Radioactive Man has escaped from the fictional world of Bart Simpson to appear in a real comic book intermittently published by Bongo Comics, which has also published, since 1994, a number of comics featuring Bart Simpson, the Simpson family, and other characters from the television show.
Issue #1 of the Bongo comic differs from RM #1 as seen in Simpsons episode "Three Men and a Comic Book". While featuring a similar scenario and accident (Claude getting his trousers caught on barbed wire just before a mega-bomb explodes), the Bongo series' Claude was not wearing tattered clothes. In the books, Claude's survival is due in part to a large thunderbolt shaped chunk of metal being attached to his head. Throughout the book series the shard of metal was always attempted to be removed, but each attempt has nasty consequences which results in it being put back in his scalp again.