The Chimp is a character who Mario first meets in Fluffy Bluff Galaxy mission "Search For the Toad Brigade Leader" in Super Mario Galaxy 2. He claims that he is the best gamer of all time, and out of cockiness will challenge Mario to a mini-game; and upon completion will fork over a Star. The minigame is "The Chimp's Stomp Challenge."
The Chimp also appears at the Honeyhop Galaxy where he challenges Mario to a minigame similar to the one at the Fluffy Bluff Galaxy with a minigame that is "The Chimp's Score Challenge". Mario must defeat many enemies and collect coins.