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. The gimmick here is the four Warp Pipes, one in each of the board's corners. Players that go into a pipe are taken to one of the other three Warp Pipes on the board. These provide shortcuts to opponents or to start spaces, but they do so at random. In Story Mode, the player has to duel Donkey Kong (or Luigi) on this board for the Strength Star Stamp.