Evil Way Big is the main villain of the Ben 10 videogame Ben 10 Ultimate Alien: Cosmic Destruction, as well in the forth Ben 10 movie, Ben 10: Destroy All Aliens.
Ben 10: Destroy All Aliens
In the movie, 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, 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 (in his Upgrade Suit) fixed the Omnitrix and at the end he changed back into Azmuth.
Ben 10: Ultimate Alien Cosmic Destruction
Evil Way Big was used by Albedo and was defeated by Ben Tennyson as Way Big.