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Chompa's Challenge is a minigame in Terrydactyland in Banjo-Tooie. The player must either fly onto the platform or use the Springy Step Shoes inside the mountain. Once on the platform, the Chompasaurus will swallow Banjo, bringing him inside it's stomach, tasking him to use the Breegull Blaster to kill 75 or more of Chompa's stomach ulcers.
If the player gets 75 points, Chompa will give you a Jiggy that he thought it was a biscuit.