Mervin Monroe - Fallout Boy

Fallout Boy

In the series, Fallout Boy first appears in a 1950s Radioactive Man serial film shown at a comic book convention in the episode "Three Men and a Comic Book." However, unlike many Simpsons characters, he has only made a handful of appearances since. While Radioactive Man is a broad parody of many superheroes, most obviously containing elements of Batman and Superman (and the comic incorporates an origin story similar to Marvel's Hulk), among others, Fallout Boy is mainly a parody of Robin (with his costume, references as being the 'young ward' of Radioactive Man, and his younger age and sidekick status) with elements of Spider-Man (his fictional comic book origin, for example). His catchphrase is "Jiminy Jillickers!"

Additionally, Fallout Boy also appears in a real-life comic book titled Radioactive Man, published by Bongo Comics (a comic created in part by Matt Groening, the creator of The Simpsons). In these comic books, Fallout Boy's real name is Rod Runtledge, he has a brother named Dodd Runtledge, and they live in Zenith City. Rod is a high school nerd living with his aunt, Aunt June.

Fallout Boy was an average book worm, until one day, he was at a Radioactive demonstration, where he met up with Claude Kane. A tall piece of machinery fell towards them. Claude grabbed Rod and jumped over the rail, Claude holding onto the machine. The machine came to life, and as the ray passed through Claude, who became Radioactive Man, it hit Rod. Rod then got a pint-sized version of RM's powers and became Fallout Boy.

In the episode "Radioactive Man", Milhouse was chosen over Bart to play Fallout Boy in the Radioactive Man movie to be filmed in Springfield. Rock band Fall Out Boy took the name of this character after, when they asked a concert audience what band name they should have, a fan shouted "Fallout Boy!"