Brain-O the Magnificent

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

Appearances

• Comic story – The Final Collision (mentioned)
• Comic story – The Heroic Life and Mortifying Death of Radioactive Man: Chapter I
• Book – The Bart Book (mentioned)

The Simpsons characters

The Simpsons and relatives Jacqueline Bouvier • Patty Bouvier • Selma Bouvier • Abraham Simpson • Bart Simpson (Bartman • El Barto) • Homer Simpson • Lisa Simpson • Maggie Simpson • Marge Simpson • Mona Simpson Jub-Jub • Plopper • Santa's Little Helper • Snowball II Around Springfield Kumiko Albertson • Ms. Albright • Jasper Beardley • Benjamin • Blue-haired lawyer • Shauna Chalmers • Comic Book Guy • Crazy Cat Lady • Larry Dalrymple • Doug • Eddie • Maude Flanders • Ned Flanders • Julio Franco • Jonathan Frink • Gary • Alice Glick • Barney Gumble • Gil Gunderson • Constance Harm • Bernice Hibbert • Julius Hibbert • Julius Hibbert's daughter • Julius Hibbert's oldest son • Lionel Hutz • Jacques • "Just stamp the ticket" man • Princess Kashmir • Hyman Krustofsky • Akira Kurosawa • Cookie Kwan • Grady Little • Lou • Helen Lovejoy • Jessica Lovejoy • Timothy Lovejoy, Jr. • Barry Mackleberry • Jerri Mackleberry • Jack Marley • Horatio McCallister • Milo • Hans Moleman • Marvin Monroe • Eddie Muntz • Mrs. Muntz • Bleeding Gums Murphy • Lindsey Naegle • Nahasapeemapetilon octuplets (Anoop • Gheet • Nabendu • Poonam • Pria • Sandeep • Sashi • Uma) • Apu Nahasapeemapetilon • Manjula Nahasapeemapetilon • Sanjay Nahasapeemapetilon • Old Jewish man • Ruth Powers • Gareth Prince • Gloria Prince • Joe Quimby (Mayor Quimby's body guards) • Martha Quimby • Raphael • Luigi Risotto • Nick Riviera • Sam • Gerald Samson • Agnes Skinner • Roy Snyder • Spuckler children (Dubya • Whitney) • Brandine Spuckler • Cletus Spuckler • Squeaky-voiced teen • Strawberry • Disco Stu • Moe Szyslak • Kirk Van Houten • Luann Van Houten • Clancy Wiggum • Sarah Wiggum • Yes Guy • Artie Ziff Celebrities Bill and Marty • Booberella • Kent Brockman • Bumblebee Man • Scott Christian • Duffman • Matt Groening • Krusty the Clown • Lurleen Lumpkin • Troy McClure • Sideshow Mel • Roger Meyers, Jr. • Arnie Pye • Pyro • Dave Shutton • Jebediah Springfield • Miss Springfield • Drederick Tatum • Mr. Teeny • Rainier Wolfcastle (McBain) Springfield Elementary School faculty and students Chuck Berger • Black weasel • Wendell Borton • Gary Chalmers • Lewis Clark • Database • Lunchlady Dora • E-mail • Rod Flanders • Todd Flanders • Ham • JJ Hibbert • Elizabeth Hoover • Sophie Jensen • Jimbo Jones • Edna Krabappel • Coach Krupt • Dewey Largo • Sherri Mackleberry • Terri Mackleberry • Otto Mann • Audrey McConnell • Nelson Muntz • Nell Nicholson • Brunella Pommelhorst • Janey Powell • Martin Prince • J. Loren Pryor • Report Card • Richard • Dolph Shapiro • Becky Shorter • Nina Skalka • Seymour Skinner • Cosine Tangent • Allison Taylor • Milhouse Van Houten • Wanda • Ralph Wiggum • Groundskeeper Willie • Hubert Wong • Yellow weasel • Jaffee Ziswhisky • Üter Zörker • Kearney Zzyzwicz Blond-haired boy with glasses • Brown-haired boy • Buck-toothed boy • Buck-toothed girl • Girl with glasses • Lewis look-alike • Long haired girl Springfield Nuclear Power Plant Blinky • Charles Montgomery Burns (The Hounds) • Carl Carlson • Charlie • Lenny Leonard • Waylon Smithers, Jr. • Smitty Villains Sideshow Bob • Frankie the Squealer • Herman Hermann • Snake Jailbird • Kang Johnson • Kodos Johnson • Legs • Louie • The Rich Texan • Hank Scorpio • Johnny Tightlips • Fat Tony Other characters Capital City Goofball • Jesus Christ • Santa Claus • Devil • Fallout Boy • Itchy • God • Leprechaun • Richard Nixon • Poochie • Radioactive Man • Scratchy Families The Simpsons • The Bouviers • The Flanderses • The Hibberts • The Krustofskys • The Lovejoys • The Spucklers • The Van Houtens • The Wiggums • The Muntzes Miscellaneous Doppelgängers • Fictional characters • LGBT characters • Animals • Deceased characters • Crossover characters • One-time characters • Recurring characters • Non-canon characters