...a not-so-well-intentioned extremist: tvtropes.org/pmwiki/pmwiki.php…
"Clank: There must be another way to make a home for your people!
Chairman Drek: You think that's what this is about? Who do you think polluted our last world? I did! This is about one thing and one thing only: cash, and lots of it. See, I've been paid for every square inch of my new world. Once the new inhabitants move in, I'll begin polluting this world as well, and the whole thing starts all over again. Ah... brilliant.
— Ratchet & Clank (2002)"
"Kingdom Hearts: Master Xehanort once believed that the universe was too full of light and believed a balance between light and darkness was the way for a perfect world to exist. His solution — begin a Keyblade War to engulf the worlds in darkness, and when he wins and claims the power of Kingdom Hearts, he can remake it in his image of balance. However, he's since become Drunk on the Dark Side, and his only goal these days is power and knowledge for the sake of having them. Dream Drop Distance sums it up best: When he's finally called out on his actions against Terra, Aqua, Ven, etc., does he make an I Did What I Had to Do speech about them? No, he just casually invokes But for Me, It Was Tuesday and claims Because Destiny Says So as a justification for ruining their lives."
"The Legend of Zelda:
•In The Legend of Zelda: Twilight Princess, Zant claims he wanted to conquer Hyrule to help the Twili, when it was clear to all he was just a power-hungry lunatic.
•In The Legend of Zelda: A Link Between Worlds, Yuga helped Princess Hilda reassemble the Triforce, but he didn't care about saving his world from destruction, only to recreate it in his image."
"Rosario + Vampire: Fairy Tale repeatedly claim that they want to make a world for monster equality and that Humans Are the Real Monsters, but it's clear from their willingness to oppress and kill their fellow monsters that they only want equality and power for themselves.
•Kuyou constantly goes on about how everything he does is for the sake of justice and that Humans Are the Real Monsters, but it falls flat considering that he abused his authority as the head of the Security Committee to make everyone else at Yokai Academy miserable, and the fact that he barely needs any provocation to burn someone alive, human or monster."
"Digimon Savers: Akihiro Kurata lies about Digimon being threats to humans to justify him wanting to wipe them out."
From Fire Emblem Echoes:
"Desaix killed the King because he certainly thought he could be a better King for Zofia and guide the nation to a better state, considering Lima IV to be a hedonistic and poor ruler spoiled with the blessings of Mila, and considering Mila herself to no longer be worthy of being worshiped as she had grown slothful and uncaring (he even refers to her as a "monster"). However, he comes off as just being a power-hungry and murderous man driven by personal ambition rather than the good of Zofia despite the situation, not exactly doing a better job at 'being King' than Lima IV was."
In Full Metal Alchemist(Brotherhood and Manga), Shou Tucker and his family were in danger of being in poverty, his solution was to turn first his wife and then his dog and daughter into pained chimeras, just for the sake of him being an alchemist, a job he's no good at.
Mephiles sent Silver to the past, not to help him(Silver) stop Iblis from destroying the world but use him(Silver) to break Iblis's seal so that they(Meph and Ib) can reform into Solaris and consume all the time in existence.