Bowser

Bowser is the antagonist in most Mario games. he kidnaps Princess Peach in an attempt to rule the Mushroom Kingdom. He is the leader of the Koopas and he has 8 children--Larry Koopa, Morton Jr, Wendy O. Koopa, Iggy Koopa, Roy Koopa, Lemmy Koopa, Ludwig Van Koopa, and Bowser Jr. In an unusual circumstance he helped Mario out in Super Mario RPG: the Legend of the Seven Stars.