Mosh-Pit Playroom is a minigame in Mario Party 8. It takes place in some sort of playroom and the characters are toy size. The Wii Remote is held sideways; the D-Pad moves the player two dimensionally, and the 2 button is used to jump. It is a 4-player minigame.
The four characters appears toy sized in a playroom. Then Fly Guys will dump a bunch of colored balls on the playroom and the characters have to get their own colored balls (for example Player 1 has to get the Blue Balls and Player 3 has to get the Green Balls). The first player that gets all 50 of his/her own colored balls will win.