From the Super Mario Wiki
Pipesqueak is one of the Duel Boards in Mario Party 3. The name of the board is a pun on the term Pipsqueak. This board's gimmick are the four Warp Pipes in each corner. Players that go into a pipe are taken to one of the other three Warp Pipes on the board at random, meaning using one could both hinder and help players who enter one. In Story Mode, the player has to duel Donkey Kong (or Luigi) on this board for the Strength Star Stamp.