Prehistoricuis is the main antagonist of Nicktoons: Clash of the Ancients. He is made of phrehistoric animal bones his head is a human skull with mammoth tusks on the side the torso is a large rib cage with a stegosaurus plates his arms are two basic bones with one hand being a t-rex skull another a triceratops.

Backstory: Prehistoricuis is created with Jimmy neutron's reviver he used this power to make many cronies but despite his evil he is very animated .