From Loonipedia

Massive is a very large criminal who can control gravity and has a very hard body structure that even lasers cannot penetrate. He is voiced by the late Michael Clarke Dunkan.

Robot Massive[edit]

In "the hunter" episode of loonatics unleashed Otto the Odd built a robot massive to act as a decoy for Electro J. Fudd to help capture The greatest hero of all time, it was then ultimately destroyed by Tech E. coyote.