- The Bridge (MLP):
- The kaiju transported to Equestria's realms have their true form become this. Usually they are transformed into native lifeforms (i.e ponies/changelings/gryphons/etc. in Equestria, humans in the Equestria Girls realm). But after absorbing a large amount of benign magic they can return to their true form which is magnitudes more powerful and hundreds of times larger. Two cases happen one right after another with Enjin transforming followed by Monster X changing to fight it off.
- Aria Blaze gains one after copying a large amount of energy from Kaizer Ghidorah via song magic, giving her an altered Pony-Up state that makes her larger, stronger, more durable, and with Ghidorah-like powers.
- The combination of Zephyrus' poisonous manipulation and her anger over Aria's merciless beating causes Sci-Twi to become Frostbite Sparkle, a demented fusion of Midnight Sparkle and Wendigo powers and wrath.
- Charles Manson Vs The Teletubbies:
- The titular Teletubbies are humanoid beings that have felled worlds and brought suffering to those that displeased them. While initially harmless-looking, once they're angered, their powers cause explosions to occur as they vow to destroy Charles Manson.
- Charles injects himself with a Psycho Serum of unknown origin that turns him into Shin Charles Manson, a lizard-dragon-Godzilla like creature.
- Child of the Storm has Gravemoss do this by desperately giving in to the temptations of the Elder God Chthon when attacked. While creepy even before this, the reality warping tendrils that make reality scream took him into this.
- The sequel has Selene resort to being Scaled Up after Wanda inflicts a nasty combination of Impaled with Extreme Prejudice and Transflormation on her. And by 'scaled up', we mean 'transforming into a giant wingless black dragon capable of overpowering and devouring a superpowered necromantically resurrected T-Rex called Sue before fighting Magneto' (somehow, It Makes Sense in Context). She's eventually killed - or at least, put down, since Selene is notoriously difficult to kill - by being pinned down, having an improvised lance shoved through the base of her skull, then said lance being turned into an impromptu lightning conductor.
- The Red Son's techno-organic virus is meant to be this, but mercifully (considering that the Red Son is really a Brainwashed and Crazy Harry - or at least, his Blank Slate body), Magneto stops this before it really gets going.
- The Dark Phoenix, which veers straight into the Humanoid Abomination category, with Physical God power levels while it's still getting warmed up, is this.
- Reynolds a.k.a. the Void, Arc Villain for Mirror Image, transforms into this after overdosing on the power he stole from Clark and stored, in large part thanks to the fact that he was hosting a demon to handle the power to begin with. The result is a fully fledged Humanoid Abomination that can successfully fight - or perhaps more accurately, survive - Harry (now a Person of Mass Destruction with few scruples in a fight) and a teenage Superman for an extended period. However, thanks to poor tactics, Crippling Over Specialization, and the fact that his powers Cast from Stamina, it's always a question of when he goes down, not if.
- Equestria Girls: A Fairly Odd Friendship: During the Final Battle, the Dazzlings absorb all of Cosmo and Wanda's magic and merge into a giant kaiju.
- The Equestrian Wind Mage:
- The boss battle against Grey Hoof is fought after Ganondorf has given him a power boost, turning him into an alicorn called Nightmare Grave.
- During the second season's Final Battle, Demise transforms into a massive demonic beast.
- And of course, there's Vaati and Ganon's own monster forms, as seen in the games.
- When Sunset Shimmer and Starlight Glimmer reappear as part of the Church of Majora during Season 3, they've been transformed into Nightmares called Solar Flare and Starfall, respectfully.
- During the invasion of the Crystal Empire, Shining Armor gives Onox such an intense fight that the latter has to take his true draconic form to have a chance of winning.
- The alternate ending of a crossover involving Godzilla battling the God of the Bible
features God turning into a two-headed dragon that manages to kill Anguirus, sparking a primal fury inside of the monster king that ultimately becomes God's undoing when Godzilla becomes "Ultra Godzilla". - Guardians, Wizards, and Kung-Fu Fighters:
- Tarakudo can temporarily shift from an Oracular Head back to a full body, during which he's basically a Physical God.
- Downplayed with Daolon Wong, who can enter a transformed state by making his Dark Chi Warriors reenter his staff after some time, which makes his skin turn the same color as theirs, makes one of his eyes go pitch black and the other completely white, and gives him more magic power, which allows him to use very devastating spells originally created by the Demon Sorcerers. However, this form only increases his magical might, not the physical, and its main purpose is to allow him to use the demonic spells without tiring himself to death. Also, it has a downside, since he can only last in this state for as long as his Dark Chi Warriors had been materialized.
- The Last Daughter: When gang boss Lung fought Taylor, he transformed into a dragon. As the battle went on, he kept evolving, becoming bigger, stronger, more powerful, growing more sets of wings... but since he was fighting a Kryptonian, his strategy didn't work.Lung roared, his flames intensifying as he rose to his feet with alarming speed. I could see even more scales appearing under his skin and bursting through to provide ample protection as he ramped up to better match my strength. In a matter of seconds he had grown to eighteen feet in height, and a pair of wings were slowly beginning to protrude from his back.
- The Night Unfurls: Shamuhaza is not the Big Bad, but he still transforms into a great scuttling insect-like Eldritch Abomination offstage, awaiting Kyril on a lake for one climactic battle. To the Good Hunter, however, his opponent is nothing more than a giant beast, one amongst the many that he had slain in Yharnam. With a wry smile, the Hunter comments that he doesn't know what he is anymore, before telling Sanakan and Hugh to kill it.
- Anti-Hero example in Thousand Shinji. When she fought the MP-Evas, Asuka and her Unit-02, went berserker and she forced her mecha to turn into a Bloodthirster demon:Some outside force seized Unit 02, lifting it high into the air, its limbs held out taut. The air began to swim with unholy sounds, almost as if the wind had a forked tongue and was chanting in some blasphemous language. Something unpleasant was going on beneath the armour of Unit 02, waterfalls of blood leaking forth from its wounds, turning the ground bellow and the nearby lake vermillion.
With a scream brought forth from the very universe itself, the back of Unit 02’s armour exploded outward in a shower of broken metal and ceramics and a flood of brilliant crimson blood. A pair of colossal bat wings unfurled, flicking blood off their surface as they extended, before making a powerful downward stroke that launched Unit 02 into flight, seemingly ignoring the winds generated by the storm still raging above.
Reaching a hand out into nothingness, Asuka grabbed onto something with each hand and began to pull out. Twin ragged streaks appeared in the sky, blood raining from holes in reality as Unit 02 extracted its new weapons. In the right hand it held a titanic bronze battle axe dripping with blood on its adamantine blade, while in the left it bore a long, snaking whip covered in barbs. - In Toonatopia: The Animation Initiation, SpongeBob turns into the monstrous XtremeBob after eating the pie dunked in X-Acid.
- Digimon Adventure 02: The Story We Never Told:
- Dagomon decides to merge with the final Control Spire during his showdown with the Digidestined in order to gain the power to claim his ultimate prize.
- Oikawa fuses both Blackwargreymon and Myotismon's data with a copy of himself to change it into some kind of kaiju Digimon that appears to be based on Malomyotismon.
- In the Godzilla Fan Film Godzilla vs the Kaiju Killer, Stalkkus transforms into a dragonlike monster in order to fight Godzilla, who's been freed in order to kill him.
- The New Adventures of Invader Zim: During the climax of Season 1, after having a Villainous Breakdown, Norlock transforms into a demonic humanoid bat monster, which is clearly vastly more powerful than his usual form.
- Shadows Awakening: During the Final Battle, the Queen absorbs most of her Shadowkhan army, transforming into an adult demon form she calls the Empress of the Shadowkhan.
- Queen of All Oni: Jade at one point tries to make one of these for her astral projection, being a more armored and combat capable form of her usual naga appearance. Becomes a Clipped-Wing Angel instead, as its one appearance sees her easily defeated by Lung's dragon familiar.
- The Final Battle of The Lion King Adventures sees the Greater-Scope Villain, the Writer, taking on a chimeric form containing traits from every other villain in the series in order to kill Simba for good.
My Little Pony: Friendship Is Magic
- The Pony POV Series:
- Loneliness, the first Arc Villain and a shapeshifter, finally gets fed up with Twilight attempts to rescue Trixie from her and transforms into a Draconequus to try and kill her.
- The second Arc Villain, Princess Gaia does this when Applejack shatters her illusion and reveals her true form: the monstrous Nightmare Whisper.
- Chrysalis' Origin Story sees Queen Cocoon do this during their battle thanks to genetic alterations done by Professor Kabuto.
- Both Professor Kabuto and General Hercules do this during battles with them with Kabuto turning into a living bioweapon while Hercules assumes a larger, Nigh-Invulnerable armored form.
- General-Admiral Makarov does this during his Final Battle with Shining Armor, assuming his true form (an Eldritch Abomination composed of the shadows of those whose existences he's consumed) to attempt to devour Shining whole. Right before he death, he attempts to turn into Father Deer, but the Blank Wolf makes quick work of him before he can finish.
- The Dark World Arc sees Fluttercruel do this after her father Discord gives her a portion of his own essence and the power Discord stole from Havoc, causing her to transform into a full Draconequus.
- Lord Tirek's current form is actually this for him, as he was a normal centaur before devouring the entirety of the Pandora's Box of dark magic Morning Star cast to Earth, mutating him into the much more monstrous, near god-like form he's known as.
- In 'How Trixie (Somehow) Saved Hearth's Warming, Leidr, a sapient Windigo, does this by fusing with his two nonsapient herdmates to become a gigantic version of himself.
- During the Final Battle of Getting Back on Your Hooves, Checker Monarch does this twice due to them being in the dream world and her being capable of Lucid Dreaming. The first one is transforming into an Ursa Major to go after Trixie, exploiting the fact Trixie is terrified of Ursas to prevent her own lucid dreaming abilities from working due to her fear. The second one is when the rest of her mind fighting the Mane Six becomes an Alicorn. However, that one doesn't work very well, as the Mane Six simply blast her with the Elements due to having lucid dreaming from Trixie and having overcome her more psychological assaults.
- Each of the titular gods in The God Squad can do this. Luna has Nightmare Moon, Celestia becomes Corona Hellstar, Tydal becomes Darkwater Abyss, and Cadance turns into Mi Lujuria. They must be HIGHLY focused or these forms become their One Winged Angel forms.
- During the Equstria Boys 2 arc Tydal does lose control and his form becomes a One Winged Angel, with his become a Outer Gods-like form with lightning wings, writhing tentacles, and demonic horns
- A Diplomatic Visit: In chapter 11 of the third story, Diplomacy Through Schooling, Tirek goes One-Winged Angel via his Mana Drain abilities as he did in canon, going from a weak, frail form to a muscular kaiju-sized monster with a beard and long horns. He meets his match in the form of Twilight Sparkle, who also goes One-Winged Angel when overcome with rage and with her power fully unrestrained, assuming the form of the Lady of Magic, who has six wings, eight legs, a dozen eyes… and access to every type of magic possible, allowing her to effortlessly curb-stomp him. It's later explained that Twilight's altered form more closely resembled Chaos, the Creator from whom the Power of Magic was born.
- Discord's New Business: Both Rarity and Ember. Rarity grows to a large size because of Greedgrowth Insanity. Ember is temporarily aged up into an adult dragon to fight her.
- Neon Genesis Evangelion: Genocide: Played straight and discussed in chapter 10 when the nineteenth Angel — a weird, floating blob — transforms into a black sphere, and Ritsuko suggests that isn't its final form.
- In The Butcher Bird: Kaneki possesses one in the form of a kakuja form. Initially, it's incomplete, and therefore a Dangerous Forbidden Technique, but a bit of Die or Fly from Vinci spurs him to complete it by accepting his Enemy Within, resulting in the complete form: NIDHOGGR.
- In This Bites!, Moria transforms into one like in canon, this time with the help of his Awakened Devil fruit. He has his Living Shadow devour the shadows of several inanimate objects, increasing his size and attempting to turn himself into a dragon called Nidhogg, though the result left the Strawhats nauseous looking at him. The fight between him and Nightmare Luffy nearly breaks Thriller Bark into two.
- Persona: The Sougawa Files: The true main antagonist does this twice. When battling against Rina in her mind, Yuudai transforms into a grotesque, half-human half-insect hybrid. He uses this form again in the final battle with him, but one-ups himself by transforming into a massive, tentacled hive covered with the masks of his victims - and eight masks meant for the Freedom Fighters. This form is known as the Father Shadow.
- Pokémon Master: When Lance fought Ash, he grew wings."I don't think so." Lance stepped backward, his eyes now gleaming. "I'll admit you are better than me on the ground ..." His cloak began rustling behind him when all at once, two large, leathery dragon wings were expelled out from his back simultaneously. They flapped once, powerfully, sending wind and rain flying into Ash's face. "But can you defeat me where I am strongest, Assassin? In the air?" With that, his wings flapped again, and continued flapping until he was airborne, eight feet into the air and still rising.
- Swear Not By The Moon: When Zahn Tiri is exposed for her crimes she gets so angry that she transforms into her demon form and plans to burn everything to the ground out of vengeance.
- During Isha's battle with the Chaos Androids in Everqueen, Slaanesh takes enough attention in the battle to empower the last one personally. Still not enough to defeat her, of course - him calling Isha mother does, however, prove to be a Berserk Button.
- Better Bones AU: Ashfur absorbs several StarClan cats in the final battle against him to turn into a larger, stronger form that can't be killed by normal means.
