'''Basic Trope''': A BigBad assumes a monstrous form for combat.
* '''Straight''': The human [[BigBad Emperor Evulz]] sprouts horns and demonic wings.
* '''Exaggerated''': Evulz escalates from one form to the next again and again and again, eventually becoming larger than the Earth and [[EldritchAbomination uglier than a Lovecraftian bowel movement]].
* '''Downplayed''':
** [[HulkingOut Evulz grows somewhat taller and more muscular, and his face distorts a bit]].
** [[SuperMode Evulz skin color and/or costume changes, but his frame remains the same]].
** TurnsRed
* '''Justified''':
** [[AFormYouAreComfortableWith The human appearance was just a disguise]], and it would only get in the way during a fight.
** [[VoluntaryShapeshifting Evulz can shapeshift]], and has a form that's better at combat than his current form. [[CombatPragmatist Why not use it]]?
** Evulz has a dangerous PsychoSerum that is only to be used in an absolute emergency. [[LastVillainStand This is an absolute emergency.]]
* '''Inverted''':
** The already-monstrous Evulz crosses the BishonenLine.
** Or [[TheHero Hiro]] transforms into a OneWingedAngel form and proceeds to [[RuleOfCool epically]] [[CurbStompBattle defeat]] Evulz.
** Evulz is ALREADY huge and shrinks halfway through the final battle, becoming faster and deadlier after the transformation.
** Evulz is an EldritchAbomination, but in the final confrontation he gains an advantage by [[BecomeARealBoy Becoming a Real Boy]], because HumansAreSpecial.
* '''Subverted''':
** ClippedWingAngel.
** Evulz' human form IS his [[BishonenLine most powerful form:]] anything else is a downgrade in power.
* '''Double Subverted''':
** The ClippedWingAngel was just the first stage of the transformation. The second stage means business!
** "Besides, dragons are so much [[RuleOfCool cooler]]."
** It turns out the transformation is in part psychological; while MonstrosityEqualsWeakness, the monstrous form is TooDumbToFool by virtue of sociopathy and [[NoNonsenseVillain does not trip over it's own arrogance]] like Evulz does in his normal form.
* '''Parodied''':
** The OneWingedAngel form looks utterly ridiculous. Even the heroes double over in laughter.
** The BigBad [[NotHyperbole literally transforms into]] [[WingedHumanoid a one-winged angel]].
** The BigBad doesn't transform at all, he [[WesternAnimation/SouthPark just changes his hat and/or fake mustache]] and claims that is his "''ultimate form''".
* '''Zig Zagged''': Evulz reveals his new form. It's a cute little rabbit. [[KillerRabbit The rabbit reveals sharp claws and fangs and starts to tear the party apart]]. So [[TheHero Hiro]] transforms into an angelic knight and proceeds to fight it. However after being beaten, Evulz transforms into an EldritchAbomination. Hiro calls upon the power of the {{Cosmic Keystone}}s and [[HorrifyingHero ALSO]] transforms into an EldritchAbomination, and is able to match Evulz in strength. So Evulz [[OhCrap transforms into...]]
* '''Averted''': Emperor Evulz kicks plenty of ass as a human.
* '''Enforced''': "What says ThisIsTheFinalBattle better than our villain turning into a twenty-foot tall demon?"
* '''Lampshaded''': "Puny do-gooders, '''BEHOLD MY TRUE FORM!!!'''"
* '''Invoked''': Evulz knows he needs more power and downs the mutagen sample.
* '''Exploited''': Alice [[IShallTauntYou enrages]] Evulz into using this form in an environment that cannot support it, and manages to get Evulz to collapse his own throne room on himself.
* '''Defied''':
** Evulz sneers at anyone who feels the need to alter his body to kick ass.
** "[[EvilOverlordList I will not turn into a snake. It never helps.]]"
* '''Discussed''': "Don't let your guard down. When the going gets tough, fellows like these tend to turn into devils and sprout wings."
* '''Conversed''': "Have you noticed how often [[BigBad villains]] have scary alternate forms?"
* '''Deconstructed''': Evulz downs the mutagen sample, sprouts CombatTentacles, and shortly thereafter dies of organ failure from having his biology so abruptly rearranged.
* '''Reconstructed''':
** ...Then rises up again as an unstoppable monstrosity, the mutagen having completed its work.
** ...Then he reveals that the physical mutations were just a side effect of changing his physiology so that he could [[BrainUploading transfer his mind into]] [[GeniusLoci his castle]].
** [[ThanatosGambit He killed himself on purpose to]] [[HellHasNewManagement go to hell and subsequently take it over]] to gain even MORE power than what the mutagen sample would've given him had he survived.
* '''Played For Laughs''': Emperor Evulz assumes his true form: a [[RidiculouslyCuteCritter hamster with fairy wings.]] [[KillerRabbit That shoots]] [[ShockAndAwe lightning]].
* '''Played For Drama''': Emperor Evulz's willingness to sacrifice his humanity for power is portrayed with appropriate gravitas.
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%% Optional items, added after Conversed, at your discretion:
%%* '''Implied''': ???
%%* '''Plotted A Good Waste''': ???