* {{Marvel Comics}} villain {{Onslaught}} had a second nasty form in the comics and in ''VideoGame/MarvelVsCapcom''.
** In the {{Crisis Crossover}} starring Onslaught itself, he took three forms. The first was armor patterned on Magneto's with {{Spikes Of Villainy}} added, completely encasing a body with the size and musculature of the Hulk. In the second form, the armor was the same, but adapted for a body that was now even larger, but more low-slung with much bigger forearms, and a bony face was visible, and balls of pure energy leaked out of his back and vents in the armor. His third form was disembodied pure energy, and he was [[ClippedWingAngel defeated just pages after taking this form]].
* There was also the ''[[Comicbook/AvengersTheInitiative Avengers: The Initiative]]'' character, Trauma, whose power was transforming into whatever his opponent was afraid of. The twist was, [[BadPowersGoodPeople he was a good guy]], and actually otherwise ''really'' [[DarkIsNotEvil nice]].
** There are many mutants in the Marvel Universe who can transform, some of them really transform into ugly, instead of cool or powerful ones. The morlock Scaleface for example was a normal woman who could transform into a giant lizard.
** There was also Freakshow from the run of Excalibur set on Genosha. He was able to transform into various monstrous forms.
* The Clown, a major enemy of {{Spawn}}, spends most of his time in the mortal realm disguised as a short, overweight circus reject. But piss him off, and he'll reveal his true form - the large, powerful demon known as the Violator - and deliver a NoHoldsBarredBeatdown upon your ass.
* In ''ComicBook/{{Amulet}}'', this happens to [[spoiler:anyone who gets "devoured" by the amulets.]] So far we've seen [[spoiler:Luger]] grow into a giant troll-like creature.
* One of the EGM ''HsuAndChan'' comics has the title duo getting roped into a wrestling match against Satan. He initially appears as a long-haired blonde in a white suit, but when the match begins, he reveals his true demonic form...a skinny, red-skinned guy with horns and pantaloons, not unlike [[Film/SantaClaus Pitch.]]
* TheSentry when he becomes the Void, especially in Siege.
* ''Franchise/{{Batman}}'' villain, Scarecrow, is definitely one of these as Scarebeast.
* ''ComicBook/{{X-Men}}'' villain Bastion has his own One Winged Angel form at the end of the recent Second Coming event. He doesn't last long once Hope Summers gets well and sufficiently pissed.
* Jean Grey's Dark Phoenix may count as well. While wings are pretty standard for Phoenix nowadays, Dark Phoenix's fiery, psychic energy wings and her tendency to eat stars when she's hungry certainly qualify her for a number of things.
* In ''ComicBook/{{Megalex}}'', evil and beautiful SapientShip personality Shalise transforms into an absolutely terrifying monstrous version of herself. Her mouth fills with fangs, her ears become bat-like, she grows in size, and worst of all, her beautiful breasts become pendulous and rotten, tipped with corroded metal blades.
* ''Series/{{Angel}}'': Illyria transforms into her true form and tries to destroy all existence.
* Set, the BigBad of the ''Atlantis Attacks'' crossover was an odd case. An EldritchAbomination who usually appeared as a colossal seven-headed serpent, he was usually hideous enough. However, when he was fought in his home dimension, he was seen in his true form, and was even more horrifying, resembling his usual form turned inside-out with a grotesque, vein-covered membrane instead of skin.
* In ''Comicbook/LockeAndKey'', Dodge uses the Crown of Shadows to raise an army of [[LivingShadow Living Shadows]] to attack the Locke children. When this fails to stop them from escaping, he absorbs all the shadows together into [[http://bloody-disgusting.com/photosizer/upload/lockekey55.jpg an enormous, monstrous amalgamation of all their different forms.]] Luckily, Tyler pulls off a heroic version using the Giant Key.