Dr. Frankenollie
Dr. Frankenollie is a member of the Villain League, and the main antagonist to some extent of Runaway Brain. He is a mad scientist who attempted to switch Mickey's brain with that of his giant monster Julius, he put an ad in the newspaper promising to pay his employer 999 dollars Mickey answers the ad and he captures him, during the brain switch he attaches helmets to their heads and activates a switch while laughing manically causing a large explosion, Mickey awakes to find himself in Julius' body and finds a charred Frankenollie and tells him to change him back but it is too late he is dead and he disintegrates in Mickey's hands. He will return as a Villain League member in a future movisode to come.