Jimmy runs away after his parents ground him for launching Carl off the roof. Little do his folks know that Jimmy has been abducted by aliens, who think he knows about earth's defense systems.

Warum, zum Kuckuck, können Hosen eigentlich nicht selber gehen? Das fragt sich kein Geringerer als Superhirn Jimmy Neutron. Nach einigem Tüfteln hat der Mini-Einstein einen „Chip“ entwickelt, der seine Hosen selbständig macht. Jetzt tragen sie ihn. Doch es dauert nicht lange, da bahnt sich eine Hosen-Revolte an, und eine ganze Armee von cleveren Beinkleidern bedroht die Stadt Retroville. Was tun?

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Clever sein ist ganz schön anstrengend. Deswegen entwickelt Jimmy ein Gerät, das in der Lage ist, seine Intelligenz zu reduzieren. Und Jimmy wäre nicht Jimmy, wenn seine neueste Erfindung nicht auch funktionierte. Der neue Jimmy ist ein ganz normaler Junge, etwas einfach gestrickt, aber glücklich. Doch wer soll Retroville retten, als plötzlich ein riesiger Komet auf die Stadt zurast?

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Boredom causes Jimmy to create an overly energetic robot for a little brother/ After bringing Thomas Edison to the present, history rewrites itself by vanquishing all electrical machinery.

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Jimmy turns his babysitting Grandma into a toddler to avoid her elderly rants and rambles/ Jimmy goes back in time to convince his dad to invest in a successful fast food chain, making the family rich in the present.

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Jimmy and his friends use a sub to find treasure hidden in an old, sunken ship somewhere on the ocean floor/Carl confronts his nightmares of the "terrible spooky thing" by allowing Jimmy to enter his dreams.

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Jimmy attacks the earth's atmosphere with sun block to end Retroville's heatwave causing a second ice age instead. / Jimmy creates musical instruments that play based on thought waves to beat Cindy and Libby in a school talent show.

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After consistently finishing last in his gym class races, Jimmy invents a pair of super fast running shoes until things get out of control/ Jimmy's new experiment goes horribly wrong causing him to switch bodies with Cindy.

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A dare leads Jimmy and pals to stay over night at Retroland to prove once and fall all the existence of the park's phantom/ Not to dissimilar to 1958's 'The Fly', an accident rearranges the bodies and heads of Jimmy and Carl's pet hamster.

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When the old tyrant of a hall monster leaves, Jimmy is picked as his replacement. /In order to get his new chemistry set right away, Jimmy hypnotizes his parents.

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Jimmy comes up with a snack that is even tastier than everyone's favorite./Miss Fowl swallows a seed from Jimmy's DNA-accelerated spinach plant turning her into a 50-foot plant creature.

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Jimmy creates an electronic bodyguard to protect him from a bully./Jimmy helps Sheen find his missing Ultra-Lord action figure.

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Jimmy creates a "get out of school sick" patch. / Hugh takes Jimmy, Carl and Sheen camping in the wild.

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When Hugh and Judy go out for the evening, Jimmy throws a party. / Jimmy uses his Neutronic Game Pyramid to send Sheen into his favorite Ultra Lord video game.

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Principal Pinkly makes Cindy the producer of Jimmy's public-access TV show. /The mad Professor Finbarr Calamitous schemes to make Jimmy his "scientific slave."

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The Yolkians have come to earth, but this time they seek out only peace and brotherhood with the people of Retroville. While Jimmy Neutron suspects the worst, everyone in town is ready to forgive and forget.

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Jimmy's newest invention lets Sheen actually be a player in his favorite video game! He enters UltraLord Versus Robo-Fiend and is later joined by Jimmy. But when Carl enters in Llamapalooza, Jimmy's faced with the real problem of getting them all back into the real world. Invention: Neutronic Game Pyramid.

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The Father's Day talent show is a few days away so Jimmy invents a device that turns dorky Hugh into the coolest dad in Retroville.

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When a mysterious meteor encrusted with precious gems plummets to earth, Jimmy and company decide to head into space to mine the priceless asterubies.

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Jimmy invents the Quantum Replay 9000 which enables him to go back in time. Hugh accidentally sends Jimmy, Car, and Sheen back 200 million years!

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At the parent-child picnic, Jimmy gives his dad a bionic sweatband to help their team beat Cindy's./ Jimmy invents a machine that maximizes sleepover fun.

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