Wacky is a neutral Chao with mainly lime green skin. They also have the standard Chao's wings on their back, round tail, and floating dot above their head. However, Wacky has three quill-like spikes swept backwards on their head, green stripes along said apikes, and red-tipped feet. THey also have dark blue eyes and an angry expression on their face.
In Sonic Adventure 2 and its remake Sonic Adventure 2: Battle, Wacky is a level five expert opponent in Chao Karate. In gameplay, Wacky acts short-tempered while fighting in Chao Karate. Their recommended status is 10.