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Brain-O the Magnificent

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Radioactive Man Icon.png The contents of this article or section are related to the Radioactive Man universe. They are considered fictional in The Simpsons.
Brain-O the Magnificent
Brain-O the Magnificent.png
Supervillain Information
Male ♂
Alias(es): Javier
First appearance: The Heroic Life and Mortifying Death of Radioactive Man: Chapter I

Brain-O the Magnificent is the master of cerebrum, who once fought with Radioactive Man.


Radioactive Man once defeated Brain-O and handed him over to the police. During the fight, Brain-O hit Radioactive Man with a Xeno Ray Cannon, which was absorbed by Radioactive Man. This Xeno Ray energy then affected Radioactive Ape, causing him to go through multiple changes.[1]

Brain-O the Magnificent was one of the many villains that Radioactive Man defeated before his supposed death.[2]

Brain-O the Magnificent attended the wedding of Larva Girl and Radioactive Man. When fighting broke out at the wedding, Brain-O was defeated by Radioactive Ape.[3]

Brain-O the Magnificent went undercover as the Superior Squad's new butler, Javier, in order to defeat them. Brain-O the Magnificent locked the Superior Squad in their Rumpus Room and set the automated training tools inside to attack them. The Superior Squad cut a circle in the glass out then Purple Badge of Courage punched him, knocking Brain-O's head off his body and down the stairs. A teenager then picked up his head and walked off with it.[4]