Star Pieces are collectible items in the Paper Mario series. They are found in hidden locations throughout the games, and some are even found underground, in which case a Spin Jump is used to collect them. Star Pieces can be used to trade for various badges. There are 160 in Paper Mario and 100 in Paper Mario: The Thousand-Year Door. In Paper Mario, they are used for trading with Merlow for badges. 64 of the 160 pieces in this game are held by Chuck Quizmo. In Paper Mario: The Thousand-Year Door, they are used for trading with Dazzle in Rogueport Sewers. The fortune teller Merluvlee can tell Mario where the star pieces are.
Star Pieces make a cameo appearance in the mini-game Frozen Frenzy in Mario Party 5. The player who collects the most wins the mini-game.