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)

Radioactive Man

Comics #1 • #9 • #23 • #27 • #67 • #72 • #900 • Lucy Nukem • Meets Captain Code • Meets The Kansas City Royals • vs. Swamp Hag • vs. Muhammad Ali • vs. Restless Leg Syndrome • My Enemy Myself TV series 1950s Serial • 1960s Series Films 1967 film • Radioactive Man II: Bring On the Sequel • Radioactive Man III • Rainier Wolfcastle film • Radioactive Woman People Patty Bouvier • Selma Bouvier • Buddy Hodges • Krusty the Clown • Arnold Leach • Sherri Mackleberry • Terri Mackleberry • Morton Mankiewicz • Troy McClure • Dirk Richter • Milhouse Van Houten • Rainier Wolfcastle Other Characters • Radioactive Mon: Reggae Rock • Zenith City

Superheroes

The Bart Allegiance Bartdog • Bartman • Houseboy • Supercat DC Comics superheroes Aquaman • Batman • The Flash • Green Lantern • Hawkman • Krypto • Plastic Man • Robin • Shazam • Storm • Supergirl • Superman • Wonder Woman The Dependables Early Bird • Hot Flash • Fruit Bat Man • Nick Fury* • Iron Lung • The Rambler Lazy League Captain Couch Potato • Doctor Dull • Lethargic Lass • The Punster • Sloth Man • The Suede Loafer The League of Superheroes Betty Firecrocker • The Komedian • Pastry Face • Pie Man Marvel Comics superheroes Captain America • Ant-Man • The Avengers • Baymax • Black Panther • Black Widow • Blade • Deadpool • Drax the Destroyer • Dum Dum Dugan • Falcon • Fandral • Fantastic Four (Mr. Fantastic • Invisible Woman • Human Torch • The Thing) • Nick Fury • Gamora • Giant-Man • Groot • Agatha Harkness • Hawkeye • Heimdall • Hulk • Iron Man • Captain Marvel • Mole Man • Namor • Odin • Quicksilver • Rescue • Rocket Raccoon • Scarlet Witch • She-Hulk • Sif • Silver Surfer • Spider-Man • Doctor Strange • Thor • Vision • Wolverine • Professor X Oldblood Badpan • Codger • Coma • Phogey • Vague Piemen of the World Captain Kidney Pie • Colonel Custard • Mademoissele Meringue • Man O' Pies • Pie Man • Señor Fritatta The Secret Society of Super-Simians Combo-Rilla • Flash Gibbon • Humongo • Inspector Baboon • Radioactive Ape Springfield Avengers Captain America (Herman Hermann) • Ant-Man (Ned Flanders) • Black Widow (Agnes Skinner) • Falcon (Julius Hibbert) • Nick Fury (Carl Carlson) • Giant-Man (Rainier Wolfcastle) • Agatha Harkness (Selma Bouvier) • Hawkeye (Milhouse Van Houten) • Iron Man (Barney Gumble) • Captain Marvel (Helen Lovejoy) • Mole Man (Hans Moleman) • Quicksilver (Comic Book Guy) • Rescue (Shauna Chalmers) • Scarlet Witch (Patty Bouvier) • She-Hulk (Elizabeth Hoover) • Doctor Strange (Nick Riviera) • Thor (Lisa Simpson) • Vision (Moe Szyslak) Springfield Super Squadron Barfly • Bartman • The Black Belch • Captain Keen • Coma • The Entangler • The Human Torque • The Ingestible Bulk • Iron Foot • The Jazzler • Kid Queasy • Captain Kwik • The Mighty Smiter • The Mirror Maidens • The MudSlinger • Nuclear Power Man • Pigboy • Plaid Piper • The Scarlet Whimpernel • The Sciencester • Vampiredna The Superheroes We Need Fluff • Fold • The Handyman • Julienne • Leftover Man • Meterman • The Mincer • Nanny BooBoo • Polite Society • The Q • The Sitter • Stainless • Tax Man Superior Squadron Black Angus • Bloody Heart • Bug Boy • Fallout Boy • Lure Lass • Major Mollusk • Plasmo the Mystic • Purple Haze • Radio Man • Radioactive Man • Captain Squid • Weasel Woman Superior Squadron allies Bart • Black Partridge • Bug Mom • Citizen Solar • The Collider • Libby • Neutrino • Radioactive Boy • Radioactive Dog • Radioactive Man-Beta • The Radioactive Manqués • L'il Squiddie • Starla • Wind Lad Vindicators Airshot • Black Voodoo • Hydrangea • Magnesium Man • Moby Man • Quetzelica The Whatever People Cashbak • Flightrisk • Metronome • Obrian • Yentah Other The Amazing Lenny • The Ant • Susan B. Anthony Man • Astro Boy • Atlasman • Badgerine • Badgirl • Bartgirl • Bartgirl (Bartman vs. Doctor Octuplets) • Bartman • The Belcher • Biclops • Biclops (Biclops vs the Diplopian Duo!) • Kid Blackula • Blossom • Bouncing Battle Baby • Braaap-Man • BrainBaby • Bubbles • Busman • Buttercup • The Candy Man • Clobber Girl • Commander Cool • Crimson Cockatoo • Cupcake Kid • Danger Dog • Darkwing Duck • Deadbeat Dad • Doctor Doctor • Doctor Strange Doctor • Everyman • Fallout Girl • Fighting Owl • Four-Eyes • Gill-Man • GlueStick • Great Maggeena • The Green Gil • He-Man • Hellboy • Itchin • Karl • The Laughter • Lisa the Conjuror • Mac • Mature Lass • Meatball Boy • Ms. Meow • Mini-Mom • The Mulk • Dr. New Haven • The Noir Nightingale • Captain Nuclear • Nuthatch • Octoclops • Old Man • Dash Parr • Helen Parr • Jack-Jack Parr • Violet Parr • The Pound Puppy • Powersauce Girl • Captain Quiche • Radioactive Fig • Radioactive Woman • Wee Roachy • Robartman • Round Robin • Salesman • Sax-Men (Professor Sax) • Scarlet Pimpernel • Scratchman • The Sequelizer • The Silencer • Silvery Skateboarder • Sprinkle • The Sprint • The Stickler • Stretch Dude • The Super-Intendent • Super Lincoln • Superman • The Thung • Uber Hombre • Valkena the Viking • Chief Wig-Man • Wee Willie • Wonders-Why Woman • The Wonderful Twins • Xena • Zorro

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 Carlsons • 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