Complete Monster/Cartoon Network

"You are alone, child. There is only darkness for you, and only death for your people. These ancients are just the beginning. I will command a great and terrible army... and we will sail to a billion worlds. We will sail until every light has been extinguished. You are strong, child. But I am beyond strength. I am the end. And I have come for you, Finn." —The Lich to Finn, Adventure Time, "Escape from the Citadel"

What Do You Mean It's for Kids? taken to a particularly dark extreme.

While most villains from Cartoon Network and Adult Swim are mostly Jerkasses at their worst, there are some who take their villainy to the next level. Ben 10, Jonny Quest and Ninjago have their own pages.

Adult Swim

• The Boondocks:
  • Ed Wunceler II, the overarching Big Bad in Season 4, manages to be even worse than his already horrible, crooked and racist father, as he's an outright slavedriver and primarily does it For the Evulz rather than concern for money and business. When introduced, he cons Robert Freeman several times specifically to drive Robert desperate enough to sell himself into slavery in order to pay his debts. Ed II then forces the whole Freeman family, along with his numerous other debtors he got to sell themselves into slavery, to litearlly slave away for him in his new theme park, the ironically named Freedomland. Not only does his mistreatment of his slaves go into very uncomfortable territory, but he also shows he doesn't care about hurting children, as several children are seen in his slavery park and he later attempts to slice off Huey's foot when Huey begins acting rebellious and defiant.
  • In "Smokin' With Cigawettes", we had Lamilton Taeshawn, who was a slight parody, but still monstrous none the less, and only at the tender age of seven. What made him so horrible you may ask? He recklessly drove around endangering people's lives and refused to apologize when his grandmother asked him to. He proceeded to violently brutalize her when she refused to buy him fried chicken. After that atrocity, he used the same car to spray a combination of urine and hot sauce at innocent people and dropped a doll off a freeway just to cause traffic problems. If that wasn't enough, he then stole her handgun and used it to blackmail Riley into being his friend, planned to rob Ms. Van Housen's house for no reason, and then shot her dog. He shot her dog because he claimed it would bite him, despite the fact that it was chained at the time and nowhere near him. His psychiatrist, Dr. Doomis (a spoof of Dr. Loomis from Halloween), tried rehabilitate him by spending the last 2 years trying to get him into the system and away from society. When said psychiatrist finally turned him into the police for the dog shooting, he blamed Riley, stalked him, and tried to strangle him to death. In the end, he was so evil that the aforementioned psychiatrist leaped from a building just to finish him off after he had fallen off it. The real kicker is that Lamilton is based on an actual kid, who really did take a joyride in his grandmother's hummer and later attacked her over chicken wings. Some of the things Lamilton says are quoted from him.
• Moral Orel actually has one clear-cut example, but surprisingly it's not Clay Puppington, it's Cecil Creepler. He's a pedophile ice cream man who tries to lure kids into his van with treats. One of his intended victims is Shapey, a seven-year old with a mental age of three. Season Three really pushes him into this with the reveal that after failing to lure 12-year-old Doughy Latchkey into his van, Creepler became a prolific serial rapist who targeted dark-haired women. Assaulting seven women, Creepler's last victim was schoolteacher Miss Agnes Sculptham when she dyed her hair black to compel him into entering her apartment. Despite his death, Miss Agnes suffers a psychological breakdown upon hearing the news, making it self-evident how broken she had become because of his actions. The episode was so dark it partially led to the series being cancelled.
• From Rick and Morty, King Jellybean was the former ruler of a village Rick and Morty saved from poverty who was secretly a monstrous pedophile who attacked and raped children for pleasure as a hobby whenever he felt he could get away with it. Unlike most other antagonistic characters on the show, King Jellybean was NOT played for laughs at all, as he pretends to offer advice to Morty before dragging him into a bathroom stall and trying to rape him in a moment that is very uncomfortable and traumatic for Morty. When Morty tells Rick what happened to him, Rick is so disgusted that he casually kills King Jellybean without hesitation just before they leave his village behind.
• Samurai Jack:
  • Aku is the self-proclaimed Shogun of Sorrow, the shapeshifting master of darkness, and the Arch Enemy of Samurai Jack. Born from an ancient darkness mixing with a magical elixir, Aku immediately unleashed his unspeakable evil onto the world. Stopped from ravaging the land by the Emperor, who locked Aku away with the help of a powerful sword, Aku eventually escaped his confinement and enslaved the Emperor and his people. When the Emperor's son opposes Aku with the magic sword, Aku casts the "foolish" samurai warrior into a future where Aku's evil is law, and the entire galaxy suffers under his reign. The Earth is transformed into a Wretched Hiveand haven for evil-doers across the universe, while entire races are enslaved or exterminated by Aku's whim. Any of Aku's subjects who show dissent to his rule are executed or, worse, sentenced to the "Pit of Hate". Aku regularly makes alliances with those around him, only to gleefully stab them in the back in the most painful way possible for nothing but sadism's sake, and any minions serving him are abused and disposed of for the slightest of failures. One of Aku's worst actions was when he trapped a Viking warrior as an immortal statue, forced him to watch as his family and land were destroyed, then buried the warrior alive so he could never reunite with his people in Valhalla. Aku also blesses the child-abusing Cult of Aku with his essence to inspire their further villainy, and when Jack's quest to get back to the past inspires a rebellion against Aku, Aku slaughters the rebels and kills the Scotsman. After horrifically turning his own daughter and Jack's Love Interest Ashi into a mindless slave so she'll be forced to kill Jack for him, Aku tampers with Jack's time portal, tricks him into stabbing Ashi, and tries to trap him in a time loop of suffering so he can never undo the future that is Aku.
  • In the Darker and Edgier fifth and final season, the High Priestess is the leader of the Cult of Aku, and a fanatical zealot dedicated solely to appeasing the dark god she worships by any means necessary. Drinking Aku's essence and giving birth to septuplets with Aku's dark energy within them, the High Priestess dubs them the Daughters of Aku and proceeds to horribly condition them into unfeeling weapons who's sole purpose is to kill Samurai Jack. The High Priestess systematically abuses them for years on end, searing their flesh with hot coals while they're still young and putting them through brutal, life-or-death training routines where every slight distraction means torture and beatings — sometimes simply for things as minor as looking outside. Having the Daughters graduate by having them massacre her own devoted followers, the High Priestess sends the Daughters into the world to kill Jack and callously brushes off the deaths of most of them at Jack's hand, even furiously attempting to kill Ashi, her only surviving daughter, with her own hands after she finally turns on the High Priestess and sides with Jack. An unfeeling fanatic who'd sold her soul to darkness and is able to rival her own dark god in evil, the High Priestess justifies her cruelty simply by stating Jack must die at any cost, even if that cost is her own flesh and blood.
  • In that same season, the Dominator is a sadistic Torture Technician seemingly motivated purely by a desire to hurt people. Slaughtering a village of innocents and abducting all of their children, the Dominator painfully transforms all of the children into psychotic killing machines to be used as weapons, and tests them out on Jack and Ashi once they try to retrieve the children, with complete knowledge Jack's refusal to hurt innocents makes him easy prey. The Dominator brutally tortures Ashi upon capturing her with clear lascivious intent, gloating that children are easily manipulated tools — and that Jack's refusal to hurt them only makes him a "righteous fool."
• Dan Halen from Squidbillies. He is, in one episode, actually called the personification of evil and a blight on the human race that predates recorded history. Actual examples are shown, such as being a ranking officer in Hitler's Third Reich, spreading the bubonic plague in medieval Europe, causing the extinction of the dinosaurs, and nailing Jesus to the cross. He also overloaded the Large Hadron Collider to intentionally create a black hole to dispose of a prostitute's body, then throws his own mother in as an afterthought.

Dan Halen: Do you think this is the only illegal thing I have to do today?

• The Venture Brothers:
  • Dr. Jonas Venture is the self-absorbed and abusive father of Thaddeus "Rusty" Venture who poses as a noble and beloved adventurer and scientist. Taking Rusty on dangerous adventures since he was three years old, Jonas allowed him to be trapped, tortured and put in harm's way, to allow himself the excitement of "rescuing" Rusty as the hero. When working on scientific inventions, Jonas frequently grew bored of his works with dire consequences, in one instance leaving a group of orphans to suffer drug-induced nightmares after an A.I. he created ran rampant, much to Jonas's apathy. His own team meaning nothing to him, Jonas viewed his bodyguard as property, taking him from his "best friend" Blue Morpho as "payment", and turned another into a violent Blood Knight by forcing him to use dangerous drugs. Ruining Morpho's life, Jonas coerces the happily married man into an orgy, then blackmails Morpho with the knowledge and forces him to do his dirty work, and later resurrects Morpho into a cyborg slave, which earned the disgust of his team. After spending several decades in a mostly-dead state, Jonas attempts to have the cyborg Morpho killed so that he may steal his body for himself, and then flies into a rage and tries to do it himself once this order is refused. Killing any villains he grows bored of, Jonas shows under the exterior of grand heroics he paints himself with to be an utterly despicable Psychopathic Manchild.
  • On the surface, Professor Impossible is a dorky Mr. Fantastic Expy. But then you find out he keeps his wife isolated because her powers were useless to him. When Rusty Venture nearly has an affair with his wife, Impossible responds by leaving him to die in the cold. Brock is barely able to save him, and when he tries to get Ventures' son, Hank, treatment (he'd recently swallowed a serum that made him a living bomb), rather than help him, he was ready to shoot. In his second appearance, he's still keeping Sally imprisoned and acting artificial and cold towards his own infant son, to the point of forgetting he even exists. Then he breaks down when his wife finally leaves him and is coerced into becoming a supervillain by Phantom Limb, who says it's not much of a stretch for Impossible. He's not joking. A later episode reveals that he's been using Sally's brother Cody, who's skin bursts into flames when it comes into contact with air, as a power source by constantly keeping him awake, and therefore in constant pain. And he doesn't even show the slightest hint of guilt for any of this. Bastard.

Cartoon Network

• Adventure Time:
  • The Lich is an evil, ancient sorcerer and the "last scholar of GOLB", who returns time and time again from seeming destruction focused solely on one thing: the destruction of all life. First mentioned in passing at the end of Season 1, in reference to his defeat at the hands of the hero Billy, we meet him in person in the Season 2 finale. He's an Omnicidal Maniac, not because of some great tragedy in his past that's explained to us - he just wants to wipe out all life. He almost takes control of Finn with his Compelling Voice and takes up Body Surfing at the destruction of his physical body, turning Princess Bubblegum into an Attack of the 50-Foot Whatever Eldritch Abomination. He later ends up killing and possessing the body of Billy as part of a complex gambit to get a Reality Warper to grant his wish for the extinction of all life across The Multiverse; murdering dream Prismo as well as Prismo's physical body, the latter solely For the Evulz, then breaking the universe's worst criminals our of their cosmic jail, all in order to create an unstoppable army for himself to lead in wiping out all life, one planet at a time. He ends up getting turned into a harmless baby named Sweet P afterwards, but even then, a version of the Lich from a parallel reality attempts to turn Sweet P back into his former self as his last scheme. The Lich is also heavily implied to have been involved with the destruction of mankind and one of the reasons why the show takes place in a world After the End, as his ongoing quest is to eradicate all life forms simply because he desires to be the end of all things, and unlike GOLB's other spawn, the Lich is fully sentient and aware of what he does. Permanently changing the tone of a once-zany show with his presence, the Lich and his endless devotion to death immortalize him as the most horrifying villain in the series.
    • The "Farmworld" iteration of the Lich is the aforementioned parallel reality version of the Lich that possessed the body of an parallel version of Jake the Dog. He manipulated that world's version of Finn to gain access to the multiverse and build up a mountain of broken bodies, later mentally torturing Sweet P for nights on end to try and turn him back into the original Lich. In the finale of Distant Lands, Farmworld Lich manipulates New Death into killing his father and uses him as a puppet to annihilate the cycle of reincarnation and stop new life from blooming.
    • The Lich is as vile in the comic book canon as he is in the cartoon, continuing his crusade to destroy all life after his defeat in Princess Bubblegum's body, taking physical form again to use a Bag of Holding to suck up thousands across Ooo, with the ultimate intent to suck up the entire planet and throw it all into the sun. Even destroyed, the remnants of the Lich's power continue to horrify and torment Finn, with an echo of the Lich's power creating a dungeon to Mind Rape the heroes — taunting the Ice King/Simon Petrikov with an image of his old love Betty and forcing him to watch as she fell apart in hopes of it breaking his spirit and driving him to suicide — and twisted a sentient tree into a horrible monster, both in preparation to eventually recuperate and destroy life again.
  • Dr. Gross, from season 7's "Preboot" and season 8's "Islands" miniseries, was formerly a scientist and doctor on the series of islands founded by Minerva Campbell as a refuge for the remnants of humanity, training children to become "Seekers", with no hesitation in brainwashing them and having them brutalize their own friends to prevent any escape from the islands. Dr. Gross eventually turned to twisted experiments on sentient beings, with her recklessness accidentally unleashing a virus that killed off two-thirds of all humanity on the islands—to her complete apathy. Escaping the islands, Gross continued her experiments, scheming to return to the islands and forcibly augment all humanity into cybernetic abominations like herself, even trying to cut apart Finn and his friends to use as raw material. An unfeeling scientist with zero empathy, Dr. Gross proves that, sometimes, Humans Are the Real Monsters.
  • Distant Lands, "Wizard City": Dr. Caledonius, supposedly a Cool Teacher at Wizard City's school for preeminent young wizards, is actually a deranged cult leader worshiping an Eldritch Abomination named Coconteppi. Caledonius takes an obsessive interest in the amnesiac, childlike Peppermint Butler, knowing he used to be the most evil dark wizard in Ooo's history, and so she manipulates and corrupts him into drinking the ichor of Coconteppi and becoming the monster's host, all so that he'll annihilate Wizard City and usher in the "Second Age of Terror". Caledonius has no compunction murdering her own teenaged students; she murders Spader in a failed ritual to summon Coconteppi, then remorselessly orders Peppermint's friend Cadebra murdered when she tries to help him break out of Coconteppi's influence.
• Captain Planet and the Planeteers:
  • Zarm, the Spirit of War and Destruction, is arguably the strongest and most deadly adversary of Gaia and the Planeteers. A former Spirit of the Earth exiled by Gaia, Zarm dedicates himself to bringing ruin and destruction in all forms to Gaia and all she protects out of vengeful spite, having consumed at least one planet to the tides of destruction and constantly attempting to do the same to Earth. Zarm attempts to initiate all-out nuclear war on Earth; painfully reverts Gaia to a withered old lady incapable of stopping the Earth from dying and taking over the Earth for a ten-year-period of time where the Earth has become desiccated and ruined; coins a strategy he calls "Scorched Earth" by convincing world leaders to obliterate their own land and people—and claims to have been "a part of every important tyrant in history"—and nearly dooms the Planeteers' efforts to stop an alternate timeline where the Eco-Villains' descendants rule the planet by smugly ordering a young girl Ma-Ti saves murdered. A sadist drunk on his own capacity for destruction, Zarm is one of the single greatest sources of human misery within the show.
  • The appropriately-named Verminous Skumm is a humanoid rat-man who, despite being far less powerful than Zarm, manages to be just as evil. Taking a sick pleasure in the polluted and festering, Skumm's schemes vary from willingly endangering and trying to destroy entire cities, and include deliberately trying to destroy an entire city with a cloud of acid rain and flooding Venice with oversized, carnivorous rats; peddling mind-altering drugs and even murdering Linka's cousin Boris through them; attempting to bait two sides of the Arab–Israeli Conflict into using a nuclear bomb in Jerusalem Mount, as well as bringing nukes into The Troubles and apartheid South Africa; and attempting to flood the entire world with his "Rat Rot" chemical to turn everyone into his mutated rat slaves. Skumm's end goal is to destroy the civilized world and enslave what remains to his mutated Rat Men followers to rule over them all as a king. Happily admitting "I'm ignorance; I'm fear; I'm hate" and taking delight in everything from ruining the life of a single person—a teenager with AIDS—for giggles, to the attempted annihilation of millions of lives, Skumm stands out as the darkest of the recurring Eco-Villains due to his propensity to target people rather than the environment.
• In Code Lyoko, XANA is a rogue multi-agent program living on the virtual world Lyoko that evolved to the point of achieving sapience. Gaining a desire to rule over and/or destroy humanity, XANA tries to kill his creator, Franz Hopper, as well as his daughter Aelita. Trapped inside the supercomputer for a decade, once revived, XANA regularly launches many vicious schemes upon the real world, not caring about the sheer amounts of potential casualties that would result from the attacks. XANA shifts strategies to absorbing Aelita's memory to gain the power to leave the supercomputer and into the network, the success of which nearly killing Aelita in the process. Using the internet to access supercomputers across the world, XANA gradually builds a robot army to rule over humanity. In the mean time, XANA tries and almost succeeds in destroying Lyoko, taking William as his personal avatar and slave to his will. When Lyoko is revived, XANA decides to lure out and kill Franz Hopper by using Aelita as bait and plans on keeping the latter as his eternal prisoner. In the one episode where he appears before the heroes, XANA shows sadistic enjoyment in trying to kill them all.
• Codename: Kids Next Door had one in Grandfather from Operation Zero. While the rest of the villains were funny or sympathetic to some degree, Grandfather has zero redeeming qualities. He's an Evil Overlord who ruled the world with an iron fist a long time ago, before being defeated by Numbuh Zero. His first act after being revived is to try to turn everyone in the entire world into SenorCitizombies just because kids annoy him. Unlike the other villains, Grandfather doesn't value family, being an utterly Abusive Parent. His Moral Event Horizon is turning Father into the fucked-up person he is, making him responsible of every bad thing that happened in the series. Not even his "love" for his favorite son is a redeeming factor, since he tried to burn him with no remorse.
  • What's even worse is that his slaves were shown working in his Industrial Age factories, and to anyone who paid attention in history class, that actually did happen and it was a Fate Worse Than Death.
    • Even worse: in Real Life, the factories were at least building something useful. Grandfather made them work like slaves to create tapioca pudding, solely for his own consumption. He made children work like slaves for something completely trivial and solely for himself.
• Courage the Cowardly Dog:
  • Katz is the most recurring villain on the show, as well as one of its most evil. While his motives tend to change, none of his motives are ever sympathetic, with him committing evil mainly for his amusement. In his first appearance, he ran a Hell Hotel where he fed all his guests to spiders for no explained reason. In a later episode, he ran a health spa where he transformed his guests into machines and forced them to fight for his own amusement. There was also that one time he got tired of winning second place at the annual sweets baking contest. His plan to prevent this from happening? Kidnapping the champion and turn her into taffy.. In his fourth appearance, he tried to blow up a submarine that was full of people. In short, he's an Ax Crazy Serial Killer played straight on a kids show.
  • "The Great Fusilli" gives us the titular crocodilian himself. Fusilli initially seems like a charming (if somewhat sinister) traveling magician taking his show on the road, and allows Courage as well as his owners Eustace and Muriel to perform for an imaginary audience. However, his true evil nature is revealed when Courage stumbles upon a back room full of lifeless human puppets. It turns out that Fusilli is a Serial Killer of sorts who uses enchanted strings that turn people into lifeless puppets, effectively killing them so he can play around with their lifeless bodies for his entertainment. Despite only having one appearance, The Great Fusilli still stood out as one of the most terrifying vllains (along with his episode) on the show.
  • Mad Dog from "The Mask" is an abusive, possessive, and violent gangleader who is horribly abusive to his girlfirend Bunny, and buries her up to her neck when she tries to run away from him. Refusing to let Bunny see her best friend Kitty, he threatens to bury the two of them if Kitty tries to visit her. The second time she runs away, he attempts to run her over with a car when she tries to escape with Courage. While he acts compassionate to her when he makes her upset, the rest of his behavior makes it rather obvious that he's just trying to manipulate her into remaining under his paw. As a side effect of his actions, Kitty comes to the conclusion that all dogs are bad, though Courage is able to persuade her otherwise.
  • From "Queen of the Black Puddle", the titular Black Puddle Queen is a man-eating siren who uses bodies of water to travel from her underwater kingdom and hunt for humans. With her Compelling Voice and sultry appearance, the Queen hypnotizes men into following her to her castle, where she performs a ritualistic ceremony before eating them alive. The Queen has filled her kingdom with the skeletal remains of her hundreds—if not thousands—of victims, and she tries to subject Eustace and Courage to the same fates. She later joins a villainous alliance to take Muriel hostage and destroy Courage in a slow, painful way out of nothing but annoyance that Courage thwarted the Queen's last scheme.
  • From "The Quilt Club", Eliza and Elisa, known as the Stitch Sisters, are the owners of an antique quilt shop and reclusive quilting club who make Muriel work day and night to pass the standards they use to admit those into their club. The club itself is a front; since the dawn of humanity the Sisters have walked the Earth, ensnaring the souls of women to prolong their own youth and binding them forever to their quilt. The souls of their victims are kept within the quilt for centuries on end, forever ripped of everything that once made them unique.
• Dexter's Laboratory: In the episode "Jeepers Creepers, Where Is Peepers?", the anime-esque Hookocho, "prince of pain and misery", is a power-hungry and cruel alien warlord who would happily destroy anything that stands in his way of galactic domination. Coming to Koosland to abduct its guardian, Peepers, for the purpose of absorbing his limitless power to energize his space fortress' secret weapon, Hookocho sets Koosland ablaze with this power, intent on erasing Dee Dee's world from the face of Imagination and using his newly enhanced powers to dominate the galaxy as he pleases. When Dexter and Koos come to rescue Peepers, Hookocho sends his forces out to kill them, and when they break into his room to face him, he zaps them with his electic magic, forcing them to watch as Peepers is tortured by the power absorbing device and put through horrific Body Horror. But the hatred and rage inside of Peepers is enhanced too, mutating him into a dragon and promptly stomping and killing Hookocho just as he's gleefully torturing Dexter and Koos with his electric magic, intent on killing them just for kicks
• Green Lantern the Animated Series:
  • The aptly-named Atrocitus is the leader of the Red Lanterns and the reason that Razer's wife is dead. He is dedicated to the destruction of the Green Lantern Corps, having many of them murdered by his Red Lantern followers. First showing his ruthlessness in ordering a colony world full of innocent civilians destroyed, Atrocitus later revealed he had destroyed worlds to fill survivors with rage and recruit them as Red Lanterns. Unlike his comics counterpart, a Tragic Villain at worst and an Anti-Hero at best, Atrocitus in the show delighted over the pain he caused innocents and took sadistic pleasure in his actions. Even though he himself had once lost a homeworld, he gloated over inflicting the same agony on others like Razer.
  • Myglom is a seemingly moral warden of a Green Lantern prison, but is in actuality a sadist who masks his villainy as a "rehabilitation program". Myglom subjects dozens of prisoners to a Mind Rape machine that makes them relive their worst memories over and over again before webbing them up to be devoured at his leisure. When Hal Jordan and Kilowog deliver the Red Lantern Razer to Myglom's prison, Myglom subjects Razer to the same torments of his other prisoners, and when Hal and Kilowog realize Myglom's villainy, he captures them and plans to eat them alive after using his nightmarish machine on them.
  • Prince Ragnar, brother of Queen Iolande, is an unfathomably petty, spiteful narcissist. Craving the power of a Lantern so as to rule his world, he poisoned his life-long mentor Dulok to get his Lantern ring and later tried to do the same to Kilowog, believing himself the only one worthy of its power, before attempting to slit his own sister's throat to ensure if he couldn't rule, neither could she. In his second appearance, Ragnar's rage earns him a place in the Red Lanterns ranks, taking over his world with them and waging war on any resistance. He would then have the Red Lantern Corps plant a "Liberator" on his world, intending to exterminate his own people of 2 billion lives, simply to spite them all for not wanting him as a ruler.
  • The Anti-Monitor is an Omnicidal Maniac obsessed with nothing less than the obliteration of everything in the universe that isn't himself. Built to be a knowledge-gathering robot, the Anti-Monitor quickly realized his superiority to all life in the cosmos, and was banished to another dimension soon after his proclamation to destroy everything in his path. The Anti-Monitor proceeded to turn trillions of planets in this alternate dimension into antimatter which he then consumed to make himself stronger, and, though making a deal with the last remaining planet's population to not consume them should they build him a portal back to his own dimension, the Anti-Monitor drained their sun of nearly all its life before he left, ensuring that the planet would still die soon after he was gone. Once back in his home dimension, the Anti-Monitor reactivates the Manhunter robots across the universe and orders them to kill everything they see, and, when confronted by Hal Jordan, tries to force him to watch as first his friends, then entire worlds, are consumed before him. Even when beaten, the Anti-Monitor desperately tries to strike a deal with Aya to assist her in her plans to destroy reality itself to save his own hide. A megalomaniac who couldn't stand anything living except himself, the Anti-Monitor's narcissism was only matched by his petty sadism.
• Hero: 108: Twin Masters is a malevolent entity who wishes to plunge the Hidden Kingdom into everlasting chaos. Originally a prince with aspirations of conquest, Twin Masters had since become a master of chaos energy, altering their plans to decimate the Hidden Kingdom and lord over the remains as a despot. Several of Twin Masters's plans are designed to cause massive damage, including forcing Oyster-Rahmas into draining the oceans; trying to revert all life to its prehistoric state; changing the course of an asteroid to crash into Hidden Kingdom; creating a chaotic storm with Mighty Ray's eyes; and, in the finale, absorbing all life energy into themselves as well as condemning their former minions to die alongside Hidden Kingdom. Forming a deep hatred for First Squad—Lin Chung in particular—Twin Masters corrupts Commander ApeTrully with their chaos energy and forces him to attack First Squad against his will. Drunk on their love for carnage and destruction, Twin Masters darkened the setting of an otherwise lighthearted show.
• Krytus, the 3rd Big Bad from Hot Wheels Battle Force 5. He's known as the most malicious being in the entire multiverse (this was said by another Big Bad!) and evil incarnate. He restarted a eons old war between the Red and Blue Sentients simply because he saw the Blues as weak and inferior and desired to conquer the entire multiverse. When Sage froze the Red Sentients, the war continued and Krytus carried out a genocide on the Blues. At one point, it's revealed that he had several thousand Blue Sentients tortured to death and the one who managed to enter hibernation to escape him was punished by having his body sabotaged, dooming him when he woke up. Krytus's first action after being freed from his prison is to throw the one who released him off a cliff! He then spends most of the series trying to kill Sage (his own sister), who is a pacifist who only wants peace. At one point, after being forced into an Enemy Mine with Vert to escape the Shadow Zone, he sets up an ambush for Vert the moment they're out of it, unlike previous villains who normally had the honor to let the Battle Force 5 go after an Enemy Mine. Not even the other villains are safe from his wrath, as he starts an Enemy Civil War among the Vandals through Grimian. But what solidifies this is at the season finale, when he and Sage finally have a confrontation. After asking Sage Was It Really Worth It? to imprison the Red Sentients, she replies that if she hadn't, Krytus would've endangered not only the Blue Sentients, but the entire multiverse. Krytus actually agrees with her, fully admitting that not only does he know what he's doing is evil and wrong, he doesn't care so long as he can conquer the multiverse. The only reason he tried to free the Red Sentients was because he wanted an army to conquer the multiverse with, not out of concern for them. He's also the sole Big Bad to earn a Fate Worse Than Death, being imprisoned in ice on another world for all eternity.
• In Martin Mystery, a series filled with supernatural beings and monsters that have some semblance of redeeming traits, the ghostly Gatekeeper from season 2's “They Came from the Gateway” is wholly bereft of them. Keeper of the gateway to the underworld and longing to take over the human world, the Gatekeeper violently turns the head of the Center, MOM, into his slave and proxy while sending out monsters to kill her young agent. Hungering to “feast on the bones” of anyone who opposes him, the Gatekeeper's ultimate goal is to swarm the entire world with monsters from the underworld and rein in the bloody slaughter of mankind, even managing to unleash his monsters on several populated cities throughout the planet to wreak wanton havoc before he's ultimately stopped.
• Over the Garden Wall: The Beast is the appropriately named evil entity that dwells in the forests of The Unknown. He lures victims and sings to them, convincing them to let despair take them over and die, so that they could turn into Edelwood trees. The oil within the trees is their souls and he uses them to keep the flame of his lantern, which houses his own soul, lit to live. While it may seem he's attempting to survive, his actions make it clear it's out of a desire to live on to claim more victims. He fools the Woodsman into thinking he murdered his daughter and trapped her soul in the lantern so that he'd chop the trees and grind them for him while he moves on to find more victims. He takes interest in Greg and Wirt and stalks them throughout the mini-series. When Wirt falls into despair, Greg offers to take his place. The Beast makes Greg do pointless tasks that he says will help them get home when in fact they are meant to exhaust him so he'd freeze to death. At the end, he makes the same deal to Wirt as he did to the Woodsman, clearly lying because he knows Greg will die and Wirt will spend the rest of his life as the Beast's pawn. An unfeeling demon who views all around him as pawns and food, the Beast cements himself as the most vile creature in Cartoon Network's first mini-series.
• Pictured above: The one-shot villain Professor Dick Hardly from The Powerpuff Girls, despite being human, is more of a monster than most villains of the show. Introduced as the sleazy college roommate of Professor Utonium, Dick quickly sees the potential of the Powerpuff Girls as a way to get rich quick. Getting the girls to supply him with Chemical X, Dick makes his own knock-offs of the girls and starts a business selling these copies as superheroes. Due to Dick's greed, however, these knock-offs have been created with minimum materials and Chemical X, meaning that, even though they are aware, they are mentally stunted and physically deformed. When the effort of superheroing causes the knock-offs to literally fall apart, Dick's happy because it means he gets to sell even more copies. At one point Dick notices one of his knock-offs is a perfect Buttercup copy, his response is to order the girl melted down for her "excessive" Chemical X. The episode's climax has Dick capturing the Powerpuff Girls and killing them slowly by draining them of their Chemical X while their father was watching. When Utonium offers to be a slave, making Chemical X for Dick for the rest of his life if Dick will let the girls live, Dick only laughs and says he'll kill the girls and keep Utonium as a slave. Greed incarnate, Dick was notable for being the only villain on the show to be played completely straight, with no humorous quirks to detract from his viciousness. He's one of the show's most evil and memorable villains despite only appearing once in the entire show, and the sole human character in the show to die.
  • The only recurring villain considered to be even close to pure evil is Him, who's actively described as the most evil being out there. That's right: in the context of the Powerpuff Girls universe, Dick Hardly is worse than the Devil.
• Regular Show: While this show's villains are usually too absurd, standard, or honorable to count, there are three exceptions that manage to stand out as particularly despicable:
  • Terror Tales of the Park: II's "Party Bus": The Party Bus driver is a cackling, sadistic skeleton who tricks random people into getting into his bus so they can "party until they drop". Tricking Mordecai, Rigby, Eileen and Margarett into getting into the bus by pretending to be their taxi, the driver gets a dozen people to die of old age, thanks to the paranormal properties of the party bus. Being begged by the protagonists to stop the bus, the driver refuses by stating that “the party is not over yet” before sadistically laughing as a maniac and driving faster, causing them to grow old even faster, which eventually caused the deaths of everyone in the bus.
  • The Christmas Special: Quillgin is an evil elf who used to be Santa Claus’s lead toy designer. Having come up with “the perfect gift”, which uses dark magic to grant the user whatever they desire, corrupting them as a result, he gets angry at Santa for rejecting the gift and destroying his life’s work, and swears revenge on him by destroying Christmas. Having stolen his prototype gift, and shooting Santa to near death, he raids East Pines in order to retrieve the gift, trying to kill the Park Workers in the process, and even almost succeeding. With gift in his possession, he wishes for the destruction of Christmas forever, by planting explosives all across the world and almost orchestrating a planet-scaled genocide.
  • The Movie: The future version of Mr. Ross is Mordecai and Rigby's former gym and science teacher who seeks revenge on the duo for ruining both his championship game and his life. Having weaponized a Timenado, Mr. Ross uses it to erase great chunks of Earth’s history in order to erase time, and consequently, existence itself. Having murdered most of the park crew in the future, he then he travels back to Mordecai and Rigby’s high school days so that he can ensure the Timenado is created, and forces Rigby to read his college rejection letter in order to ruin his and Mordecai’s friendship. Petty and vindictive like no other villain in this series, Mr. Ross risks the destruction of time itself just to get back at Rigby for his mistake all those years ago.
• Believe it or not, Scooby Doo has had these!:
  • The last-revealed villain of Zombie Island, Jacques. He seems like a Nice Guy at first, a jolly old Mr. Exposition. But it's a lure to get people to trust him, so he can take them to Moonscar Island where he and his accomplices suck out their souls, turning them into zombies and gaining immortality. His initial appearance contrasted with the revelation of his evil deeds and his true nature makes him chillingly similar to a believable Serial Killer. Unlike the other 2 antagonists of the piece, Woobies Destroyers of Worlds who were cursed by accident, and now have to kill to live, he accepted the curse willingly, and with full knowledge of the fact that he'd have to kill probably thousands. Not only does he have no problem with that, but he enjoys it!
  • In What's New, Scooby-Doo?, despite his extremely límited screentime due to being long dead before the series, the unnamed lighthouse keeper from "Fright House of a Lighthouse" Is quite a bastard. During one stormy night, the Lighthouse Keeper saw the Dauntless, a cargo ship carrying a priceless treasure, sailing over the lake. Out of Greed and wishing to claim its valuable cargo, the Lighthouse Keeper turned off the lighthouse's light on purpose, leading the Dauntless to sail against some rocks, crashing and killing the crew , all this while watching with a cruel smirk... that turns into a fearful scream when he sees a tree branch flying right at him, the impact causing him to plummet to his Karmic Death.
  • Scooby Doo Mystery Incorporated has one in the form of the Bigger Bad, the Nibiru Entity. A member of a normally benevolent inter-dimensional alien race called the Anunnaki, his own kind considers him the most evil member of their entire species. He's spent untold centuries corrupting and manipulating the people around him, especially the Team Pet of mystery solving teams, by perverting his species' ability to use animals as mediums to communicate, all working towards freeing him from his crystal coffin prison. In the process he's ruined and ended countless lives through his Unwitting Pawns (including Professor Pericles, whom the Entity turned into a murderous psychopath who was quite the monster in his own right) without a second thought. When he's finally released in the series finale, he proceeds to gleefully eat his loyal minions alive along with Mr. E. He follows this by turning Crystal Cove into a fiery Hell on Earth and devouring the entire town's population with sadistic glee, planning to move on to the rest of the universe when he's done, all for the sake of endless power. When Mystery Inc finally kill him, erasing him from time in the process, we see what Crystal Cove would've been like without his influence; a normal town with everyone living good, happy lives, showing just how much pain and misery he was truly responsible for. For this reason, the Entity is the single most evil being to have ever existed in the entire Scooby Doo franchise.
• Sym-Bionic Titan:
  • General Modula is a cold, cruel man responsible for all the misery within the series. A treacherous man who once served proudly under the Galalunan Kingdom before being mistakenly thought dead by the King, Modula lets his cruelty consume him, allying with the monstrous Mutraddi and launching an invasion on Galaluna that leads to countless innocent people killed and the rest enslaved, with Modula murdering many of the rebels himself. Intent on utterly breaking the will of the Galalunan people by killing Princess Ilana, Modula sends the Mutraddi to wreak swaths of havoc and death on Earth to kill her, even using a living bomb called Tashy 497 to potentially decimate the entire planet to get at her. He also treats his own mooks as cannon fodder, and if they fail to meet his expectations, he kills them without even moving from his spot. A man who has long abandoned any honorable traits he may have had, Modula is a walking nightmare worse than even the literal monsters he rules over.
  • The unnamed Galalunan commander from "Escape from Galaluna" is a smug, ambitious traitor who uses his front as an obstructive, obnoxious military head to ensure the death of captive hostages while pinning their deaths on Lance and leaving him to hang. In truth having allied with Modula, the traitor sells out his entire planet to the Mutraddi forces to see the royal family killed and its populace decimated and enslaved, looking over the carnage and gloating that the only reason he sold his planet out was to lead Galaluna into an age of "conquest and strength" — and the prospect of a vast reward from Modula.
• Thundercats 2011:
  • Mumm-Ra once commanded a number of races he kept enslaved using explosive collars that he placed around their necks. In his quest to rule the universe, Mumm-Ra, as we see in flashbacks, ordered the destruction of a star system in a highly-inhabited solar system, killing billions in the process simply so he could use the remains of the star to forge the Sword of Plun-Darr. Defeated and sealed inside a coffin, Mumm-Ra is freed by Grune and soon attacks Thundera with his army, killing Lion-O's father Claudus and enslaving most of the Thundercats. After taking over Thundera, Mumm-Ra proceeds to torture Jaga for information. In "Between Brothers," Mumm-Ra tries to trick Lion-O and Panthro into killing each other. In the two-part series finale, "What Lies Above," Mumm-Ra threatens to destroy the Thunderkits when they interfere with his plans, and then tries to collapse an entire city to kill his enemies. There was no line he'd not cross in his quest to become Dark Messiah of all races.
  • Grune was once a highly respected general of Thundera and a friend to King Claudus and Panthro who had ambitions to one day be king. When he learned neither he nor Panthro were promoted to General of the Army he was furious, despite being given a task to find the Book of Omens with Panthro. During their quest, Grune fell under the impression Claudus knew of his desire to rule Thundera and sent him on a pointless quest to get rid of him, turning his ambitions into bitter obsession. This led him to hearing Mumm-Ra call out to him, offering him power in exchange for his loyalty. When Panthro tried to talk him out of it, Grune attacked him and sent him plummeting to his supposed death. Returning to Thundera, seemingly with a group of lizard slaves, Grune later revealed his new allegiance and overthrew the kingdom with Mumm-Ra’s army, which resulted in the death of Claudus and having the citizens he once wanted to rule over either murdered or sold off as slaves. When reuniting with a vengeful Panthro, he shows no regret for any of the crimes he’s committed against his people, only that he's not the king yet. In his final appearance, Grune shows that even his loyalty to Mumm-Ra is a lie, as he convinced Slithe to leave Mumm-Ra trapped in the astral plane, leaving him in command of his army. His motto is “any sacrifice is worth the defeat of your enemy”, and it fits how easily Grune will stab anyone in the back to destroy his enemies and claim power.
• Scarlett from Total Drama Pahkitew Island. It was revealed that before the series had even started that she had been traumatizing her brother by making his own toys attack him for years on end simply for pulling her hair once. She then shows her complete disregard for human life when she takes control over the island and demands Chris to hand her the reward money. When he refuses to give into this extortion attempt, she attempts to blow the island up. And this is after she lured all the contestants into a room to attack them with evil robots. The kicker is that in her audition tape, she has a globe with knives embedded into it, implying what she's planning against the entire world.
• Would you believe Totally Spies had one? Helga Von Guggen is a greedy fashion designer who, to save money on materials, decides she'll start making "seamless" fur coats. How does she go about this? By kidnapping innocent people, injecting them with a serum that turns them into Petting Zoo People, then skinning them alive in what appears to be a giant industrial crusher. She later designs a line of apparel that crushes people who wear them, with heavy implications that it manages to kill an innocent shopper off-screen in the opening minutes of the very episode it was introduced. Is it any wonder that she became one of the show's main villains? Seriously, how's this for an Establishing Character Moment?

Helga: Do you like the coat? It's genuine lawyer.

• Underfist: Bun Bun is the leader of an army of demon candy from another dimension, a bloodthirsty marshmallow bunny who seeks to have his men devour humanity. Striking on Halloween night and crippling humanity to the point of going into martial law, he kidnaps Mindy and makes her ugly, blaming it on Irwin and letting her take over his army so he can manipulate her. Bun Bun’s ultimate goal is to use her powers to make his candy army stronger so they can eat humanity, starting with every trick-or-treater just for the sake of irony. When the newly formed Underfist team thwarts his army, Bun Bun attempts to boil them alive with scalding hot coco, revealing he’s had a role in ruining every one of their lives just for kicks. Even in a macabre setting like Billy and Mandy, Bun Bun manages to stand out in sheer sociopathy.
• Villainous:Black Hat is a Humanoid Abomination and the Head of the Black Hat Organization, which acts as an Arms Dealer group for villains of all varieties. He's personally killed innumerable heroes, sold weapons to Aku, Darkseid, and Mojo Jojo, and destroyed worlds for fun. While he has gone into retirement, his organization continues to plague the cosmos, providing services for other villains with the caveat that payment is either ruinous or more abstract. Even outside of these dealings, Black Hat regularly abuses his own underlings, and personally did something to the adorable 5.0.5. to keep him from speaking after he called Blackhat his dad.
• We Bare Bears The Movie : Agent Trout is on overzealous and sociopathic wildlife official who wants to imprison the bears just for the sake of doing so. Once he's captured the bears outside of Canada, he locks them in cages surrounded by electrified barbed wire fencing, along with many other bears, and then proceeds to have Ice Bear and Panda taken back to their natural habitats knowing very well he's breaking up a family. When Grizz asks Trout why he's locked them in cages, he gleefully says it's the closest he'd ever get to hunting the Bears. As the bear reserve begins to burn down, he takes advantage of the bears stacking to Officer Murphy's helicopter to save himself, making it very clear he's willing to leave the bears to die. With no redeeming qualities, Trout proves to be the absolute worst person the Bears ever met.