Super Paper Mario is a game in the Super Mario series, and is for the Wii. It is the third Paper Mario game, after Paper Mario and Paper Mario: The Thousand Year Door; and before Paper Mario: Sticker Star, Mario and Luigi: Paper Jam, and Paper Mario: Color Splash. It is one of the spiritual successors to Super Mario RPG: Legend of the Seven Stars.
In Super Paper Mario, Mario and Luigi decide to visit Princess Peach. Suddenly, Toad tells them that she has gotten kidnapped by Bowser. They go to his castle and find him planning to kidnap her. Then, Count Bleck appears with Princess Peach in a cage. Mario attacks him, but he fails, allowing Count Bleck to capture Bowser, Luigi, Peach, and Bowser's minions with a black-hole-like void. Luigi, Bowser, Peach, and Bowser's minions end up in a strange room. Count Bleck's minion, Nastasia, hypnotizes Princess Peach and forces her to marry Bowser to strengthen the Chaos Heart. Luigi tries to stop Count Bleck and Nastasia by jumping on the Chaos Heart, but ends up making it stronger. Meanwhile, Mario does not get captured in the void. Tippi, a butterfly-shaped member of a species called "Pixls", brings him to the town of Flipside. Flipside's leader, Merlon, explains to Mario that the void that Count Bleck created needs to be destroyed with the eight Pure Hearts before all the worlds are consumed. Mario agrees to help him.
Super Paper Mario has eight worlds with four levels each. The worlds are Lineland, Gloam Valley, The Bitlands, Outer Space, Land of the Cragnons, Sammer's Kingdom, The Underwhere, and Castle Bleck. It is an action RPG/platformer. It has standard platforming levels with challenging puzzles, but also has some RPG elements, like leveling up.
Super Paper Mario's main heroes, or the Heroes of Light, are Mario, Luigi, Princess Peach, Tippi, and Bowser. The main villains are Count Bleck, Nastasia, M. L, Mimi, and O'Chunks. There are also several unique bosses and NPCs.