From the Super Mario Wiki
When the player decides to stop here, they meet Cheep-Cheep and Coach, his yellow and white Cheep-Cheep coach. His quest, Swimmin' Wimp, involves racing against Cheep-Cheep in a pool relay, but the player must lose, and make it a close race. They cannot go too far ahead, or too far behind, otherwise Cheep-Cheep catches on and the race automatically ends. If Cheep-Cheep wins, the coach rewards the player with the Gaddget, Desktop Golf.
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