The solo player chases the group players into a room with a stage, sucking them into a box. The camera points inside the box as the minigame then starts.
The solo player's objective is to shake the box around and eliminate the group players by tilting the Spiny Shells into them. The group players must survive for 30 seconds with at least one of them remaining in order to win.
In Mario Party 6, if the team wins, any players who are still standing will perform their victory animations from within the box. If the solo player wins, they will stand on the stage and perform their victory animation.