Paper Mario: The Thousand Year Door is a game for the GameCube. It is the second Paper Mario game. Its sequels are Super Paper Mario and Paper Mario: Sticker Star. In it, Mario has to find the seven Crystal Stars to open the Thousand Year Door. Also, Peach gets kidnapped, and Mario has to save her from the X-Nauts. After each chapter, there are levels where they player plays as Bowser and Peach. It is an RPG, and has a lot more plot than most Mario games.