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.
Episode 1
The boys go to the Frosty Mart to by Frosty Freezy Freezes, but Chum Chum spends their only dollar on Boog's Chimp Chomp game.
Episode 2
The boys think Kyle (the new kid) is a pretend wizard. But, the boys soon learn that their new friend is an actual wizard expelled from a wizard school called Milkweed Academy.
Episode 3
Fanboy trades Chum Chum for Yo's Mecha-Tech robot.
Episode 4
Yum Yum (Fanboy and Chum Chum's gum friend) comes to school, but the new janitor is on the case.
Episode 5
After they accidentally "power down" Yo's digital pet cat Scampers, Fanboy and Chum Chum bury it at the graveyard only to make it come back as a zombie.
Episode 6
Fanboy and Chum Chum have a test coming up and if the entire class passes, they win a bouncy house. Fanboy decides to install his brain into Oz's robot to get smarter, but worse results come to follow.
Episode 7
When a heatwave hits Galaxy Hills, the boys see the Frosty Freezy Freeze machine is on the fritz. They try to nurse Berry, the ice monster who runs the machine back to health but wind up getting "Frosty Freezy Freeze Fever" the moment they lick him.
Episode 8
Fanboy suspects he's bitten by a vampire, and the boys go see a neck specialist who IS a vampire.
Episode 9
Boog believes he saw a monster in the Frosty Mart, and Fanboy and Chum Chum help him catch it.
Episode 10
Boog will do anything for the boys if he wants to get one of their 3 tickets to see a Chimp Chomp movie.
Episode 11
Fanboy and Chum Chum take home and care for the class pet pig, Precious. But Mr. Mufflin catches Fanboy teaching him kung fu and thinks he's hurting him, so he takes Precious back and Fanboy can no longer care for him.
Episode 12
Fanboy, Chum Chum and Kyle get Kyle's Scrivener Elf to write fake excuse notes to get out of various classes.
Episode 13
Chum Chum shows Fanboy a time of day called Night-Morning (midnight). Fanboy invites the whole class over to party, but it doesn't seem as fun to them as Fanboy and Chum Chum do.
Episode 14
Fanboy and Chum Chum meet a Viking named Thorvald, and try to get him back home to Valhala.
Episode 15
When Fanboy and Chum Chum are punished for making a mess in the cafeteria, they have to help Janitor Poopatine clean up the school.
Episode 16
Fanboy refuses to bathe for a not bathing record, but his right hand on his super-suit comes to life and threatens to rob the school's charity bake sale.
Episode 17
Fanboy and Chum Chum try to convince Oz to sell something so he doesn't lose his store to his mom, who plans on turning the store into a frozen yogurt shop.
Episode 18
Lupe falls in love with Fanboy after he "saves" her from a spider. Problems arise when she won't stop pestering Fanboy once love-struck.
Episode 19
Fanboy assembles a mop girlfriend as a date for his school dance. However, when Chum Chum's date, his cousin from West Apetown, arrives at the dance as well, Fanboy falls for her.
Episode 20
Prank Day arrives and the boys can't wait to show off their skills. But when Yo can't stop pranking Fanboy, the boys are forced to enlist Boog to help them prank her back.
Episode 21
The kids are grossed out when the new lunch lady serves only disgusting, red glop and won't let them leave until they finish eating it. So, everyone tries to escape the cafeteria.
Episode 22
The boys are desperate to keep a recalled toy of their favorite octopus cartoon character named Agent 08.
Episode 23
Lenny and Boog plot to steal Fanboy and Chum Chum's special cup that gives them unlimited free refills.
Episode 24
The boys wind up in the wrong playground and are mistaken for preschoolers. While there, they encounter Marsha, Fanboy's archenemy.
Episode 25
The boys learn to take care of business when a Secret Shopper comes to the Frosty Mart.
Episode 26
Kyle transforms into a chicken after getting the chicken pox, so the boys try to get him to turn back to normal by laying an egg.
Episode 27
The boys want to buy a Frosty Freezy Freeze from the Frosty Mart's new bus, but Boog won't let them. So, they try to find a way to get their treats without getting bopped.
Episode 28
The boys are under the weather, and when they wind up fighting each other, they also fight over Kyle's attention when he comes to visit them.
Episode 29
The boys switch noses for class picture day, but rivaly is just around the corner.
Episode 30
Fanboy and Chum Chum buy Boog's plastic bubble from a yard sale, but Boog gets outraged when he descovers it makes the riders bop-proof.
Episode 31
After Hank takes away everyone's toys due to no toys allowed in class, he mistakes Chum Chum for one and takes him as well.
Episode 32
Thorvald visits Fanboy and Chum Chum and they help him get his battle axe back from the lunch lady.
Episode 33
Fanboy worries that he's shrinking, and moves into Yo's dollhouse.
Episode 34
Fanboy is turned into a puppet and tries to prove himself worthy by doing a good deed, but it doesn't go well.
Episode 35
While Chum Chum leaves Fanboy by himself to care for his new Ultra-Ninja, Fanboy accidentally breaks it, and tries not to let Chum Chum know.
Episode 36
Fanboy trains himself to be ambidextrous in order to be a better class clown.
Episode 37
Fanboy gets amnesia, causing Chum Chum to become an open target for Yo.
Episode 38
The boys teach Boog how to stop bopping so he can stay at the Frosty Mart.
Episode 39
When Lenny's bike gets destroyed outside the Frosty Mart, Fanboy and Chum Chum try to determine who did it.
Episode 40
Kyle is not pleased when his old rival, Sigmund the Sorcerer, shows up in Galaxy Hills. And when Sigmund comes over to his place for dinner, Kyle tries to pass Fanboy and Chum Chum off as his elf assistants.
Episode 41
While playing pirates, the boys accidentally bury the map with the treasure, so they get the whole class together to help find it.
Episode 42
Man-Arctica takes a game of freeze tag up to a new level by freezing everybody! Fanboy and Chum Chum do their best not to get frozen.
Episode 43
Lenny tries to ruin Fanboy and Chum Chum's chances of winning a million Frosty Bucks by stopping them from writing a jingle.
Episode 44
Kyle tries to find out how Fanboy can connect two rings together.
Episode 45
Chum Chum grows into a Chulk, and Fanboy has fun. But when Chum Chum shrinks to normal size due to Boog scaring him, Fanboy tries to make him grow again.
Episode 46
The boys have no luck while searching for a cereal box toy that's in limited condition, so they seek help from Oz.
Episode 47
The boys start a lemonade stand, but Lupe and Yo start a competing one across the street.
Episode 48
Fanboy swipes Kyle's spellbook to finish his book report, but ends up turning Mr. Mufflin into a zombie.
Episode 49
The boys' desks are separated for singing out loud during "Quiet Time", so they try to get reunited.
Episode 50
Fanboy, Chum Chum and Kyle go camping on the Frosty Mart roof, but Kyle accidentally drops the rope to get down, forcing the boys to try and survive in the roof's bitter, cold, frosty weather!
Episode 51
Fanboy and Chum Chum are eager to ride a new roller coaster, but Fanboy's excitement later turns into fear.
Episode 52
Man-Arctica poses as a storeworker named Stan at Oz's when Fanboy and Chum Chum believe that he disappeared forever.
