Evil Way Big is the main villain in the movie Ben 10: Destroy All Aliens.
He looks similar to Way Big from Ben 10: Alien Force and Ben 10: Ultimate Alien but with the red parts being blue and the white parts being grey. He has red eyes, and a red circle instead of the Omnitrix symbol.
In Ben 10: Destroy All Aliens, Evil Way Big appeared because of an error in the Omnitrix which turned Azmuth into it. He attacked Ben but was sucked into the Omnitrix. Ben, Gwen, Tetrax Shard, and Retaliator were later sucked into the Omnitrix and met him on Tetrax's home planet. When all four escaped the Omnitrix, he also escaped. Ben used Way Big to fight him. Way Big talked Evil Way Big to clear his thoughts after discovering that he was Azmuth.
Retaliator fixed the Omnitrix and at the end he changed back into Azmuth.
- Due to being an evil counterpart of Way Big, his appearance resembles Chaos Ultraman, the evil clone of Ultraman Cosmos.