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Fanboy and Chum Chum are fans of all things science fiction and fantasy, and wear wild superhero costumes with their underwear on the outside. Their lives are filled with adventure, from Fanboy's teacher turning into a zombie to an ice monster operating the Frosty Freezy Freeze machine. Their pal Kyle usually tags along on their escapades. Kyle is a real wizard, but Fanboy and Chum Chum are oblivious to his mystical powers, although they live in a world of fantasy.
Man-Arctica tries to prove who he is when Fanboy and Chum Chum refuse to believe him.
The boys throw out everything they believe to be baby toys, leaving them with an empty Fanlair.
After the boys accidentally release the monkey from Boog's favorite video game, Chum Chum sneaks into the machine and pretends to be Chimp Chomp so that Boog doesn't find out.
Kyle's scheme to cheat his way back into Milkweed backfires when his spell for crib notes turns him into a baby.
The boys get locked in the school right before summer vacation.
Lenny goes back in time to stop the boys from having their first Frosty Freezy Freeze.
Fanboy and Chum Chum accidentally cause Kyle to lose a tooth, which means the Wizard Tooth Fairy is coming. But unlike the normal Tooth Fairy, when the Wizard Tooth Fairy comes, he takes all your teeth.
Boog meets a bully much bigger and more aggressive than him.
Fanboy forgets Chum Chum's birthday, and desperately scrambles to find a gift for him.
When Fanboy learns that he is the king of the janitors, Janitor Poopatine is forced to tutor him by the Custodial Council.
After losing their memories from a wicked brain freeze, Fanboy and Chum Chum must retrace their steps to locate their missing underwear.
Fanboy and Chum Chum can't figure out how to get slimed on Slime Day, because they don't know the secret phrase. So they travel to the Nickelodeon studio to get the secret phrase from the president of the company.
Fed up with Boog's bullying, Fanboy builds up an electric charge so he can shock Boog.
When Oz's cousin, Brizwald, comes to town, Oz is certain he is after his most valuable Man-Arctica comic book.
Hall monitors Fanboy and Chum Chum complicate Kyle's attempt to get back into Milkweed Academy.
Fanboy and Chum Chum win a dream vacation and believe that means they can take it at the Frosty Mart.
Fanboy and Chum Chum try to derail a field trip to the horrible Glop Mines, where they've heard that a kid-eating glop monster lives.
When Fanboy and Chum Chum lose their taste sense to a Halloween spirit, Mr. Trick, they try to bring him 1,000 screams in order to get it back.
When the boys crash land on Planet Hasselhoth, their friendly visit with Man-Arctica results in the trio's capture by Man-Arctica's nemesis, Global Warmer.
When Oz's new, vintage Boom Bot toy hypnotizes him into selling items whenever the doorbell to his shop rings, he ends up selling all of his collectors' items.
