Paper Mario: The Thousand Year Door is a game in the Super Mario series. It is for the GameCube. It is the sequel of Paper Mario, and the prequel to Super Paper Mario, Paper Mario: Sticker Star, Mario and Luigi: Paper Jam and Paper Mario: Color Splash.
The game begins with Princess Peach going to Rougeport and buys a treasure map. She sends Mario a letter asking if he wants to find the treasure with her, but she gets captured by Sir Grodus. When Mario goes to Rougeport, he finds Lord Crump interrogating Goombella. He intervenes and saves her. She tells him he needs the seven Crystal Stars to get the treasure and save Princess Peach.
Paper Mario: The Thousand Year Door is an RPG and platformer. Mario has several paper-based abilities. He can turn into a paper plane, become super thin, roll into a ball, and become a paper boat. The playable characters are Mario, Princess Peach, Bowser, Goombella, Koops, Madame Flurrie, Yoshi, Vivian, Admiral Bobbery, and Ms. Mowz. The RPG battles take place on a stage. The scenery of the stage can damage Mario and Co. and enemies. The audience can also help Mario and Co. or harm them.