Dimentio

Dimentio is a villain in Super Paper Mario. His name is a pun on dementia and dimension. Like Mario and Mimi, he can flip between dimensions, but he can also manipulate them (an ability he shares with Merloo) and controls Dimension D, which he designed. Skilled in duplication, teleportation, and invisibility, Dimentio is one of the four main minions of Count Bleck, along with O'Chunks, Mimi, and Nastasia. However, over the course of the game, Dimentio rapidly reveals himself to be the true main antagonist, using his 'master' merely as a way to further his plans to obtain the Chaos Heart and use its power for his own agenda.

Trivai

 * Despite Bowser being the big bad of Pooh's Adventures, Dimentio is far more sinister and evil and can be considered the "devil" of Pooh's Adventures.