Mr. Vile

Mr. Vile is a character found inside the enourmous crocodile at Bubblegloop Swamp in Banjo-Kazooie. He challenges Banjo's crocodile trasformation to try and eat more Yumblies than him. The prize after three rounds is a Jiggy, but losing a round will cause Mr. Vile to try and chomp Banjo for 2 damage. Once the Jiggy is earned, Mr. Vile offers a second challenge of playing three rounds for 3 extra lives at the cost of 1 life for a loss.

Mr. Vile will be returning in Banjo-Kazooie: Nuts & Bolts, and is said to have grown a bit since Banjo-Kazooie.