Chompasaurus

Chompasaurus is an aquatic dinosaur resembling a plesiosaur who lives in the lake inside the mountain of Terrydactyland. When you first encounter him, he swallows Banjo and Kazooie whole. However, once they're inside, Chompasaurus explains that he has a stomach problem and that he needs their help, which leads to an FPS minigame. Once the job is done, Chompasaurus spits the duo out and rewards them with a Jiggy.