Rex King

One of Sunshine039s star pupils Rex King is from the United States. His right arm is actually a Tyrannosaurus head and neck known as the Jurassic Hand . In truth he is actually a dinosaur and his quotJurassic Handquot is his real head and what appears to be his quotheadquot is a fake and it only stores his brain. After fighting Terry for a while he was put into a strangle hold that started fossilizing his Dinosaur hand. He pummeled Terry the Kid with his brutal attacks but Mantaro helped out Terry by telling chillingly bad jokes coldness being a dinosaur039s weakness and ended up having his head crushed to bits by Terry039s finishing move. He bears a resemblance to Beast Wars039 Megatron. wikipedia