Way Big

Way Big is a To'kustar, an enormous alien, nearly 100 feet tall, and by far the biggest alien in Ben's arsenal.

Appearance
Way Big's appearance is somewhat reminiscent of tokusatsu superheroes, particularly those of the Ultra Series. Waybig's size grants him extraordinary strength and invulnerability to most attacks; however, in proportion to his size, Waybig does not seem to be any more durable than normal, as Vilgax is able to cause him pain by digging into Waybig's hand with his sharp claws.

History
Way Big first appears in Ben 10: Secret of the Omnitrix, when Azmuth activates it on the Omnitrix so Ben can fight off Vilgax's army. His only appearance in the original TV series itself was in "Ken 10" when Ben 10,000 loses his temper and mercilessly pummels Kevin 11,000 into the ground after the latter pushes him too far by injuring Ken.