Who becomes comic book guy's Arch-nemesis in comic book guy?

In the "The Simpsons" episode titled "Comic Book Guy: The Comic Book," Comic Book Guy's arch-nemesis is introduced as a character named "Apu." Their rivalry stems from Apu's success in the comic book business, which threatens Comic Book Guy's status and authority in the comic book community. This competition leads to various humorous confrontations between the two characters throughout the episode.