List of The Adventures of Jimmy Neutron, Boy Genius episodes facts for kids

Jimmy (voiced by Debi Derryberry) runs away after his parents ground him for launching Carl (voiced by Rob Paulsen) off the roof, but soon discovers King Goobot and his sidekick, Ooblar, trying to take over the world. While Hugh and Judy Neutron are talking about Jimmy returning home, Jimmy thwarts the Yolkians' plot, and returns home. The episode ends with Carl coming into the house and asking if he can use their toilet.

Jimmy and his friends must rescue the parents after they are kidnapped and abducted by the Yolkians.

After being punished by Judy for not picking up his pants, Jimmy invents a chip that'll make his pants put themselves away so his punishment will be lifted. But after a malfunction, Jimmy's pants, along with Carl's pants, Sheen's pants and Cindy's pants, start to walk on their own and plan to take over the world.

Jimmy becomes a normal boy because his classmates are angered of how smart he is. However, his brain-draining invention glitches and instead causes him to become unintelligent and goofy, just when a meteorite is about to hit Earth. Jimmy's friends try to get him back to his genius self before the meteorite destroys Earth.

Jimmy invents an android salesman, the Willy Loman 3000, in order to win a candy-selling contest against Cindy. However his invention backfires when it starts selling anything and everything it can find, including Jimmy's stuff.

When his friends are too busy to help him or hang out, Jimmy invents a little brother robot who soon becomes annoying.

Wanting to prove Cindy wrong, Jimmy brings Thomas Edison to the present, but is unable to take him back when Edison falls for Ms. Fowl.

When Granny Neutron comes over while his parents are away, Jimmy creates a medicine that accidentally turns her into a baby and must look after her, with the help of Cindy, while simultaneously working on an antidote so he can change her back to normal before his parents return home.

The Neutrons get rich after Jimmy goes back in time to convince his dad to invest in McSpanky's burger restaurant.

Jimmy, Carl, Sheen, and Cindy go underwater in a submarine to look for a treasure after Ms. Fowl makes Jimmy and Cindy partners for their project.

Carl is having problems due to his nightmares and convinces Jimmy to go inside his dream to see what happens that makes him so scared.

Jimmy freezes Retroville on a hot day, sending the town into a second ice age. He later must find a way to melt the large amounts of snow and ice.

Jimmy, Carl, and Sheen form a rock band so they can beat Cindy and Libby in the school talent show, but their egos soon get out of control.

Wanting to beat Cindy in a relay race at their elementary school, Jimmy invents super shoes that make him run faster than anyone else. After Cindy tricks him into losing a sure-win at the race, Jimmy, seeking revenge, takes advantage of his shoes' invisibility effect to play pranks on the students, leading to trouble when he ends up stuck in fast running mode.

Publicly humiliated by Cindy yet again, Jimmy comes up with an invention that will allow him to read her brain. But due to an unexpected power-surge, Jimmy and Cindy's brains swap bodies.

For his history report, Nick tells an urban legend about a child-eating phantom that haunts the town's amusement park, Retroland. Jimmy is skeptical, claiming it a hoax. Nick dares Jimmy to go there at midnight to see for himself. Jimmy accepts, recruiting Carl and Sheen to accompany him.

Jimmy's atoms accidentally get switched with Carl's hamster so he ends up with the body of a hamster, and the hamster with his body. Meanwhile, Hugh (unaware of the mishap) takes the hamster out for father-son bonding time.

Jimmy becomes hall monitor, but takes it too far when he goes mad and abuses its power.

Jimmy uses his Hypno-beam to hypnotize his parents into thinking it's his birthday the next day. The hypnotism doesn't wear off and so his parents believe his birthday is every day.

Jimmy invents a candy that everyone becomes addicted to, and the citizens of Retroville become enraged when he refuses to give them more of it.

Jimmy brings a plant to school that accidentally turns Mrs. Fowl into a 50-foot tall, Godzilla-like creature.

A bully at school has been giving Jimmy a rough time and stealing his lunch so Jimmy creates an electronic bodyguard piloted by Nanobots. Unfortunately, the Nanobots get a little overzealous and start to mistake his friends for bullies and his friends become petrified of him.

Sheen is horrified to find one of his Ultra Lord action figures has gone missing and asks Jimmy to help. It is up to Jimmy to be the Sherlock Holmes of Retroville and find the action figure.

Jimmy invents a sick patch that is guaranteed to get the wearer out of having to attend school. It, unfortunately, ends up making everyone sick, so Jimmy and Sheen go travel inside of Carl's stomach to fight his germs and create a vaccine.

Jimmy, Carl, and Sheen are camping with Hugh, who is allowing no technology whatsoever, but they run into a bear.

Carl and Sheen convince Jimmy to throw a party while his parents are out.

Using Jimmy's newest invention, Sheen travels inside his favorite video game to meet his hero, Ultra Lord. But when he ends up losing on level one, Jimmy enters the video game to help him. Carl, not realizing that Sheen and Jimmy are really in the video game, puts them on a difficult level.

Jimmy creates his own science TV show, which Cindy, Libby, and Brittany's dance show competes with.

Professor Finbarr Calamitous, who can never finish anything, plots to take over Retroville, with some help from its resident boy genius. He steals Goddard and holds him for ransom in order to lure Jimmy into his trap.

Jimmy's alien enemies, the Yolkians from the theatrical film, are back and pretend to be nice, but Jimmy suspects something is up. The town turns against him when he tries to convince everyone not to trust them. At the same time, the Yolkians trick Cindy into helping them in their evil plan to resurrect Poultra.

Jimmy invents a sweatband to help his dad perform better at the parent-child games to beat Cindy and her mom (which is her Aunt in disguise), only to get disqualified for cheating.

Jimmy invents a new sleepover machine when Carl and Sheen come over for the night. Things take a scary twist, however, when Carl accidentally creates a pizza monster from tampering with the machine for more pizza.

After being embarrassed by Hugh at rehearsals for the Father's Day talent show, Jimmy uses an invention that changes Hugh from weird to cool. Unfortunately, the more famous Hugh becomes, the less time he spends with Jimmy and the more Jimmy begins to miss the old Hugh.

Jimmy, Carl, Sheen, Cindy, and Libby search for rare diamonds on an asteroid, but become extremely greedy very soon after. Things get worse when aliens on the same asteroid plan to vaporize them.

Jimmy has invented a Time Replay Remote, which he uses as part of a prank pulled on Cindy and Libby. However, Hugh sees the invention and, in borrowing it to see how it works very well, accidentally sends Jimmy, Carl and Sheen back 200 million years. Now, the boys must work to avoid the prehistoric dinosaurs and get back to the present. Meanwhile, Hugh begins experimenting himself going forward and reverse in time with the Remote, thus annoying the people of Retroville.

Feeling bored over a documentary of mummies at school, Jimmy takes Carl, Sheen, Cindy, and Libby on an adventurous trip to Egypt to find the ruins of the lost tomb of Queen Hazabataslapya, only to discover she's actually Libby's ancestor.

Jimmy's determination to captain a winning baseball team leads him to rev up the equipment with Neutronic technology.

Jimmy, Carl, and Sheen attempt to turn themselves to be 18 years old in order to buy an M-rated video game. But due to a malfunction, they turn into senior citizens and they have to get back to their original ages before they turn to dust.

Jimmy is recruited by a top-secret government agency to become a spy, but what's even more thrilling is joining forces with his favorite action-hero movie star, Jet Fusion, in an effort to save the world from the villainous Professor Finbarr Calamitous and his daughter, Beautiful Gorgeous.

Jimmy creates a device that turns his friends into actual horror film monsters for Halloween costumes.

A rumor spreads that a lake monster is terrorizing Retroville, but Jimmy decides to prove that it doesn’t exist.

Jimmy runs for class president against Libby, Sheen and foreign exchange student Bolbi, and Carl ends up being forced by each of them to vote for them.

The Nanobots escape from Jimmy's lab and wreak havoc by "deleting" the citizens of Retroville and trapping them in a virtual trash bin.

Jimmy is determined to prove that Santa Claus doesn't exist, and in doing so puts the future of Christmas in jeopardy.

Jimmy creates a love potion for his friends that makes them fall in love with the first person they see: Jimmy falls for Cindy, - Carl for Jimmy's Mom - Judy, - and Sheen for Libby.

After Sheen fails a history test, Jimmy increases Sheen's brain to be larger and smarter. However, Sheen becomes evil and angry with power with his new supreme mental abilities, and proclaims himself king. Jimmy and Carl must stop Sheen from taking over Retroville and the entire planet.

Feeling tensed and unappreciated around the house, Judy takes a week off at a spa, leading to Jimmy inventing a replacement robo-mother. Things go awry when the robo-mother thinks she's actually Judy and causes trouble around the house.

To avoid his chores, Jimmy makes clones of himself, including an optimist, a pessimist, a tough-talker, a French romantic, a comedian, and an evildoer. However, the clones cause trouble in Retroville rather than doing his chores, with the real Jimmy taking the blame.

Jimmy, Carl, Sheen, Cindy and Libby infiltrate a museum in order to retrieve a precious egg which belongs to a princess.

Jimmy and Carl are forbidden to hang out with each other as their fathers are fighting over Hugh's missing lawn lopper.

Jimmy joins his school play, "MacBeth in Space" to spend more time with his crush, Betty Quinlan. However, he only makes the special effects for the show and Nick is assigned the lead role. When Nick hurts himself skateboarding, Jimmy rushes to save the play and takes Nick's place as the lead role.

Brobot lures Jimmy, Carl and Sheen to the moon by faking being in danger. After the boys return to Earth, Brobot tells Jimmy that an alien called the Junkman captured his parents, but Jimmy doesn't believe him. Eventually, Jimmy, Carl and Sheen are also captured by the Junkman.

Miss Fowl takes her students on a trip to a rodeo, where Jimmy, Carl and Sheen fall for a cowgirl named Sally. Wanting to impress her, the boys become rodeo stars.

Jimmy is banned from the school science fair after Cindy convinces Principal Willoughby that he is too smart to compete.

Jimmy's newest invention requires pure gold, but when the gold for his invention is destroyed, Jimmy, Carl, and Sheen get jobs at McSpanky's burger factory. Management's unfair treatment of Jimmy drives him to revamp the whole restaurant by making it automatic and hygienic.

Jimmy's parents are on vacation for the week and Jimmy is left with Carl's family. Jimmy gives them a pill which makes them super strong and go out to have fun.

Jimmy meets and beats the richest kid in Retroville, Eustace Strych, in the Battlekite Flyoffs. Having had his pride wounded, Eustace invites Jimmy and his friends over to his mansion, with evil intentions.

After the town of Retroville receives a space rock with a message on it, Jimmy is determined to decode the message. After he figures out the message, which is sort of a riddle, Jimmy, and his friends are kidnapped into outer space where they're forced to compete in an intergalactic game show, hosted by Meldar Prime (voiced by Tim Allen), in which the losers get their home planets destroyed. With the help of one of the competitors, which is an alien female warrior named April (voiced by Alyssa Milano), they plan to win the competition, not only to save the Earth, but other planets as well.

Jimmy visits a comet, and while harvesting dust from the comet's surface accidentally brings a small fluffy alien life-form back to Earth. Carl brings the alien, which he calls a "Twonkie", to class, and it produces multiple off-springs. Everyone finds the Twonkies irresistibly adorable and adopts one. However, when the Twonkies hear music they morph into grotesque and vicious monsters. Jimmy and the citizens of Retroville must stop and capture the dangerous rampaging Twonkies and send them back to their comet before it leaves Earth's orbit.

Note: This one-hour episode has a special theme in the beginning.

While returning from a space voyage, Jimmy and his friends get zapped by the Van Pattern Radiation Belt and gain superpowers. Cindy gains super-strength, Sheen gains super-speed, Libby gains invisibility, and Carl can produce sonic belches. Jimmy simply turns orange and seems to lack powers entirely, resulting in his friends and the townspeople mocking him. However, when Jimmy loses control of his temper due to Cindy's relentless insults, he turns into an orange Hulk-like monster and begins on a rampage in Retroville by causing havoc. His friends must figure how to reverse his hulking transformation so he can save them and himself from radiation poisoning.

Jimmy, Carl, Sheen, Cindy, and Libby join a movie cast with a demanding director named Quentin Smithee, Professor Calamitous in disguise, who is plotting to do away with Jimmy and his friends, and when Hugh is hired as "Donut Boy", he simply doesn't get the point that he won't be in the film.

After losing his job, in order to stay in Retroville, Hugh makes a fortune creating a brand of toys that Jimmy secretly modifies in his lab before his father presents the prototypes to the toy company. However, Hugh takes the Nanobots after mistaking them for batteries and using them for one of his toys. Once inside the toy, the Nanobots plot to destroy Retroville.

After an argument between Jimmy and Cindy about the equator, the gang travels in Jimmy's hover car over there. Jimmy and Cindy fall out of the hover car and into the water while arguing and become stranded on a deserted island, where they seem to develop feelings for each other without the stress of their everyday lives in the way. Carl, Sheen, and Libby try to turn off the auto-pilot and find their friends somewhere in the water.

Jimmy's grades are so great that he is allowed to skip original school and go directly to college. But Jimmy becomes the unwitting target of another student named Seymour Nimmelfarb who is jealous of Jimmy's intelligence and wants to get rid of him and get him expelled.

After traveling into the future, Jimmy, Carl and Sheen find out Libby is the future dictator of the world after Libby sprays Jimmy's new chemical that makes any living thing it touches angry with her power.

King Goobot is back again, and recruits every villain Jimmy has ever defeated to be part of his new army to get revenge on him.

Note: In production order, this is the series finale.

Carl gets infected by a "face-hugging" alien parasite, and becomes pregnant with an electric space jellyfish baby.

Jimmy and his parents go to celebrate their great Aunt Amanda's birthday. Apparently, someone is trying to destroy the family and Jimmy is blamed for destroying the stuff at the party. As it turns out, Baby Eddie is the one trying to ruin the party for Aunt Amanda's money and Jimmy must prove his innocence and have his name cleared for something that he didn't do to save the reunion with the help of his friends, Carl and Sheen and his uncle and Hugh's twin-brother, Cousin Gomer.

Jimmy tries to stop Jet Fusion from marrying a criminal, Beautiful Gorgeous, the daughter of Professor Calamitous.

Libby is kidnapped by Yoo Yee, a Kung-Fu warrior who wants Sheen's position as the Chosen One, and Sheen must learn kung fu to save Libby.

Jimmy accidentally shrinks the whole town of Retroville. And the Space Bandits capture the citizens and try to sell them as toys to alien children.

When a show called "The Happy Show Show", hosted by Grandma Taters, hypnotizes everyone in Retroville, Jimmy and Cindy must stop her before the whole world becomes happy, mindless zombies.

Jimmy buys a magic kit and puts on a show to impress Betty Quinlan. Jealous, Cindy tampers with the machine, which causes Jimmy, Carl, Sheen, Cindy and Betty to be sucked into multi-dimensional space.

Jimmy tracks down his evil clone once again and attempts to turn him good, but the clone has other ideas. Evil Jimmy creates a dark matter chip, producing a corrupted clone of Earth; the real Earth and everyone living on it are at risk of fading into oblivion. Jimmy must stop his evil clone's plan before it is too late.

Jimmy, Carl, and Sheen are trapped in Dr. Moist's lair, who captures innocent tourists and turns them into Algae Men by inviting them to eat food with him. When they eat the green algae seeds, they turn green and into Algae Men, which explains the mysterious disappearances in the Bahama Quadrangle.

Carl wants to impress a girl by pretending to be a genius, and making Jimmy seem unintelligent in comparison to him.

Jimmy is arrested for his crimes he didn't commit and goes to prison along with Carl and Sheen and Jimmy must clear his name for something that he didn't do with the help of a local hillbilly.

Worried that his dad can embarrass him at school, Jimmy installs a chip in Hugh's ventriloquist dummy that makes him tell good jokes. But when Flippy the dummy begins to malevolently possess Hugh and drain his brain, Jimmy must save his dad and change Flippy back to normal.

When Jimmy sends the teachers into Hyperspace for a week and the whole school gets the place to themselves, things get a lot worse. Jimmy, Carl and Sheen's parents are substitutes, and they embarrass them. Jimmy tries to build a raging hormone bottle to rebel against the parents, but the parents drink it instead and run amok through the school.

The kids become anchors for a kids news program. When Libby starts abusing her gossip segment, her friends must plot to stop her from invading the privacy of the rest of the town.

Eustace returns, and he's still determined to humiliatingly defeat Jimmy by racing to find an hidden energy source on Mars.

After he is worried that his son loves Ultra Lord more than him, Sheen's dad begs Jimmy to turn him into a superhero to impress his son.

Jimmy enters Goddard in a pet contest, and because he's a machine rather than an organic flesh and blood dog, he gets disqualified. Feeling humiliated and sorry, Goddard runs away from home. Now Jimmy, Carl, and Sheen try to find him.

Note: In airing order, this is the series finale.

Jimmy Neutron and Timmy Turner end up in each other's worlds and must work together with the other's group of friends to return things back to normal.

Jimmy and Timmy fight over Cindy, while also attempting to save Dimmsdale from the Anti-Fairies and Retroville from Professor Calamitous. For the time, Jimmy's friends end up in Dimmsdale instead of just Jimmy, and Timmy's fairies end up in Retroville instead of just Timmy.

Jimmy and Timmy join forces to save both of their universes from getting destroyed by an evil monster of their own creation.