S1 E1 • Wizboy
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.
S1 E2 • Pick a Nose
The boys switch noses for class picture day, but rivalry is just around the corner.
S1 E3 • The Janitor Strikes Back
Yum Yum (Fanboy and Chum Chum's gum friend) comes to school, but the new janitor is on the case.
S1 E4 • Dollar Day
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.
S1 E5 • Trading Day
Fanboy trades Chum Chum for Yo's Mecha-Tech robot.
S1 E6 • The Hard Sell
S1 E7 • Digital Pet Cemetery
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.
S1 E8 • Fanboy Stinks
S1 E9 • I, Fanbot
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.
S1 E10 • Berry Sick
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.
S1 E11 • Chimp Chomp Chumps
Boog will do anything for the boys if he wants to get one of their 3 tickets to see a Chimp Chomp movie.
S1 E12 • Precious Pig
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.
S1 E13 • Monster in the Mist
Boog believes he saw a monster in the Frosty Mart, and Fanboy and Chum Chum help him catch it.
S1 E14 • Fangboy
Fanboy suspects he's bitten by a vampire, and the boys go see a neck specialist who IS a vampire.
S1 E15 • Brain Drain
Fanboy gets amnesia, causing Chum Chum to become an open target for Yo.
S1 E16 • Fanboyfriend
S1 E17 • Chicken Pox
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.
S1 E18 • Moppy Dearest
S1 E19 • Norse-ing Around
Fanboy and Chum Chum meet a Viking named Thorvald, and try to get him back home to Valhala.
S1 E20 • The Janitor's Apprentice
When Fanboy and Chum Chum are punished for making a mess in the cafeteria, they have to help Janitor Poopatine clean up the school.
S1 E21 • Excuse Me
Fanboy, Chum Chum and Kyle get Kyle's Scrivener Elf to write fake excuse notes to get out of various classes.
S1 E22 • Night Morning
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.
S1 E23 • Marsha, Marsha, Marsha
The boys wind up in the wrong playground and are mistaken for preschoolers. While there, they encounter Marsha, Fanboy's archenemy.
S1 E24 • Secret Shopper
The boys learn to take care of business when a Secret Shopper comes to the Frosty Mart.
S1 E25 • Prank Master
S1 E26 • Little Glop of Horrors
S1 E27 • Total Recall
S1 E28 • Refill Madness
S1 E29 • The Frosty Bus
Fanboy and Chum Chum have a burping contest. When it's Fanboy's turn a song comes out, but it turned out to be The Frosty Bus. Everyone except for the boys ran up to it. Fanboy told Chum Chum to work up a thirst. So the ran around on the play ground as fast as they could and licked a fire hydrent. Then they couldn't decided what to get and then Lenny's shift was over so he went crazy saying "PINK, BLUE, PINK, BLUE, PINK, BLUE MAKE UP YOUR MIND!!!" (since Fanboy kept saying pink, blue, pink, blue.) So Boog came and missed their cups on purpose and tied the boys into a pretzel. Next Boog goes to play Chimp Chomp. the boys put their mouths to the pipes but Boog put helium in them. Then Fanboy dresses as a cop. Chum Chum had a siren that let him sound like anything. They tricked Boog but there was a call about a seagull stealing snacks. Then they brake Chimp Chomp on purpose. They told Boog to meet them behind to Frosty Bus in a hour. When he did they tricked him with a fake Chimp Chomp. Then they crash the Frosty Bus. And the sign crushes Boog.
S1 E30 • The Tell-Tale Toy
S1 E31 • Cold War
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.
S1 E32 • Fanboy in the Plastic Bubble
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.
S1 E33 • Sigmund the Sorcerer
S1 E34 • Fanboy A'Hoy!
S1 E35 • Fan vs. Wild
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!
S1 E36 • The Incredible Shrinking Fanboy
Fanboy worries that he's shrinking, and moves into Yo's dollhouse.
S1 E37 • Separation Anxiety
The boys' desks are separated for singing out loud during "Quiet Time", so they try to get reunited.
S1 E38 • Strings Attached
Fanboy is turned into a puppet and tries to prove himself worthy by doing a good deed, but it doesn't go well.
S1 E39 • The Book Report of the Dead
Fanboy swipes Kyle's spellbook to finish his book report, but ends up turning Mr. Mufflin into a zombie.
S1 E40 • Stan Arctica
Man-Arctica poses as a storeworker named Stan at Oz's when Fanboy and Chum Chum believe that he disappeared forever.
S1 E41 • Man-Arctica the Ride
Fanboy and Chum Chum are eager to ride a new roller coaster, but Fanboy's excitement later turns into fear.
S1 E42 • Fan-bidextrous
Fanboy trains himself to be ambidextrous in order to be a better class clown.
S1 E43 • Saving Private Chum Chum
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. Fanboy recruits his friends and they work together as a military rescue team to get Chum Chum back
S1 E44 • Jingle Fever
Lenny tries to ruin Fanboy and Chum Chum's chances of winning a million Frosty Bucks by stopping them from writing a jingle.
S1 E45 • Eyes on the Prize
The boys have no luck while searching for a cereal box toy that's in limited condition, so they seek help from Oz.
S1 E46 • Battle of the Stands
The boys start a lemonade stand, but Lupe and Yo start a competing one across the street.
S1 E47 • Lord of the Rings
Kyle tries to find out how Fanboy can connect two rings together.
S1 E48 • The Incredible Chulk
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.
S1 E49 • Norse Code
S1 E50 • The Great Bicycle Mystery
When Lenny's bike gets destroyed outside the Frosty Mart, Fanboy and Chum Chum try to determine who did it.