreigner: It was created for the series.
  • Curb-Stomp Battle: Fights with it tend to end this way.
  • Cyborg: Its mutation causes the technology Donatello outfitted it with to merge with it.
  • Determinator: This is one determined bug.
  • Expy: Of Scumbug from the '87 episode "Night of the Rogues", even if the only similarity is that they're both mutated roaches. However, Scumbug himself makes an appearance late into season four, as a stag beetle/spider-based mutant.
  • Flight: After molting.
  • From a Single Cell: At the end of the episode, he apparently begins to regenerate from his liquified remains.
  • From Nobody to Nightmare: From a normal cockroach to a dangerous mutant.
  • Implacable Man: Like most Roaches.
  • Instant Expert: It acquires a Kraang raygun and uses it against the Turtles with ease.
  • Ludicrous Gibs: Raphael finally destroys it by directing the Kraang's laser-drill at it, which causes it to explode in a shower of slime. This doesn't destroy it for good though.
  • Mechanical Insects: It starts out as a cockroach that Donatello attached cameras and technological parts to. After getting exposed to mutagen it transforms into a cockroach Hollywood Cyborg.
  • Nigh-Invulnerability/No-Sell: As Donatello explicitly points out in the episode, cockroaches are a deceptively durable species. Spy-Roach's mutation just took it Up to Eleven. In the episode, he shrugs off laser blasts, getting run over by the Shellraiser and Raph's bike, and getting pelted by manhole covers. Not even a laser designed to cut through the Earth could kill it.
  • Not Quite Dead: Well Roaches are pretty hard to kill.
  • One-Winged Angel: After moulting, it becomes bigger, stronger, and capable of Flight
  • Red Eyes, Take Warning: The spy-camera it wears over one eye has a red lens.
  • Roaring Rampage of Revenge: Against Raphael
  • Shout-Out: The Terminator.
  • Weaksauce Weakness: Despite Spy-Roach's enhanced toughness brought upon by his mutation, he is still vulnerable to a common spray can of insecticide. Justified since he's still a roach in the same way the Turtles can hold their breath for a significant duration of time.
  • Winged Humanoid: After molting.

    The Parasitic Wasp 
https://static.tvtropes.org/pmwiki/pub/images/wasp-w145-h275_1138.png

A mutant Wasp that is the result of a Kraang Mutagen experiment Gone Horribly Wrong. It winds up infecting Leonardo with a mind-controlling stinger who then passes it on to Raphael and Donatello, with all three becoming guards to the wasp's egg.


  • Badass Crew: Likewise, the three offspring are also quite dangerous, managing to damage Donatello's bo staff and disarm Raph and Leo of one of their weapons each. They are only destroyed by Michelangelo using the Shellraiser's cannon
  • Big Creepy Crawly
  • Beware My Stinger Tail: Since it is a wasp this is a literal example and the fact that it renders its victims as mindless slaves to protect its offspring until the offspring can eat them doesn't help.
  • Brainwashed and Crazy: The Wasp does this to Leonardo via its stinger.
  • Canon Foreigner: It was created for the series.
  • Flight: Mutant wasp after all.
  • Killed Off for Real: From the mother to its babies.
    • And in the episode "Metalhead Rewired", the lone parasitic wasp is the only mutant who is unable to escape from the Kraang, and is last seen falling down to the floor from a very high altitude after the portal closes before it can go through.
  • Ludicrous Gibs: Much like Spy-Roach, the three Parasitica Wasps are destroyed in such a manner that causes them to explode in a shower of slime. Unlike Spy-Roach though, their deaths seem to be actual.
  • Monochromatic Eyes: Like most wasps.
  • Self-Disposing Villain: The only reason it lost. The original Wasp kills itself when it uses its stinger, which yanks it's heart out (as is the case when real bees and wasps sting a person).
  • Truly Single Parent/Monster Progenitor: It managed to lay a fertile egg all by itself, turned the Turtles into zombies, and successfully because a post-mortem parent of quadruplets.
  • The Voiceless: Unlike other mutants (including the Turtles themselves), the Parasitica Wasp does not talk, only buzz. This extends to it's spawn.

    Squirrelanoids 
https://static.tvtropes.org/pmwiki/pub/images/aaah-w145-h275_5960.jpg

A pack of mutant squirrels created when a squirrel found a mutagen container that the Turtles dropped from the Kraang ship. They are able to self duplicate and evolve into a more dangerous form.


  • Body Horror: The squirrels' tongues flail around outside of their mouths and they multiply inside a living organism's stomach.
  • Canon Foreigner: They were created for the series.
  • Killer Rabbit: At first glance they look like normal squirrels, but eventually turn into horrific monsters.
  • Metamorphosis: From squirrels to mutant squirrels to more dangerous Alien expies.
  • Orifice Invasion: The Squirrelanoids reproduce by forcing themselves down a living being's throat, splitting into two inside the stomach, then forcing their way back out through the mouth.
  • Shout-Out: They look like lower-rated versions of the alien from Alien.
    • This makes them look similar to the Pizza Monsters from the 87 series and Turtles in Time game.
  • Villain of the Week: For "Invasion of the Squirrelanoids", although one shows up in a cameo in the Kraang's prison in "Metalhead Rewired".

    Pizza Face 
https://static.tvtropes.org/pmwiki/pub/images/4ded93968253d85e3d4065ab9576d1a0.png
Voiced by: John DiMaggio

A chef who mutated into a Pizza monster after exposing himself to mutagen.


  • Anthropomorphic Food: Both him and his minions are living pizzas, although he's bigger.
  • Ascended Extra: Pizza Face was originally just an action figure for the 1987 series. In-universe, he was featured on various pizza boxes in the first season, before becoming a mutant.
  • Appropriated Appellation: Gets his name from Mikey.
    Michelangelo: The jig is up, Pizza Face!
    Pizza Face: Pizza Face? I like-a that! 'Cause I have a pizza for a face!
  • Evil Chef: Formerly a regular chef, he turned into an evil one after being mutated.
  • Hive Queen: His living pizzas follow him loyally.
  • I'm a Humanitarian: His plan is to turn his hypnotized customers into calzones and eat them.
  • Mook Maker: Can create living pizza servants.
  • Russian Reversal: Mikey describes Pizza Face as "pizza that eats you".
  • Sanity Slippage: Considering he ate a mysterious substance that fell from the sky assuming it was a gift from the heavens, it's quite likely he was already a little crazy, but after mutating he's become completely insane.
  • Too Dumb to Live: Ate mutagen that fell from the sky in a strange container thinking it might make a good pizza topping.
  • Was Once a Man: He used to be a human pizza maker named Antonio.

    Ho Chan 
https://static.tvtropes.org/pmwiki/pub/images/hochan.png
"I see a girl with red hair and a yellow jumpsuit, no, it's just a t-shirt"
Voiced by: James Hong

The ghost of an ancient Chinese sorcerer from the Shang Dynasty who is unwittingly freed by the Purple Dragons in "A Chinatown Ghost Story".


  • Blow You Away: One of the powers Ho Chan grants when making you his servant.
  • Canon Foreigner: He was created for the series.
  • Curb-Stomp Battle: Ho Chan ends up on the receiving end of one of these from Ghost Splinter in "End Times"
  • Deal with the Devil: He promises power and wealth to anyone willing to be his servants. The catch is that he has absolute control over anyone who accepts his offer.
  • Dirty Coward: As soon as he's sealed back in his dagger and about to be thrown into the ocean, he tries to bribe Donatello with power and riches.
  • Disproportionate Retribution: According to his Infomania article, he was prone to doing this in the past.
  • Expy:
    • Of David Lo Pan from Big Trouble in Little China. He's even voiced by James Hong.
    • He also takes a major playing card from Jackie Chan Adventures villain Daolon Wong, who was also voiced by Hong, by forcibly recruiting TWO trios of dark magical warriors, also unlike JCA, the second set is more powerful, seeing that it's three of the Turtles (Donnie isn't one of them). One of these minions also wears a straw hat and wields lightning like Raiden from Mortal Kombat, which contains another sorcerer, Shang Tsung, who was inspired by Lo Pan.
  • Evil Sorcerer: Natch.
  • Faux Affably Evil: For an evil sorcerer, he's remarkably energetic and laid back, and imbues power to those wish for it, though he will dispose of them if they are incompetent with their abilities or someone better comes along.
  • Freeze-Frame Bonus: His Infomania article reveals much of his backstory such as how he gained his mystical powers after tripping on a small, yet very dense turtle and hitting his head on equally small, yet dense rock, and how threw himself into dark sorcery after his wife died.
  • Irony: Based on his Infomania article.
    • He supposedly gained his powers after tripping on a small turtle and hitting his head on a small stone. He is a foe of the Turtles in present day.
    • The colony he founded practiced a form of tea reading based on the tea and condiments spilled on their laps. His beloved wife died from an aneurism caused by tea being spilled on her robe. As a result, his colony's particular form of practice had since been discontinued.
  • Large Ham: Courtesy of his actor James Hong.
  • Nice Hat: Wears an ancient Chinese hat resembling the one worn by Lo Pan. According to his Infomania article, he apparently had a liking for fancy looking hats. Also gives a straw one to the goon whose using electricity.
  • Outside-Genre Foe: He's the first supernatural foe the Turtles have faced in this incarnation, and as such, is far more difficult to face due to the characters barely understanding his powerful sorcery.
  • Pet the Dog: According to his Infomania article, his wife Wei was the only one he didn't curse among the members of the "Sorcerer's Saucer Sauce".
  • Punny Name: According to his Infomania article, he founded a colony of sorcerers and tea drinkers called the "Sorcerer's Saucer Sauce".
  • Really 700 Years Old: He's 2000 years old just like Lo Pan.
  • Sealed Evil in a Can: He was sealed in a mystical dagger by members of his colony paid by the Emperor when his dark powers became too much to handle.
  • Shock and Awe: Ho Chan can grant his servants the power of thunder and lightning. He uses the ability himself when he's brought back to Earth in "End Times".
  • Tap on the Head: Apparently, tripping on a small rock and hitting his head on a similarly small Turtle was what gave him his abilities. Historians apparently also state the trauma might have actually given him an untreated concussion, which made him particularly unstable.
  • We Will Meet Again: He said he would return after Donatello throws his dagger in the ocean. He finally does return in "End Times".

    The Creep 
https://static.tvtropes.org/pmwiki/pub/images/the_creep.png

A plant mutant born out of Leonardo accidentally expelling Mutagen-laced medicine from his body upon plants.


  • Canon Foreigner: He was created for the series.
  • Create Your Own Villain: He was created when Leo vomited the Mutagen-derived medicine Donnie made for him on a group of plants.
  • Don't Look at Me!: Appears to hate having its mess of a face be seen unless it is unavoidable.
  • Fusion Dance: After he and Son of Snakeweed are blown up, their remains join together, becoming a new creature dubbed Creepweed.
  • Green Thumb: He turns Raphael into a plant by draining all the mutagen out of him.
  • Healing Factor: Gets his arm cut off at one point, and manages to just reattach it.
  • Leitmotif: He's accompanied by one which sounds a whole lot like Jason's.
  • Offscreen Teleportation: Manages to pull one off when he calmy strolls after the Turtles, only to appear before them later.
  • Shout-Out: Several.
    • A blatant one to Jason Voorhees; like him, he is a giant Implacable Man living in a cabin in the wood, hiding his face with a bag over his head (like in Friday the 13th Part 2) which he later replaces with a hockey mask (like in Friday the 13th Part III), and the first part of his episode plays a lot like a Slasher Movie. His overalls even have the brand name "Vorhees" on the chest.
    • He also shares similarities with Bloodsucker, an Arc Villain from the comic who also sucked the mutagen out of Raphael (though it only turned him back into a regular turtle, whereas the Creep turns him into a plant).
    • He also has powers very similar to the Swamp Thing.
  • Silent Antagonist: He never talks, even when he becomes more intelligent after absorbing part of Donnie's brain worm serum several episodes later.
  • Villain of the Week: With a hint of possible return (which happens in "The Creeping Doom").
  • Weapon of Choice: Seems to particularly favor pitchforks.

    The Finger 
https://static.tvtropes.org/pmwiki/pub/images/the_finger.png
Oooooh doggie!
Voiced by: Jesse Ventura

An insane polydactyl hunter who seeks to capture Bigfoot.


    Dream Beavers 
https://static.tvtropes.org/pmwiki/pub/images/dream_beaver_actual_size___by_spyruto99-d86ol5v_7185.jpg
L to R: Dave, Dark, Dire and Dread.
Voiced by: Robert Englund (Dire & Dread), John Kassir (Dark & Dave)

A foursome of demon beavers who stalk the Turtles in their sleep


  • Aerith and Bob: The Beavers' names are: Dark Beaver, Dire Beaver, Dread Beaver, and Dave Beaver.
  • Affably Evil: Dave is actually pretty nice to Michelangelo, even if he is just as dangerous as his brothers.
  • All for Nothing: Bernie's efforts to stay awake and keep the Dream Beavers off of Earth turn out to be completely pointless and counterproductive when they do escape, as all their powers are nerfed, and they wind up as living plushies.
  • Butt-Monkey: Dave Beaver, who gets a lot of shut ups from his brethren.
  • Canon Foreigner: They were created for the series.
  • Color-Coded for Your Convenience: Each beaver has the same color fur as the Turtles' masks, however, they don't match the Turtles. For example, Dave is blue, Leonardo's color but is Mikey's enemy.
  • Death Bringer The Adorable: They have evil names (except for Dave), but they all have an adorable appearance, and outside the dream world, they are completely harmless.
  • Expy: Of the Care Bears.
  • Know When to Fold 'Em: When they make it to the material realm, they're the size of plush toys with almost none of their supernatural powers, so they decide to, instead of pull their luck there, just leave for another dimension.
  • Mythology Gag: Based on the Terror Bears, minor recurring foes from the Palladium Teenage Mutant Ninja Turtles and Other Strangeness tabletop RPG. See also Shout-Out below.
  • Names to Run Away from Really Fast: All of them, except for Dave.
  • Odd Name Out: Dave.
  • Outside-Genre Foe: They're borderline supernatural, like Ho Chan, but unlike him, they're almost unbeatable in dreams.
  • Phrase Catcher: Dave gets a lot of "Shut up, Dave!" thrown his way.
    Beavers: Shut up, Dave!
  • Red Eyes, Take Warning: All the beavers except Dave, who has Moe eyes.
  • Sealed Evil in a Can: The beavers were trapped in the dream world by a book. They happen to be an example where Sealed Evil in a Can was actually more dangerous than opening the can. They are completely harmless and doll-sized outside the book.
  • Shout-Out: They look like the Care Bears, but act very much like Freddy Krueger. Robert Englund even voices two of them.
  • Villain of the Week: Continuing the trend for the first episodes of the third season.

    Speed Demon 
https://static.tvtropes.org/pmwiki/pub/images/b3f071c1e19b3e62510606cce2a934dc.png
Voiced by: Steve Blum

A mutant car that transforms anyone that drives it into a mutant who is thirsty for speed.


    Wyrm 
https://static.tvtropes.org/pmwiki/pub/images/wyrm2.png
Voiced by: Dwight Schultz

A reality bending creator of chaos who was put in a fifth dimensional prison and scattered through out the cosmos.


  • Adaptational Badass: He was just another mutant in the TMNT 80's toyline and the Archie Comics. Here, he's a reality-warping being capable of blowing up entire planets, and possibly one of the turtles' most powerful enemies.
  • Adaptation Species Change: Originally a worm mutant in the TMNT 80's toyline and the Archie Comics, Wyrm's in this series is instead a reality bending being.
  • Ax-Crazy: His "wishes" really cause problems.
  • Be Careful What You Wish For: His modus operandi. And he uses this to gain his freedom. It also becomes the cause of his downfall.
  • Even Evil Has Standards: Played with. He does tell the heroes what they're not allowed to wish for only to grant Raph's laser cannon wish which violated the "you can never hurt a Wyrm" rule, which counts as the third wish freeing him from his prism. He was also able to grant Casey a bonus wish even though he was already exceeded the three wishes limit and was already free. Kind of makes you wonder why he even bothered to tell them the rules if he apparently didn't have to follow them.
  • Expy: Oh come on, for those who know Super Robot Monkey Team Hyperforce Go! it's impossible to not notice Wyrm and Wigglenog are pretty much the same character appearing in an episode with almost the exact same script. They both are Jackass Genies who were imprisoned in a giant fifth dimensional prism until the heroes accidentally came across their prisons and freed them. Their wishes even follow the same rules and a similar pattern. At the end, they get outsmarted by one of the heroes who supposedly joined his side and are forced to grant their wish that they never met.
    • Interestingly enough, when mentioned among the various wish-granting entities, the Wigglenog is pictured as well. Furthermore, one of the showrunners did formerly work on Super Robot Monkey Team Hyperforce Go! prior to TMNT.
  • Hoist by His Own Petard: Casey outsmarts him by making him think the two of them can take over the universe with Casey's new intelligence and his reality warping powers to earn a bonus wish from Wyrm only to turn everything back to normal.
  • Jackass Genie: When the heroes decide not to make a third wish to prevent Wyrm's freedom, he traps Honeycutt's ship in a giant fifth dimensional prism to "persuade" them to make their third wish and grants Raph's "Anti-Wyrm laser cannon" wish even though hurting a Wyrm is against the rules, which shouldn't have counted as the third wish needed to release him.
  • Laughably Evil: When he fights the Turtles, his methods consist of rolling up the Turtles into a giant ball and then whacking them with a baseball bat, turning one of his arms into a hammer and flattening Mikey, and swallowing April's laser blast shots and farting them out.
  • Reality Warper: He's able to change his body at will, wind back time at will, and destroy entire star systems on a whim.
  • Sealed Evil in a Can: He was imprisoned in a "Hypercube", and returns there when Casey hits the Reset Button with his bonus wish.
  • Three Wishes: What he gives, and when all three are granted, he escapes his "Hypercube" and can REALLY do some damage.
  • Wishplosion: Casey outsmarts him by tricking him into giving him an extra wish and then using it to wish the team had never met the Wyrm.

    Overmind 
https://static.tvtropes.org/pmwiki/pub/images/overmind4.png
Voiced by: Jim Piddock

A computer system on a space station that Armaggon chases the Hamato Clan and Honeycutt to. Once he's fully reactivated, he sets out to wipe out all organic life in the universe.


    Za-Naron 
Voiced by: Mae Whitman

A dark Aeon who is revealed to have inhabited April's Aeon crystal, and takes possession of her in "The Power Inside Her".


  • Asshole Victim: For all the things she forced April to do, no one is going to miss her when April kills her off.
  • Big Bad: Of "The Power Inside Her".
  • Canon Foreigner: She was created for the series.
  • The Corrupter: Her influence from within the crystal gave it its addictive properties. Even when her presence became known to April and the others, she still did what she could to convince April what she was doing was the better option.
  • Dark Is Evil: When Za-Naron's Aeon form is revealed, she is as black as night.
  • Demonic Possession: Za-Naron possesses April's body in "The Power Inside Her".
  • Hero Killer: Za-Naron actually destroys Donatello by scattering the molecules that make up his body. Fortunately, April is able to put him back together.
  • Knight Templar: She's disgusted by the corruption of the people on Earth, and intends to wipe out humanity to cleanse the planet.
  • Knight of Cerebus: Za-Naron is no laughing matter; she forces April to do terrifying things and is in one of the most serious episodes of the series.
  • Light Is Not Good: Za-Naron has the same light aura as April when possessing her. Inverted when she is forced into her own body; think of Hsi Wu from Jackie Chan Adventures and you'll have the idea of what Za-Naron in true form looks like. Justified in that Za-Naron is one of the Aeons, and has the same appearance as the dark Aeons from "Riddle of the Ancient Aeons".
  • Not-So-Well-Intentioned Extremist: She claims she's "cleansing" the world of its corruption, but she has no problem with killing everyone on Earth, including innocent people. She enjoyed trying to painfully kill the heroes, giving an Evil Laugh while doing it. And at the end, she was enraged at April for giving up "all the power in the universe", showing that she seemed to be quite power-hungry.
  • Omnicidal Maniac: Kill 'Em All and cleanse the world!
  • Our Demons Are Different: Za-Naron was the disembodied soul of a corrupt Aeon - an Angel-like race of aliens - housed within April's crystal.
  • Single-Stroke Battle: Has one with April. She loses.
  • Shout-Out: When talking to the Turtles and Casey while possessing April, she says, "There is no April, only Za-Naron!".
  • Voice of the Legion: Za-Naron has April's voice both inside her body and in Za-Naron's own Aeon form, but it has an additional voice alongside it.

    Jei 
Voiced by: Keone Young

A black wolf wizard who is Miyamoto Usagi's personal nemesis and claims he "cleanses evil".


  • Adaptational Villainy: While he was far from a saint in the original Usagi Yojimbo comics, he would acknowledge when somebody has a good heart and would drop his weapons, like with Keiko. He also has a genuine delusion that he's hurting evil. Here, he knows full well that he's hurting innocent people and pretends to be doing it for the sake of justice, as his Xanatos Gambit involves making Kintaro good enough for him to possess.
  • Arch-Enemy: After he kills a family in the first scene of the Miyamoto Usagi arc, Jei immediately becomes this to Usagi, and they fight. Jei's goal is to "cleanse" Usagi of "evil", hence him summoning the Turtles to do the job for him.
  • Dark Is Evil: Jei is a black wolf, wears a black kimono, and has black hair with a black topknot. His first scene is him murdering an entire family and he's the main antagonist in the alternate Feudal Japan.
  • Demonic Possession: Jei attempts to do this to Kintaro after his spiritual powers are awakened.
  • Disney Villain Death: Jei's fate in "Kagayeki Kintaro", after Kintaro bites his arm and Usagi takes Leo's blade out of Jei's chest, sending his body into a freefall.
  • Evil Sorcerer: The second one in the series after Ho Chan. Jei's powers involve hypnotism and summoning.
  • Impaled with Extreme Prejudice: Leo throws one of his katanas directly into Jei's chest to halt the transfer of his soul into Kintaro's body.
  • Kung-Fu Wizard: While a powerful wizard already, Jei is also a formidable fighter with a spear and skills that match Usagi.
  • Prophet Eyes: Jei has blank white eyes to go along with his black and white color scheme.
  • Would Hurt a Child: He slaughtered an innocent family, presumably one with kids, because he claimed they were evil. He also tried to possess Kintaro.
  • Wounded Gazelle Gambit: Jei is the one who summons the Turtles to his dimension, and then he immediately passes himself off as a frail man to get close enough to hypnotize the Turtles into killing Usagi.

    The Mummy 
https://static.tvtropes.org/pmwiki/pub/images/tmnt_pharaoh.png
Voiced by: Grant Moninger

The mummy of an ancient Egyptian pharaoh, revived by Savanti Romero to help him conquer the world.


    Count Dracula 
https://static.tvtropes.org/pmwiki/pub/images/drac.png
Voiced by: Chris Sarandon

The Lord of the Vampires himself, forcibly recruited by Savanti Romero to help him take over the world.


  • Actor Allusion: This is not the first time Chris Sarandon has played an evil Vampire Lord.
  • Arc Villain: Of the Monster Arc in the fifth season, alongside Savanti Romero.
  • Badass Boast: Gives one to Leo in "The Frankenstein Experiment":
    Dracula: I am the Lord of the Undead! The King of Wallachia! No one has ever defeated me!
  • Classical Movie Vampire: He fits the bill perfectly. Slicked-back black hair? Check. Villainous Widow's Peak? Check. Black tuxedo complete with Ominous Opera Cape and High Collar of Doom? Check. Eastern European accent? Check.
  • Demoted to Dragon: He's forced to serve Savanti, and is not happy about it.
  • Dragon-in-Chief: He's forced to become Savanti's dragon, but he's still the one in charge of the monster army Savanti has gathered.
  • Didn't Think This Through: In "Monsters Among Us!", he attempts to steal the Time Scepter for his own purposes, but it fails because he doesn't actually know how to use it.
  • Dracula: But of course.
  • Early-Bird Cameo: He's briefly seen in the beginning of "The Curse of Savanti Romero," watching April and Casey from a nearby alley. He's properly introduced in the next episode, "The Crypt of Dracula."
  • Family-Unfriendly Death: In "Monsters Among Us!", he's impaled with Donnie's staff on screen and quickly decays into a skeleton, complete with a lovely shot of his exposed muscles.
  • The Starscream: As early as "The Frankenstein Experiment", he's plotting to usurp Savanti. He makes a bid in the next episode by trying to steal the Time Scepter for his own purposes, planning to turn early humans into vampires under his control. It fails because Dracula doesn't know how to actually work the scepter.
  • Villain Team-Up: With Savanti Romero.
  • Weakened by the Light: Savanti uses it to his advantage by threatening him with an ultraviolet light.

    Verminator Rex 
https://static.tvtropes.org/pmwiki/pub/images/chainrex.jpg
Voiced by: Nyambi Nyambi

A mutant honey badger, and the leader of the Honey Badger Ravagers in the Mutant Apocalypse timeline.


  • Artificial Limbs: He has a cybernetic arm, with a built-in chainsaw.
  • Canon Foreigner: He was created for the series.
  • Chainsaw Good: He has a cybernetic chainsaw arm.
  • The Dragon: To Maximus Kong, who he refers to as his master.
  • Expy: Of Verminator-X from Teenage Mutant Ninja Turtles Adventures, another mutant cyborg villain from a future timeline. However, he is considered a different character instead of an outright adaptation due to the changes in name (X to Rex) and species (cat to honey badger).
  • Hypocrite: He has the gall to accuse Raph of cheating in a fight. Considering the fact that he and Reptilicus ganged up on Raph in a 2-on-1 fight, and they were armed while Raph had nothing more than a stick, he has no room to talk.
  • Sore Loser: When Verminator Rex loses the fight with Raph and got his cybernetic arm torn off he starts whining that he cheated note  and goes crying to Maximus Kong.
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