{{MarqFJA}}: How does "[a] cross between UnstoppableRage and SplitPersonality" lead to Superpowered '''Evil''' Side? TheIncredibleHulk and {{InuYasha}} are prime examples of [[DarkIsNotEvil overwhelming rage not automatically equating evil]], though the former [[EnemyWithin does have a rarely-seen personality that accurately fits this trope's current name to a T]]; several other examples listed also do not fit the "Evil" part of the trope title. Therefore, I propose that it be modified slightly to a more inclusive form.

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ChromeNewfie: I argue that this is a trope in more general use than just anime. Recent example includes Niki\Jennifer in [[{{Series.Heroes}} Heroes]]. Others include the Banner-Hulk dichotomy, certain versions of Aurora from Alpha Flight, some of the versions of Jekyll and Hyde, and of course Willow in BuffyTheVampireSlayer, who got powerful when addicted to magic, and INSANELY powerful when she flipped out from grief and went Dark Willow.

{{Seth}}: I agree, we should give it a tropes or characters as devices mark up as well and add the other examples.

{{Tanto}}: This seems like the same as DeadlyUpgrade to me.

{{Seth}}: Nah this one focuses on a separate, more powerful personality within you - how much this overlaps with Dr Jekyll Mr Hyde (Which i know we have somewhere) up for debate though. DeadlyUpgrade is sacrificing something big for power, nothing to do with another personality (though there will be some overlap).

MorganWick: JekyllAndHyde, by the way.

{{HeartBurn Kid}}: Changed the Hulk entry, as Freud defined the id as the base, primitive instincts which the Hulk embodies, not the ego. The ego is the sense of self, and the superego is the conscience. (Short version, and I majored in CIS, not Psychology, but that's the impression I have anyway)

Roland: Correct me if I'm wrong, but the Sandwraith in Warrior Within doesn't seem a good example of this trope. It's just the result of a magical artifact; nothing -evil- about it. The Corrupt state, though, is definitely a good example.

UnregisteredUser If I recall correctly, near the end of Dr. Jekyll and
Mr. Hyde it is implied that Hyde has been getting larger, since Jekyll
giving into Hyde's whims makes Jekyll more even, and therefore makes
Hyde larger. I don't want to change the entry unless someone else can
confirm this, though. Anyone?

I may be wrong about this, but Kazuma from Kaze no Stigma actually gets weaker when in AT ANY COST mode, its just that he'll do stuff he normally wouldn't. At least, in the anime.
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{{Servbot}}: Removed...

* In Fushigi Yuugi the protagonist Tamahome commonly taps into his "Ogre Mark," usually after the villain threatens his family or his girlfriend.

... because last I checked, tapping into the Ogre mark just makes him better at martial arts. There's no personality change at all.

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{{Andyroid}}: Removed the Wario and Yoshi examples from the entry on ''SuperSmashBros Brawl'', because they're not really {{Superpowered Evil Side}}s.
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BigT: I removed natter about InuYasha. Someone actually struck the example because they didn't agree. Kinda leaves out the idea that the person wanted to present both sides of the story. Still, I preserved as much as I could.