Mayhem is the Power Watch's DNA sample of an unknown species from an unknow planet. He only exists in the Mad Ben timeline.
Mayhem has the appearance of a tall, muscular alien. He has a skull-face which is permanently on fire, a black jacket with a skull design, a chain on his wrist, black spiked pants, orange spiked shoulder patches, his left arm is made of just his muscles and bones, he has a robotic right arm with a chainsaw and wears the Omnitrix symbol on his chest.
Powers and Abilities
- Brian Bloom voices Mayhem.
- He speaks with deep husky voice.
- The skull on Mayhem's chest is based on Punisher from Marvel Comics.