Character Description from Frogger 2: Swampy's Revenge:
Swampy the Crocodile is sneaky, brutish, sly, greedy and above all dastardly! Swampy doesn't like frogs. In fact, Swampy doesn't like anything much, least of all Frogger. He's out for revenge and his plans involve the frog babies. But just what is he up to?