Star Piece (Paper Mario)
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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 or Mario's Ultra Hammer 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.
Paper Mario series
In Paper Mario, Star Pieces are scattered throughout the Mushroom Kingdom, and collected by characters and used for trading too. Characters also give them to each other as thank-you gifts, usually for returning or giving an item wanted. Goombaria mentions that they are good-looking ("Look at the pretty glitter!"), which implies that characters collect them because they look good. Kolorado also mentions that when he found a Star Piece when searching Dry Dry Ruins he immediately picked it up. Mario can also collect them, but the only practical use in the game is to trade badges from Merlow. There are just enough collectible Star Pieces to buy all the badges Merlow offers. The number of Star Pieces collected so far is shown on a board in Mario's House. The in-game description is: "It's a glowing Star Piece! Wait and see what this is for."
In total, there are 160 Star Pieces collectible for Mario, among which:
Some of the overworld Star Pieces are underground. These need at least Super Boots or Ultra Hammer to get. When performing a Spin Jump, Tornado Jump, or an Ultra Hammer smash around it, a square panel from the ground flips, and the Star Piece pops out. However, if jumped or smashed right above, the panel will only shake without popping out the Piece. These Star Pieces' existence is hinted by a Boo that appears in the room where Mario gets the Super Boots. They can be detected by the I Spy Badge.
If the player hasn't collected any Star Pieces yet, the menu description says, "Wondering what this is for? Secret!"
Paper Mario: The Thousand-Year Door
In Paper Mario: The Thousand-Year Door, there are 100 Star Pieces, among which 98 are overworld and two are owned by characters. Some of overworld ones are underground and require Super Boots to get. The difference is that in the sequel, the underground panels can no longer be flipped with the Ultra Hammer. The rest two are owned by Chef Shimi and the Toad waitress, respectively, and will be given to Mario for fulfilling the corresponding requests. Mario can still use Star Pieces to trade badges. There are just enough Star Pieces to buy all the badges. Merluvlee can predict the locations of the Star Pieces for five coins, and Ms. Mowz can detect them for Mario using her field ability (by pressing ).
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