From the Super Mario Wiki
The Bullet Candy is a blue Candy in Mario Party 8. This item has a picture of a Bullet Bill on the wrapper, and when characters use it, their torso becomes the back part of a rocket, somewhat like Bullet Bill, and allows them to hit three Dice Blocks. This makes them a "Bullet" Character, and as they move along the board, they steal one Star form any opponents they run into. This candy is only hidden in Bowser's Warped Orbit, and is worth 15 or 20 coins, if bought at the store but can sometimes cost only 10 coins.
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