The predecessor to NickelodeonCGI seriesThe Adventures of Jimmy Neutron: Boy Genius, this 2001 movie was originally going to be simply a pilot episode for the series. Instead, the Nickelodeon executives were so impressed they gave it funding for cinematic release.Ten-year-old boy genius Jimmy Neutron has an IQ of 210. He invents rockets in his spare time, for launching satellites to communicate with alien races. (Of course.) Jimmy also has a robotic dog called Goddard that can do pretty much anything, a disproportionately large head and a strange hairdo - a fact constantly brought to the surface by his rival, Cindy Vortex. He's just living his ordinary life (get up, get his robot to do his hair for him, travel to school via gum that turns into a transportation bubble, show off his shrink ray in Show And Tell, etc.) when the communication satellite he launched at the beginning of the movie is intercepted by some egg-shaped aliens named 'The Yolkians'. (The King is voiced by Patrick Stewart, and his brother/comic sidekick Ooblar is voiced by Martin Short.)Character Sheet is here if wanted, but be warned - there are multiple spoilers for the series itself in there.
Early-Installment Weirdness: Cindy's hair; pigtails in the movie, ponytail in the series that came after. All the kids had different character designs. Jimmy wore shorts and loafers instead of sneakers and jeans, Carl wore suspenders, and Sheen had collars on the end of his sleeves.
Funny Background Event: While watching Jimmy's message, Ooblar absentmindedly munches on the piece of toast he had enthusiastically greeted earlier in the scene, getting a rather disturbed look from King Goobot in the process.
Getting Crap Past the Radar: Jimmy's whole puberty talk with Carl on how one day they'll have to start liking girls against their will.
Of course we know what the theme for the ride "Bat Out of Heck" is going to be.
"I'm peeing in the shower!"
Girls Have Cooties: Jimmy, Sheen, and Carl all exhibit this sentiment from time to time. Especially Jimmy, who engineers a man-eating plant to target girls with pigtails.
Gone Horribly Right: All Jimmy wanted to do at the start of the film was to make contact with an advanced alien civilisation. He succeeded, all right. Turned out the aliens picked up the satellite and abducted the parents in Retroville to use them as sacrifices for Poultra. Oops.
Missing Mom: Sheen. Word of God says his mother died when he was young - they don't say her cause of death, however.
Fits also with Early-Installment Weirdness: Sheen's mom is clearly present in the end scene with Sheen's dad. His dad also displays a very different attitude from his few appearances later in the series (he's much... more fatherly than he later was shown to be.) She just suffered Chuck Cunningham Syndrome that was retroactively remade into her having died when Sheen was little.
Missing Trailer Scene: Pretty much everything in the teaser. Justified, as a lot of it is very early test footage. Most of the scenes got recycled for smaller shorts that premiered during commercial breaks on Nickelodeon around the time the film came out.
Pet the Dog: Rather than being condescending, Jimmy is very nice to the rather dopey Carl and nerdy Sheen, not being a wet blanket when Carl shows him a picture of a frog or talks about wishing on a star.
Tsundere: Cindy. In the original movie she explains that she only became one to Jimmy, because she was jealous of his better grades and hated his tendency to show off his intelligence on every given occasion.
Unintentional Period Piece: Since the movie came out in 2001, it has a lot of early 2000's "culture" in it, especially in the music on the soundtrack.