The players are shown standing on a gigantic desk with art materials. A group of Goombas on a stack of books comes toward them as they hop into their paintball machines, and the game starts.
Each player or team competes to paint the eleven Goombas roaming around the square stage in their color by shooting paintballs at them; Goombas can be "repainted" if hit by a different-colored paintball. The paintball machines are restricted to opposite sides of the stage, and teammates cannot move past each other; hitting opponents with paintballs will stun them briefly.
Whoever has more Goombas painted in their color wins; a tie can occur only if an even number of Goombas are painted.
On the stage, the winning characters celebrate as they walk back to the paintball machines, while the losers sulk before they run around to avoid being shot at by the winning players. If the minigame ends in a tie, all characters will sulk and look dejected.
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