{{Eldritch Abomination}}s in WesternAnimation.

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* ''WesternAnimation/SouthPark'' has the Wall-Mart store chain, which exists [[AsLongAsThereIsEvil As Long As There Is Consumerism]].
** In "Coon 2: Hindsight" and "Mysterion Rises", DP (formerly BP) drill into another dimension and release Cthulhu.
** Cartman becomes one in "Trapper Keeper" when he is assimilated.
* {{Retcon}}s to the ''Franchise/{{Transformers}}'' backstory turned the [[PlanetEater planet-eating]] Unicron into an Eldritch Abomination, not only giving him the power to move between dimensions and universes, but also insinuating that a piece of his dark soul inhabits all of the Transformers since the beginning, meaning that any one of them could turn into a servant to his apocalyptic hunger. Just listen to [[http://www.youtube.com/watch?v=SNtYjTLcmDQ his theme song]].
** It was also revealed that he does ''not'' [[PlanetEater eat planets]] for sustenance - he gets ''that'' from [[AsLongAsThereIsEvil hatred and strife]]. No, he eats planets because he's offended by existence. All of it. So he's trying to eat it. All of it. Every dimension. He's already devoured approximately 20% of all known existence in the {{multiverse}} and is eager to continue his binge. He even apparently [[ApocalypseHow once destroyed reality itself]], and the only reason that anything exists at all is because he missed a couple of fragments and fell asleep, allowing them to rebuild.
** In ''WesternAnimation/TransformersPrime'', [[spoiler:Dark Energon]] is revealed to be Unicron's blood. This is a substance that makes anyone that uses it hear Unicron's thoughts, gives them a serious power boost, almost kills a human ([[spoiler:Raf]], to be exact), and, above anything else, resurrects dead Transformers as mindless berserkers. If his blood can do that...
*** And as of "One Shall Rise", it's got worse. [[spoiler:The earth ''formed around him''.]] And he can [[MookMaker make copies of himself in the rock, and keep making them until you're dead]]. (They're smaller than the original, thankfully, but still huge.)
*** Dark Energon isn't the only version of Unicron's blood that did horrifying things; Angolmois is liquid chaos, causing completely random and often puzzling effects. In the comics, it made someone into a Herald without them even realizing it, mutating them into monsters that frothed green and granting extreme amounts of power.
** The Swarm in ''Transformers: Generation 2'' was born from a long-lost ritual of Transformer reproduction that their god Primus never intended them to retain, and is obsessed with destroying all mechanical life in the known universe.
* In a two part ''WesternAnimation/JusticeLeague'' episode "The Terror Beyond", Comicbook/{{Superman}} and Co. go fight [[LawyerFriendlyCameo Ichthultu]]. A giant alien monstrosity not bound by time or space going up against a group of superheroes in a work that sits firmly on the Idealistic side of the SlidingScaleOfIdealismVersusCynicism? The [[DidYouJustPunchOutCthulhu beatdown]] was the source of much awesomeness.
* One of these in ''{{WesternAnimation/Futurama}}'' [[spoiler:[[DidYouJustRomanceCthulhu attempts to date and have sex]] with the entire universe]] in the second movie.
* ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'': The Nergals, especially Junior. In addition to [[VoluntaryShapeshifting shapeshifting]], he can walk through walls, freeze people in stasis, and spawn bat-like imps from his own body. His true form is so hideous that they didn't even show it onscreen until it (ostensibly) appeared in "The Greatest Love Story Ever Told Ever".
* The prime antagonist of ''WesternAnimation/ShadowRaiders'' is the Beast Planet, a PlanetEater the size of a gas giant that [[ImplacableMan never stops, tires, or negotiates]], [[WeHaveReserves produces an unlimited supply]] of scary-looking {{Mooks}}, and '''is completely NighInvulnerable'''. They only defeat it by [[spoiler:teleporting it away, and it then just starts eating other planets and may well have absorbed the teleporter technology...]]
* ''WesternAnimation/SupermanTheAnimatedSeries'' had as a one-time threat a HiveMind alien blob thing that called itself "Unity". Using a creepy preacher as its primary avatar, it turned [[spoiler:Smallville]] into a TownWithADarkSecret and nearly absorbed all the townsfolk into itself.
* ''WesternAnimation/SuperRobotMonkeyTeamHyperforceGo'' has several of them, like a flying, multiple-eyed thing that turned anybody who looked at it into bloodthirsty zombies, among many others. And Skeleton King's [[spoiler:master]] was a fricking big earthworm-like thing that was much larger than anything else our heroes ever meet. And It was only a part of its original body, God knows how big.
** The eye monster was [[spoiler:Skeleton King's eyeball. Wow... If each body part of his is an Eldritch Abomination, then what does that make him?]]
** Also, an episode late in the final season has a flying minotaur-like thing with the ability to open a portal to a ''dimension'' filled with fellow Abominations. And during the finale, the team actually travels to that dimension in pursuit of [[TheDragon Mandarin]], [[DarkMagicalGirl Valeena]], and [[spoiler: [[FaceHeelTurn Evil!Sparx]]]], thus exposing the audience to even more Nightmare Fuel.
* In its planning stages, ''Disney/TheEmperorsNewGroove'' originally had VainSorceress Yzma summon a force of darkness, called Supai, to [[TheNightThatNeverEnds blot out the sun and plunge the entire world into eternal night]].
* Lucubra, the main antagonist of the ''WesternAnimation/Ben10UltimateAlien'' episode "The Creature From Beyond" [[spoiler:and one of the breed of monstrous minions to the BigBad of the season, Diagon]]. This extra-dimensional horror boasts SuperStrength, NighInvulnerability, FrickinLaserBeams, and the power to devour a person's thoughts with MindControl as a bonus.
** Vilgax's OneWingedAngel form gets [[GodGuise mistaken for Diagon]] by a cult. While they believe Dagon to be an alien, their cult-like mentality and beliefs are more like worship. Rather, if this is meant to be a shout-out to the actual pagan god or the Great Old One is unknown, but how they treat him has an EldritchAbomination feel.
** The ''real'' Diagon. It's held behind the same seal as Lucubra, but is ''much'' worse (Gwen says compared to Diagon, Lucubra is an ''insect!''). In the next episode, they're actually shown the Diagon, and while the audience doesn't see it ([[TrailersAlwaysSpoil though commercials very clearly show him]]), Gwen and Kevin react to seeing him as if they were ''in pain''. [[http://ben10.wikia.com/wiki/Diagon Just take a look.]] He comes from another dimension, is referred to as an 'Old One' by Charmcaster, and has enough power to match and defeat a powered up Way Big (one of Ben's most powerful aliens, if not THE most powerful).
* ''WesternAnimation/AdventureTime'':
** Hunson Abadeer, an unkillable, hideous monstrosity who rules [[EldritchLocation the Nightosphere]] in a perpetual state of chaos and pain, has a OneWingedAngel form Lovecraft would have been proud of, and whose first order of business when he managed to escape was to [[YourSoulIsMine suck up the souls]] of everyone in Ooo. How Marceline ever managed to become a ChaoticNeutral CuteMonsterGirl with ''that'' as a parent is a riddle for the ages.
*** Abadeer's amulet, made of "pure chaotic evil", turns the wearer into an Eldritch Abomination within ''seconds''. This happens to both [[spoiler:Marceline and Finn]].
** Prismo is a being of unlimited power who lives outside of time and space at the centre of TheMultiverse, casually creates (and ''destroys'') entire {{Alternate Universe}}s, and doesn't even have a physical form so much as he's a projection of the Time Room. Fortunately, [[DidWeJustHaveTeaWithCthulhu he's a pretty friendly guy]].
* The demon that [[BigBad Mok]] wants to summon in the movie ''RockAndRule'' is definitely in line with this trope, with its lack of a fully defined, stable form, immense power, and its actions being more akin to an all-consuming supernatural force of destruction than those of a recognizably sentient being.
* ''TheTrapDoor'' is full of these things (including the main character's employer). Some of them really quite nightmarish. [[WhatDoYouMeanItsForKids It's an 80's British claymation kids' show.]]
* An [[EasterEgg easter egg]] in the ''WesternAnimation/GravityFalls'' episode "Irrational Treasure" lists on the top-secret Northwest Cover-Up document that there is an enormous, evil, time-devouring baby from another dimension [[SealedEvilInACan that is frozen in an Antarctic glacier]]. "The Time Traveler's Pig" reveals that the "Time Baby," as its mortal supplicants dub it, is eventually released and conquers the world... or at least establishes the TimePolice.
* While most of the monsters in the ''Franchise/ScoobyDoo'' franchise are [[ScoobyDooHoax fake]], the occasional real one shows up. The BiggerBad of ''WesternAnimation/ScoobyDooMysteryIncorporated'' is an evil annunaki, which are extra dimensional beings that usually communicate by possessing animals. The unnamed entity spends most of the series [[SealedEvilInACan sealed in a coffin]], but still manipulates the creation of mystery solving groups and either attracts or creates the various crooks in costumes, as well as [[TheCorruption stealing and imprisoning the best parts]] of people that live in Crystal Cove. When released, it [[HellOnEarth unleashes hell and animal headed minions on the town]] and [[ToServeMan starts eating the residents,]] swearing to [[OmnicidalManiac eat entire galaxies and eventually the universe]]. Yes, the offspring of Satan and Cthulhu made an appearance on a Scooby-Doo show.
* In the backstory of ''WesternAnimation/SamuraiJack'', the gods hunted and defeated an Eldritch Abomination, but missed a single fragment. That fragment fell to Earth and eventually became [[BigBad Aku]].
* '''[[RaggedyAnnAndAndyAMusicalAdventure The Greedy]] is a shapeshifting mass of sentient taffy lacking the ability to stay in a shape for longer than a few seconds, while eating candy that it constantly regurgitates.
* Chernabog from [[Disney/{{Fantasia}} Fantasia]] is an obviously {{Satan}}eque being who is shrouded in darkness and having entire mountain as his lower torso. He is able to raise the dead, manipulate flames and change things into twisted parodies of life.
* Short-lived (only 13 episodes long) 80's {{Hasbro}} series ''{{WesternAnimation/Inhumanoids}}'' revolved around the heroic "Earth Corps" fighting against ancient, {{kaiju}}-like horrors from the center of the Earth. The three main antagonists were Metlar (giant mineral-based demon who throws globs of molten rock/iron at his foes), D'Compose (rotting zombie dinosaur who could revive the dead and turn the living into decaying zombie slaves with a touch) and Tendril (Cthulhu-like [[WhenTreesAttack plant-monster]]). Others appeared in several episodes, like Gagoyle and Ssslither, whilst recurring foe Nightcrawler was a HumanoidAbomination created by D'Compose from the corpse of a human enemy.
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