Boulder Ball, MarioWiki

Boulder Ball is a 1 vs. 3 mini-game that appears in Mario Party 3. The single player must try and hit the other three players with the boulders to keep the other three players from reaching the top platform. The player could also use the walls to help make the boulders roll at angles that could take out multiple players. If the single player manages to keep the three players from reaching the top platform in time, they wins. The three players must attempt to run up the very steep ramp and reach

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