In "Deedeemensional", Dee Dee time-travels to save Dexter from a monster. In "Magmanamus", Monkey goes up against a lava being that dislikes human-caused noise. In "Maternal Combat", when his mother falls, Dexter creates a robot mom to substitute for her.

Monkey must defend the city from a giant underground lava monster, Magmanamus, who cannot sleep because of the noise created by its residents.

When his mother falls ill, Dexter creates a robot to do her chores. Dee Dee gets hold of its remote control and wreaks havoc, forcing Dexter to create a second robot to counter Dee Dee's.

Dexter is forced to play dodgeball by his P. E. teacher. Constantly failing, Dexter builds a robotic exoskeleton to defend himself.

Intergalactic wrestling champion Rasslor challenges Earth's superheroes, including Monkey, with the planet's fate at stake.

In need of an assistant to operate his latest invention, Dexter performs a brain transplant on Dee Dee to make her smart enough to fulfill the role. With her new brain, Dee Dee proves to be more intelligent than Dexter.

Mandark Astronomanov, a new student at Dexter's school, seems to be superior to Dexter academically. Mandark forces Dexter to shut down his lab so that Mandark's lab can gain more power. However, with the help of Dee Dee, Dexter manages to destroy Mandark's lab.

Monkey encounters Simion, an intelligent anthropomorphic chimpanzee who seeks vengeance on humans for turning him into his current state.

Banned from watching a late-night movie due to his young age, Dexter uses his technology to artificially grow into adulthood, but Dee Dee tampers with his machine, causing Dexter to turn into an old man.

Dee Dee and her friends, Lee Lee and Mee Mee, enter Dexter's lab and wreak havoc. Dexter clones himself to stop them, but the girls too make clones of themselves.

Monkey's birthday party is interrupted by Barbequor an intergalactic villain who plans to eat the planets, and his sidekick, the Silver Spooner.

Rerun of "Dexter's Laboratory", the first "What a Cartoon!" pilot.

To clone a dinosaur with an incomplete DNA sequence, Dexter uses his dog's genetic code to fill in the gaps.

While on a date with Agent Honeydew, Monkey gets hypnotized by the music of the Organ Grindor who commands him to rob Fort Knox.

Due to overworking his brain, Dexter's mind shuts down, making him act idiotic.

After Dee Dee steals his critical invention, Dexter ventures into her room to find it.

Monkey encounters an alien hunter named Huntor and must fight him to save Agent Honeydew and Commander Chief.

Rerun of the second "What a Cartoon!" pilot.

Dexter and Dee Dee enter tryouts to become Major Glory's sidekick. When Dee Dee wins, Dexter realizes that fancy costumes are not the only criterion to become a superhero.

With only one television in their apartment, Major Glory, Krunk, and Valhallen disagree on what to watch: Major Glory's televised capture of the Disgruntled Postman, TV Puppet Pals, or the monster truck pull.

Dexter and Dee Dee's father buys a video game for them to play, but the game sucks Dexter inside when he plugs in the cartridge, and it is up to Dee Dee to bring him out.

Valhallen loses his magic ax and starts turning into a nerd, forcing Major Glory and Krunk to enter his room to find it.

When Dexter's nightmares become frequent and problematic, he invents a machine that allows him to have nice dreams, as long as Dee Dee can operate it properly while she is awake.

While fighting Comrade Red and his gang, Krunk falls in love with his equivalent in their gang, She-Thing.

Dexter's new device allows him to study for the next day's French test while sleeping. It malfunctions, causing a single phrase -omelette du fromage- to repeat throughout the night, causing Dexter to wake up the next morning speaking nothing else except "omelette du fromage".

Dee Dee teaches Dexter how to live life her way instead of being lonely and purely focused on science.

Major Glory forces Krunk and Valhallen to tidy up their apartment for his Uncle Sam, who is coming over for a visit.

To learn more about girls, Dexter camouflages himself and enters Dee Dee's room, where she is having a sleepover with her friends Lee Lee and Mee Mee. He gets caught by the girls, who force him to take part in their activities.

To prevent himself from being taken away by aliens for experimentation, Dexter tricks Dee Dee into going instead, but he regrets his decision after realizing how much he cares for her.

To fix their apartment's plumbing, Krunk and Valhallen go to the basement, where they meet Ratman, a diminutive vigilante raised by rats (a parody of Batman).

Dexter's lab is threatened with repossession unless he can repay his debt to NASA. When Dee Dee wins the same amount in a lottery, he decides to steal her money out of desperation.

Major Glory, Krunk, and Valhallen try to rid their apartment of a bee.

Following the destruction of his lab by Dexter and Dee Dee (in the episode Dexter's Rival), Mandark turns to magic to beat Dexter at the science fair.

Dee Dee inflates Dexter's hydro-plasmatic suit and constantly floats in the air, prompting Dexter to bring her down.

After fellow Justice Friend White Tiger helps Valhallen stop a super-villain, the latter invites him to spend the night in his apartment, forgetting that Major Glory is allergic to cats.

Not interested in hearing Dee Dee's long-winded story, Dexter gives her a silencing formula to keep her quiet, but it instead turns her into a giant monster still bent on telling her story. When he realizes that nothing can make her quiet, he becomes a giant monster himself.

After a fright from Dee Dee, Dexter lays down in the beard growing machine and tries to grow a beard like his hero, Action Hank. Unfortunately, everyone thinks he's a hero.

Mandark doesn't know that his pet duck is really Quackor the Fowl, Monkey's rival. Quackor overhears Mandark talking in his sleep about destroying Dexter's lab and tries to do it, unaware that Monkey is Dexter's pet.

Dexter prevents Dee Dee from destroying some ants. In order to teach her about ants, Dexter and Dee enter Dexter's ant farm. The ants think Dexter is a criminal and has him fight to the death with a stronger ant.

When Dexter's friends tire of the complicated traps he sets up as Dungeon Master (he has their character's killed every time), they put Dee Dee in charge for a change of pace.

Dexter's father gets challenged to an arm wrestling match against a local champion at a truck stop, when he causes the champion to lose for the first time, but refuses to do so even when he trashes the family car. He finally accepts the challenge when he slams the door in Mom's face. Dee Dee knows he'll get creamed, so Dexter builds him a robotic arm to help him win the match.

Dee Dee Locks and the Ness Monster—Dexter's mother forces Dexter to read to Dee Dee when she's sick, but she makes up her own story after being bored by Dexter's story (which was actually a science article). The story is completely mixed up and makes no sense. Dexter ends up catching Dee Dee's illness.

Dee Dee's new dance annoys Dexter to no end.

Dexter ends up in the "old part of the lab" where his earliest inventions, long since forgotten, are not too happy to see him. They are mad at him for saying they were his greatest inventions, then moved on to another great invention.

When Dee Dee refuses to flush their gold fish down the toilet, the ghost of the fish haunts them.

Dee Dee and Dexter win a free pass to Professor Hawk's magic factory after finding the golden diskette.

Dad encourages Dexter to become the king of snow, as he was in his early days, until someone beated him.

In a whole parody of ""Speed Racer"", Dexter and Mandark compete on a race.

Everybody except Dexter gets sick, so he makes himself a plastic bubble to get germ protection.

Dexter must go to the back of the school bus to retrieve his pencil, where another kid got lost years ago.

Krunk stays awake all night watching The Puppet Pals Show Marathon, so his brain starts playing him tricks.

Dexter is sent to summer camp, in a place far away from civilization.

While the family is at the woods, Dexter goes searching for the Mighty Bigfoot, if Dee Dee doesn't find him first.

Dexter must stop Dee Dee from showing some pictures (that she took earlier in Dexter's lab) to Mom.

To avoid the bath, Dexter decides to laminate himself.

Dexter and Dee Dee get their Action Hank and Pony Puff Secret Codes mixed up.

Dexter and Dee Dee go to South America in order to find the chupacabras, an animal that Dexter created.

Dee Dee, who's not exactly good at singing, gets Dexter's help on getting a better voice, but not the voice Dexter was expecting.

When Dexter's favorite show gets interrupted by an emergency, he searches all town trying to find it and solve so regular broadcast returns.

Dexter and Dee Dee get trapped with a Finger trap.

Dexter and Dee Dee must stop Dad from eating Mom's muffins.

Dexter finds out he's ugly, so he transforms his face to look better for the school photo.

Dexter combines himself with bubble gum to become more stretchable.

Dexter and Dee Dee want to become older, but instead they make everyone else a baby.

A new female villian named Peltra wants Monkey's Coat.

Dad wants to show Dexter the joy of sports.

Koosy tells Dee Dee that he is the king of the land of Koos, but when Dee Dee goes there...

Surprised of the results coffee causes on Mom and Dad, Dexter and Dee Dee decide to try it themselves.

After Dexter did something really bad at school, he gets her mother called, so to not ruin his reputation, he turns Dee Dee into Mom.

After Dexter gets bitten by a clown, he turns into one every night.

On his way home, Dexter gets followed by a labrador, when he teaches him to speak, the dog becomes even more annoying.

Dexter and Mandark mechanize the giant figures of Lincoln and Washington from the Mount Rushmore statues and wreak havoc with them.

After Dexter returns a bunny to a little girl with big round eyes, she starts following Dexter everywhere.

After Dexter ""fires"" Dee Dee, he realizes that his lab needs chaos.

Dexter travels to the past to meet the caveman that discovered fire.

Dexter worked all night on his inventions so all he wants is some sleep, but Dee Dee will make sure that that doesn't happen.

After Dexter breaks his glasses, he starts a new fashion at school.

Dexter goes to the appliance store to buy a lightbulb for his lab.

Dee Dee keeps getting into Dexter's lab even though Dexter keeps throwing her out.

Mandark tries to impress Dee Dee by getting into a surfing contest.

Dexter makes Dee Dee a robot for herself, at the same time a volcano is going to burst on an island in the middle of the ocean.

Dexter must save his family after they get possesed by aliens.

Dee Dee must save Dexter who is a slave in a distant galaxy.

Dee Dee and Lalavava (Mandark's sister), compete on a ballet contest.

It's Mother's Day and Mom can't take that Dad, Dee Dee and Dexter do all the housework.

Dexter stays at school too much, forcing the janitor to stay as well, so he waits for a day in which Dexter has to leave early for an emergency, as he plans his revenge...

Dexter must stop his mechanical parrot before his imitations reveal the secret of his lab.

Krunk gets a nacho stuck in his tooth and Mayor Glory wants to take it out himself while Valhallens insists on taking Krunk to the dentist.

Dexter must prove to Dee Dee that Santa Claus doesn't exist.

When Blue Falcon appears with a destroyed Dynomutt, Dexter decides to build a new one.

The story of how Dexter was born and how he built his lab, in the style of a musical.

Dexter must save Japan from being destroyed by a monster, but his robot must be controlled by four people to function correctly, so Dexter must tell Dee Dee... and his parents.

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When Dee Dee sees an Ostrage at the Zoo, she wants one of her own as a pet.