Buyon

A Buyon in Twinkle Park.

The normal Buyon.

The Buyon (ブヨン), also known as their model number E-09 Buyon, is a badnik that appears in Sonic Adventure and part of the E-Series.

It's a rabbit-like badnik that hops around while iddle and will inflate it's middle section when an enemy comes close. Though it's quite slow in this state and wobbles a lot, the gellatine-like belly is indestructible, bouncing a character over and over again, and only an attack to the head can detroy the badnik. Every now and then, it reverts shapes back to the iddle mode, but it's quite quick. It appears in Twinkle Park for Sonic and Amy.