Crocodile Transformation

From RWP Wiki

In Banjo-Kazooie, once you enter Bubble Gloop Swamp and find Mumbo, he can turn you into a Crocodile.

In Crocodile form, Banjo can bite enemies (this the only transformation in Banjo-Kazooie that you can attack with), swim in poisonous water, and climb up some surfaces with more ease.

One main uses of the the Crocodile transformation is defeating Mr. Vile's challenges to get a Jiggy. The challenge involves eating on-screen enemies within a time limit.