Billiard Ball

The Billiard Ball (known as the Pool Ball in the British English version) is a Thing in Paper Mario: Sticker Star. It is found in the fittingly named Strike Lake. Mario must locate the tree to the right of the secret exit to the bonus Comet Piece, which he must hammer a few times to drop the ball, allowing him to collect it. It remains in Mario's Album until it is turned into a sticker at a Sling-a-Thing station. Once it has been used as a sticker, it returns to its original position. It can also be purchased from the Shady Toad for 50 coins and sold as a sticker for 20 coins.

As a sticker, the Billiard Ball takes up only one square in Mario's Album. If and when it is used in battle, the battlefield darkens as Mario forms a bowling stance. After he thrusts his arm out, the Billiard Ball quickly rolls into any onscreen enemies, possibly defeating them. The player may press as Mario finishes his pose to increase the damage dealt. A banner reading "NICE SHOT!" appears after the Billiard Ball is used, regardless of how much damage is dealt.

The Billiard Ball can also be placed into the Sticker Museum as #29, alongside the other ball-based Things. Its basic description states it functions as any other pool ball, while its museum description claims they are in no way able to determine its practical use, much less the mysterious number on its side.