Chomping away at the bit for eternity, this memorable badnik is well known to anyone who has gotten frustrated with Marble Zone in Sonic 1. A surprisingly ingenius design on Robotnik's part, the only vulnerable spot on this bug is it's head. Hit anywhere else and it's pieces break apart and bounce around, and you're in a world of hurt. Rolling into it also doesn't always prove success, thanks to it's gaping teeth. While the ground-bound Caterkiller is mostly exclusive to the first Sonic game, he would have other, flying iterations in Sonic games to come, like Caterkiller Jr. in Sonic 3, and the large flying caterkiller-like robots in Sonic Adventure. Keep on chompin' pinky.