Dr. Buttocks

Dr. Buttocks is the Netherworld's greatest evil scientist with an ego rivaling that of Betrayus and is Butt-ler's twin brother. He specializes in inventing evil gadgets with his superior intellect, which he never passes up an opportunity to brag about. He is one of the main villains in Pac-Man and the Ghostly Adventures. He hates his twin brother, Butt-ler. (And the feeling is mutual) He finds out the Ghost Gang are working with Pac-Man, but always fails to show Betrayus. His ego and arrogance is eclipsed only by Betrayus. Buttocks wears a mechanical claw on one arm.

He is voiced by Brian Drummond (who also plays Clyde and Butt-ler) with a hint of a French or German accent. Which is odd considering Butt-ler has a British accent.