Jimmy, angry with his parents about grounding him for launching Carl off the roof, decides to run away. Judy wants to search for him, but Hugh says Jimmy'll be back in time for dinner. What neither of them knows is that Jimmy's not even on Earth anymore - he's in his new rocket, in space! Near Jupiter, his tiny ship is pulled into a huge Yolkian one. The Yolkians, thinking the Earth has launched their defenses against them, keep Jimmy and Goddard as prisoners. Inventions: Goddard, Strato XL, Jet Pack, VOX.
Since Jimmy's a scientist, he has more important things to do than pick up his pants - like invent a device that'll do that chore for him. But when the nanochip develops advanced brainial capacity, Jimmy's pants lead an attack on the city of Retroville! Inventions: MircoViewer 3000, Neutronic Eye in the Sky, Pant Eliminator, Smart Pants (nanochip), Laundroton, Neutron Catastrophic Simulation Escape System (Robo-Walker).
When the old tyrant of a hall monitor moves to Greece, Jimmy is chosen as his replacement. At first, he hates the job. But the power goes to his head, and he vows to "bring Lindbergh Elementary into the new century and beyond," becoming worse than the old hall monitor. Inventions: Hall Pass Authenticator, ID & Background Check Scanner.
Jimmy wants that new chemistry set in the worst way. But rather than wait for his birthday to come around, he hypnotizes his parents to think that tomorrow is his birthday. This plan works well - too well. Hugh and Judy think that every tomorrow is Jimmy's birthday, and our boy genius finds himself in trouble once again.
During Botany class, Miss Fowl accidentally swallows a seed from Jimmy's DNA-accelerated spinach plant. This has the unforeseen consequence of turning her into a 50-foot plant creature that threatens the citizens of Retroville. Inventions: ElectroMagnetic Radiation Multiplier, Hieroglyphics Translator, DNA Accelerator, Toaster Window Washer, Toaster Newspaper Deliverer, Toaster Make-Up Applier.
A bully has been giving Jimmy a rough time recently, and he's had it. Rather than go to the proper authorities, Jimmy creates an electronic bodyguard piloted by Nanobots. The Nanobots get a little overzealous, though, and the Jim-Tech doesn't help Jimmy's situation much. Inventions: the Jim-Tech & Nanobots.
Jimmy's new invention lets you actually be a player in your favorite video game! Sheen enters UltraLord Versus Robo-Fiend and is later joined by Jimmy. But when Carl enters in Llamapalooza, Jimmy's faced with the problem of getting them all back into the real world. Invention: Neutronic Game Pyramid.
Broadcast Blues: Jimmy lands the spot of host on Lindbergh Elementary's Public Access show! When the show fails miserably, Cindy and Libby are brought in as producer and co-star, changing informative Science With Jimmy to flashy Funky Jam Dance Party (with some science). Inventions: Gravitrax SK30, AccoustaVac.
The Yolkians have come to earth but this time they seek out only peace and brotherhood with the people of Retroville. But while they integrate themselves into society, Jimmy Neutron suspects the worst. Who could forget how the evil egg-shaped aliens tried to sacrifice the entire adult population of Retroville to the ravenous chicken god Poultra? Everyone apparently. Just when Jimmy is about to give in and make peace like everyone else, he discovers some evidence that reveals the Yolkian's true intentions. Inventions: Burp-Powered Jet Pack, Tungsten-lined Scan-ready DNA Regenerator, X-Ray Specs, Cheese Ray, Invisible Pills.
It's time for the Parent-Child Picnic Games at Lindbergh Elementary - and the Vortexes always win. Since Jimmy doesn't think Hugh has what it takes to beat Cindy and her mom, he invents a headband to scientifically bring his dad's performance levels up past human standards. Invention: "...corrective electromagnetic cranial band." (Hugh's headband)
Jimmy is hosting a sleepover with Carl and Sheen! To make it the best slumber party in history, Jimmy invents a machine to make perfect pillows for pillow fights, create made-to-order pizzas, and tell scream-your-head-off scary stories. But what happens if the invention is overloaded and the programs mix up? Invention: Slumbertron 9000.
The Father's Day talent show is only a few days away, and Jimmy has to perform with his Dad. Hugh can't wait for the big night. Jimmy, on the other hand, is afraid of being disgraced in front of the entire school. Sure he loves his dad, but why must Hugh be so dorky and un-cool? So Jimmy invents a device that will alter Hugh's personality, making him the coolest dad in Retroville. The invention's a success. Hugh is so cool he becomes a huge celebrity. But now this new-and-improved Hugh is too cool to spend time with his son. Jimmy must now come up with a last minute solution that will turn Hugh back into the dad he loves. Inventions: Neutronic De-dorkenator, mirco-fiber-optic tether net.
Bored by a class documentary on mummies, Jimmy decides to take Carl, Sheen, Libby, and Cindy along with him to see the real deal. But when his Electro-Life gizmo accidentally brings the mummies to life, Jimmy's got to keep himself and his friends from becoming the latest addition to Queen Hazabataslapya's Tomb. Invention: the Electro-Life.
Jimmy's Neutronic Monster-Maker transforms Sheen into a werewolf, Carl into a vampire, and Hugh into Frankenstein's monster. However, Jimmy's invention works too well, making those three real monsters! The little genius's Halloween is complicated when Carl and Sheen bite Cindy and Libby - now there are five monsters chasing him! Invention: Neutronic Monster-Maker.
Jimmy is convinced that Santa Claus does not exist. To prove his theory once and for all, Jimmy travels to the North Pole with Carl and Sheen. The boys find Santa's workshop, but Jimmy thinks it's just another toy factory. In fact, nothing they see convinces Jimmy otherwise. When his homing device accidentally emits a blast of energy to the source of the signal, Santa's atoms get scrambled. With Santa temporarily out of action, who can deliver the presents? Jimmy must now put his doubts aside, load up the hypercube, and try to save Christmas before the people of Retroville make up a new holiday. Inventions: Reindeer Scenario 8.20-B, Jingle Bell-Powered Sonic Propultion Unit, Laser-Guided Navigational Beacon (Goddard's red nose), Warp Module
Jimmy shows off his latest invention – a love pheromone – to Carl and Sheen. Anyone exposed to it will fall in love with the first person he or she sees. Jimmy thinks his potion is stored safely in the containment chamber, but Carl accidentally opens it – and love is literally in the air, exposing them all! And Cindy Vortex is the first girl Jimmy sees! Will Jimmy be able to reverse the effects of his latest invention, or will love conquer all? Inventions: Phermone Number 976/J
Send In The Clones When Jimmy's chores get in the way of him enjoying rare ice crystals from outer space, he hurriedly creates clones of himself. These clones, however, represent different parts of Jimmy's personality. What will happen when the clones are let loose in Retroville? Inventions: The six clones from Jimmy's Telepods - Positive Jimmy, Negative Jimmy, Romantic Jimmy, Funny Jimmy, Macho Jimmy, and Evil Jimmy
The Feud Jimmy and Carl's dads are fighting and forbid their sons from speaking to one another, so Jimmy and Carl must find a way to end the feud and save their friendship. Inventions: Holographic Star Toad (game), flashlight-like laser, Chloro-Plastic Crabgrass (Perpetual Motion Gyro-Top and Non-Sucking Hydraulic Loopy Straw).
Jimmy tries to impress Betty Quinlan by auditioning for the lead role in the school play, a musical entitled MacBeth in Space. Though he loses the part to Nick, he jumps at the chance of doing the special effects. However, when Nick breaks his leg skateboarding, will Jimmy rise to the challenge, or let the play go up in smoke? Inventions: Neutronic Storminator, Hovershoes, laser spear, robo space-walker.
Foul Bull During a class trip to a rodeo, Jimmy, Carl and Sheen fall for a cute cowgirl, Sally. To prove themselves worthy of Sally's heart, each of the boys set out to master a specific rodeo talent. Sheen turns himself into a rodeo clown, and Carl wrestles a pig, but it's Jimmy who comes out the victor with his impressive bull riding – and fool proof robotic bull, of course. Once the bull malfunctions however, the boys need the help of a real cowboy to save the day. That cowboy, or cowgirl, turns out to be none other than Miss Fowl. Invention: Hyper-dimentional Super-controlling Electro-Magnet, Bullinator 8000
Science Fair Affair Cindy leads a campaign to ban Jimmy from the school's science fair, citing unfair competition. But even an ousted Jimmy steals the spotlight when his patented oil-generating machine earns him a Nobel Prize for Science – then malfunctions and places everyone at the science fair in grave danger. Invention: The I Can't Believe It's Not Oil 8000
When Timmy Turner wishes he was in the greatest lab in the universe, he winds up in Jimmy Neutron's secret laboratory, and Jimmy is teleported to Dimmsdale. Jimmy happened to be giving Goddard an upgrade at the time, which Timmy interrupts, installing a violent video game into the dog's programming instead. Meanwhile, Jimmy inadvertently provides the means for Mr. Crocker to take over Fairy World. Invention: Jiffy Tuner, "Fudge-Head Suit" (as Cosmo called it).
To raise money for his inventions, Jimmy decides that he, Sheen, and Carl should get jobs. Skeet, employee of the month at McSpanky's, hires Sheen and Carl, but doesn't think Jimmy's the "McSpanky type," though he agrees to try Jimmy out. Jimmy, however, is not pleased with the brainless (and humiliating) work he has to do, so he takes it upon himself to show everyone what he's capable of - by bringing McSpanky's into the 21st century. Inventions: Hover Hats, Bee-Be-Gone, McSpanky's inprovements (including a tongue scanner and Customer Satisfaction).
The Mighty Wheezers When his parents go to the desert for a camp-out, Jimmy spends the weekend with the Wheezers. The aches, pains, and insane precautions the Wheezers take to protect their health, however, soon get to Jimmy. Thus, the boy genius sneaks back to his lab and creates health boost pills for the Wheezers. The pills work a little too well, though, and the Wheezers end up with almost super-human abilities! But the effects are only temporary, and they could wear off at any time.... Invention: total health-boost pills.
Billion Dollar Boy After Jimmy beats the richest kid in Retroville, Eustace Strych, in the Battlekite Flyoffs, Eustace's pride is wounded. He sets up a trap for Jimmy by inviting Jimmy, Sheen, Carl, Cindy, Libby, Hugh, and - most importantly - Goddard over to his mansion. There, Hugh befriends Eustace's dad while the kids enjoy an ice cream banquet. Things turn dangerous, however, when Eustace engages Jimmy in a bet - Goddard against one of Eustace's RA mul
A strange meteor lands in Retroville, bearing a mysterious message in an alien language. When Jimmy is finally able to translate and answer the riddle, he, Cindy, Libby, Sheen, Carl, Bolbi, and Goddard are sucked into space - only to find that the message is an invitation to Intergalactic Showdown! Team Earth must learn to work together to win - or lose their home planet! Invention: Wormhole Generator
After a close call with a hostile alien life form on the comet Twonkus-3, Jimmy returns home only to find that a cute and cuddly alien has stowed away on his ship. Despite Jimmy's warnings about the dangers of keeping alien pets, the twonkies become huge hits, and soon everyone owns one. But when the twonkies undergo an unexpected mutation, they threaten to take over Retroville! Invention: Remote-powered mini comet.
The gang enters a script-writing competition, where the winning script will get turned into a movie! The director, Quentin Smithee, chooses Jimmy, Cindy, Libby, Sheen, and Carl (much to Hugh's disappointment) to star in Jimmy's movie, which will be shot entirely in Retroville. During the filming, however, dangerous on-set "accidents" start to happen, and the rest of the kids start to doubt starry-eyed Jimmy and inexperienced Smithee.
An encounter with the Van Patten radiation belt causes strange mutations in the kids: Jimmy glows orange, Cindy is super strong, Sheen is super fast, Libby can become invisible, and Carl has sonic burps. As the N Men, they work to fight evil in Retroville, but they end up doing more harm than good. The military soon steps in, capturing four of the kids, but only laughing at Jimmy's orange hue. When Jimmy discovers the dark side to his friends' new powers, he must race against time to find a cure - and deal with the effects of his power.
Jimmy becomes frustrated at school when his scientific lecture is disregarded in favor of making macaroni sculptures. So, when Dean Cain, head of Pamona University, offers him a chance to enroll in that college to help them win a science grant, Jimmy eagerly accepts. He soon finds, however, that college is a completely different world from elementary school ... a much more challenging one. And when it comes to jealousy of Jimmy's knowledge, Cindy (left behind at Lindbergh Elementary) doesn't hold a candle to new classmate Seymour.
King Goobot has gathered together a collection of Jimmy's previous adversaries, including Professor Finbarr Calamitous, Beautiful Gorgeous, Jimmy's evil-genius baby cousin Eddie, the Junkman, Eustace Strytch, Grandma Taters and the Space Bandits (Zix, Travoltron, and Tee). The mission of this League of Villains? Get Jimmy Neutron. Inventions: The Essence of N-Men, The Gravitational Wormhole Generator, "Negative Ions".
Jimmy and Timmy fight over who get's to take Cindy to the Friday the 13th Dance. But, when Professor Calamitous follows Jimmy to the FOP universe, Anti-Cosmo gets him to help his anti-fairy friends escape their prison (which cannot be penetrated by anyone from their universe). Now, the anti-faires plan to halt the Earth's rotation to make it Friday the 13th forever. But the problems had just begun. In an effort to impress Cindy, Timmy uses AJ's Gene Splicing Ray Gun and fuses Jorgen von Strangle and Calamitous together. With Jorgen's powers at his command, Calamitous can finally take over the world and do away with both Jimmy Neutron and Timmy Turner once and for all! Inventions: Portal, freeze ray, net attachment for hyper-cube, sound wave detector.
Evil Jimmy returns! Jimmy needs his evil clone to "be" him so he can up his invention output by staying in his lab while the clone goes to school and spends time with his friends and family, so he tries to make the clone a "Good Jimmy." Of course, things go wrong and Evil Jimmy wreaks havoc around town....