Time Eater is a giant lizard-like creature with yellow eyes, sharp teeth, wires attached to his upper and lower body, and horns on the top of his head and tentacles with mouths on then. He also boasts an extra mouth on his abdomen.
He shares his design with Perfect Chaos, the final boss of the Dreamcast game Sonic Adventure. He also shares his name with the final boss of Sonic Generations.
Time Eater's design is heavily based on Biollante, from the Godzilla franchise.