[[quoteright:346:http://static.tvtropes.org/pmwiki/pub/images/jn_7147.png]]

->'''[[TheHero Jimmy]]''': It's a heavy burden being a man of science.
->'''[[TheDitz Sheen]]''': I know what you mean, Jimmy. That's why I set out early to sabotage my highly scientific brain with cartoons and sugar.

Based on the movie ''WesternAnimation/JimmyNeutronBoyGenius'', this CGI Nickelodeon series follows the adventures of [[TheHero Jimmy]], a preteen genius who creates inventions in his underground lab. He, his robot dog [[RobotBuddy Goddard]], and fellow grade-schoolers [[TheHeart Carl]], [[TheBigGuy Sheen]], [[BlackBestFriend Libby]] and [[TheLancer Cindy]] (and occasionally extra characters like Bolbi or Betty) save Retroville/the world from invention-induced disasters just about every episode. The show lasted from July 2002 to November 2006. It is the 16th [[Franchise/{{Nicktoons}} Nicktoon]], and the first to be animated using CGI.

Of interest is that the film and television series was made from consumer-grade programs. The show strains to compensate for the lack of raw technical power with very clever visuals. As per the very nature of its premise the "science" was either [[HandWave never explained]] or [[TechnoBabble clearly made up]].

It was a fairly successful show, running for three seasons. It was involved in [[JimmyTimmyPowerHour a few crossovers with]] ''TheFairlyOddparents'' and in later {{Massive Multiplayer Crossover}}s in the ''NicktoonsUnite'' series and ''NicktoonsMLB''.

Feel free to further amuse yourself by checking out the [[Characters/TheAdventuresOfJimmyNeutron Character Sheet]] or [[FanficRecs/TheAdventuresOfJimmyNeutron FanficRecs]]. Also a [[Recap/TheAdventuresOfJimmyNeutronBoyGenius recap page]].

A Spin-Off has been made, ''WesternAnimation/PlanetSheen''.
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!!This series provides examples of:
* ActionMom: Jimmy's mother is incredibly athletic, coordinated, intelligent, and she keeps a plasma rifle in her utility closet (for those tough ground-in stains!)
* AdaptationDecay: ShowWithinAShow example; Principal Willoughby's InNameOnly play "Theatre/{{Macbeth}} [[RecycledInSpace In Space]]".
* AdultsAreUseless:
** In the movie, this is taken to its literal extreme, ThereAreNoAdults, when the grown-up population of Retroville is kidnapped by aliens.
** Played straight with Jimmy's dad in the TV series, who is probably one of the biggest idiots in the city.
** {{Inverted}} with [[ActionMom Jimmy's mom]].
* AesopAmnesia: Jimmy and the main cast.
* AffablyEvil: Professor Finbarr Calamitous.
** His daughter Beautiful Gorgeous inherited this from him.
** Grandma Taters counts as well.
* AIIsACrapshoot: The Nanobots have a bad habit of taking Jimmy's orders to their most logical extreme. After being told to correct for errors and then (attemptedly) [[LogicBomb Logic Bombed]] with "humans' flaws are what make them perfect", they decide to delete humanity.
* AliensSpeakingEnglish: Taken to quite an extreme with not only the Yolkians, but the fact there is a "galactic television lineup" with billions of channels, ''all in English''.
* AllCGICartoon: Notable for being the first film and series animated entirely with off-the-shelf (as in, anyone can buy it) programs, more specifically, [=LightWave=] 3D.
* AlternateHistory: "Time is Money".
* AmbiguouslyGay: Principal Willoughby.
* AnguishedDeclarationOfLove: Almost. Cindy attempts this tactic to calm Hulk!Jimmy down in "The N-Men", but passes out before she can complete her confession.
* AnimeHair: Jimmy's. This is lampshaded pretty regularly.
* {{Area 51}}: Appeared in the movie. In "The N-Men", Cindy, Libby, Sheen, and Carl are taken to "Area 86" after they prove unable to control the superpowers that they developed from contact with space radiation.
* ArsonMurderAndJaywalking: In "Jimmy for President", this is actually inverted, then played straight.
-->'''Miss Fowl:''' It has come to my attention that some of our candidates have been guilty of bribery, blackmail, and ''MURDER!!'' ''[the kids in the audience gasp]'' Sorry, not murder, I meant operating a zeppelin on school premises.
** In "Grumpy Young Men," the boys want to buy a violent video game that has a Media Classifications describing it as "for mature players only due to violence, exaggerated mayhem, and old lady kicking."
* ArtEvolution: The animation in the series was a MAJOR improvement from the pilot. The show itself gradually improved in scope and visuals, which (as mentioned) was limited by consumer-grade software. Later episodes could be compared to the look of an hour-length drama vs. a studio sitcom, with other shows being more cinematic.
* AscendedExtra: Sheen actually had a very minor role in the movie, basically filling out Jimmy's social circle beyond Carl, only to become exceptionally popular and a much more prominent character in the show.
* AsideGlance: In "Sorry, Wrong Era", Jimmy briefly does one when Carl starts dancing calypso and singing while wearing a hula costume.
* AttackOfThe50FootWhatever: Ms. Fowl in "Substitute Creature".
* BackBlocking:
** "Beach Party Mummy": Jimmy, Sheen, Carl, and Cindy were crowding around Libby to give her a makeover. Carl was the one mostly covering up the screen.
** "Win, Lose, and Kaboom": At one point when fighting Meldar's robot army, the camera pans over to the right until April's mother's back fills the screen. Then the camera zooms out from, Meldar's assistant, Vandana's back.
* BackToBackBadasses: Cindy and April in the made-for-TV-Movie "Win, Lose, or Kaboom!" There's even a scene where they run towards each other and then [[CrowningMomentOfAwesome run up each other's feet as though running up a wall]].
* BadFuture: "The Tomorrow Boys": Garbage-Surfer!Sheen, Wanted!Carl, and [=Loser-Married-To-Cindy!Jimmy=].
* BadJobWorseUniform: "Men at Work".
* BambooTechnology: Trapped in prehistoric times because of his Dad goofing around with a time-warping device, Jimmy built a replica with wood.
* BareYourMidriff: Betty Quinlan's Lady Macbeth costume in "Out Darn Spotlight". There is no way this would be worn in an elementary school play in real life.
** There was also Cindy in her N-Men costume and a minor character named Britney [[http://jimmyneutron.wikia.com/wiki/Britney_Tenelli no way a school would let her dress that way.]]
* BatmanCanBreatheInSpace: {{Lampshaded|Trope}} in one episode, where Sheen asks how this is possible. Jimmy's explanation is not heard [[HandWave due to Carl singing during it]].
* BelligerentSexualTension: Jimmy and Cindy.
* TheBermudaTriangle: One episode takes place in the "Bahama Quadrant", which Jimmy, Sheen, and Carl visit so that Jimmy can prove them that nothing supernatural is going on there. They end up finding a super villain/scientist that appears to be the cause for odd sightings and disappearances... [[spoiler:though the ending leaves us questioning it]].
** Sheen once refers to the Bermuda Triangle as the mythological North Dakota.
* BetaCouple: Sheen and Libby.
* BettyAndVeronica: An unusual example. The sweeter, more mature Betty is...well, the Betty, while the edgier and occasionally antagonistic Cindy is the Veronica. In the end he chooses [[spoiler:the Veronica, Cindy.]]
* {{Bizarrchitecture}}
** [=McSpanky=]'s, which is in a burger-shaped building, also including the giant head of the mascot sticking out of its side, with his mouth serving as the drive-thru window.
** The lolipop on the Candy Bar. Although according to NicktoonsUnite, these are only huge to the cast, and would be even smaller than normal to real, live action humans.
* BlackBestFriend: Libby.
* {{Blackmail}}:
-->'''Carl:''' Not that fresh air and ticks in your sleeping bag isn't fun, but why do we have to go camping with you, Jimmy?\\
'''Jimmy:''' Because if you don't, I'll be forced to publish these high-definition photos of you two playing with Pomono Beach Debbie Dolls.\\
'''Sheen:''' Pomono Beach Debbie is an action figure! She possesses special powers that can defeat any adversary[[spoiler: ... except Ultra Lord, of course.]]
** In the episode where Libby, Sheen, and Jimmy run for class president: Sheen blackmails Carl with an embarrassing photograph of him at a party.
--->'''Sheen:''' The one with the [[NoodleIncident bubbles]]!
* BondVillainStupidity: Professor Finbarr Calamitous in "Operation: Rescue Jet Fusion".
* BrainCriticalMass: Jimmy's normally ditzy friend Sheen gets his intelligence increased with Jimmy's Phlebotinum and gains telekinesis.
* BrainWashResidue: Depending on your interpretation of the episode "Love Potion 976/J". Considering that we don't know the extent of the after effects of those love potions, you could have a nice debate on whether Jimmy, Sheen, and Carl's respective loves for Cindy, Libby, and Judy is "real".
* BrawnHilda: After time traveling into an alternate future where he is rich, Jimmy soon discovers he has a cranky, hideous nanny named "Hilgo."
* BrilliantButLazy: Why do something as simple as neatly put away your piles of pants when you can implant chips in them that do it for you? Carl and Sheen call him out on this, though.
* TheBully: Butch is a typical school bully who doesn't have any friends, but an even bigger one is Terry in "Safety First".
* BumblingDad: Hugh.
* ButtMonkey: Jimmy. His inventions usually cause troubles. And when it doesn't come to his inventions, he's picked on by those left and right. How rare is it that the main character falls under this trope?
** For these reasons, Jimmy might also be described as a {{Woobie}}.
** What about Carl? He's the Guinea pig to all of Jimmy's experiments.
* CampGay: Principal Willoughby can come off as this, with his campy behavior and his love for JudyGarland and [[AllGaysLoveTheater musical theater]].
* CannotSpitItOut: Cindy and Jimmy to each other, and, to a lesser extent, Libby to Sheen.
* CantGetInTroubleForNuthin
* CaptivityHarmonica: After being thrown into the brig by the Junkman, Sheen does this.
* CatchPhrase: Jimmy - "Gotta Blast" in the movie and "Brain Blast" in the series.
* CatFight: Cindy and GreenSkinnedSpaceBabe April the Gorlock in "Win, Lose, or Kaboom".
* CharacterDevelopment: For a series so episodic in nature there's a surprising amount, though not in terms of learned aesops, but interpersonal relationships. Throughout the series you can note small but noticeable changes in character interaction. Especially when it comes to [[OfficialCouple romantic couples]].
* ChekhovsGun: The solution to the problem in the episode is usually this.
* ChosenOne: Sheen is called "The Chosen One" by the monks of Shangri Llama, thanks to his strange ability to put his foot behind his head. Subverted because the monks don't really believe he's the ''true'' Chosen One - they were just sick of waiting around for the real one to show up.
** So he's a [[ShapedLikeItself chosen]] ChosenOne?
* ChristmasEpisode: "Holly Jolly Jimmy".
* ColonyDrop: A meteor starts to head toward Retroville just after Jimmy dumbs himself down.
* ComedicUnderwearExposure:
** Jimmy, Carl, Sheen and Cindy's pants get minds of their own and run away... ''in the first episode.''
** The famous "I see London..." gag is actually said in the first episode/movie, by Cindy, when Jimmy's pants fall down.
--> '''Cindy''': I see London, I see France!\\
'''Carl''': Wow, you have really good eyesight....
* ComicTrio: Jimmy, Sheen, and Carl.
* ConfusingMultipleNegatives: Sheen to Mrs. Fowl in "Sheen's Brain". Carl tries the exact same trick, but Mrs. Fowl tells him to "PLANT IT!"
* ContrivedCoincidence: See Colony Drop above.
* CoveredInGunge: In "The Tomorrow Boys", a bucket full of Mrs. Vortex's repulsive chafing-foot scum gets dumped all over Sheen's head.
* {{Crossover}}s: Three times with ''TheFairlyOddparents'' in the ''Jimmy Timmy Power Hour''s.
* CutLexLuthorACheck: Jimmy and his parents could have been millionaires if he sold some of his inventions instead of just making them for fun.
** They backfire way too much for someone to mass produce them, though.
*** Also, Jimmy's dad once got a job making toys, which Jimmy amped up with his technology. The first one was met with such success that he got the job... as long as he kept designing toys of that same calibre every day. Jimmy ended up exhausting himself after a few days, which led to the accident of the week; the Nanobots making a rampage on Retroville on a doll-faced toy tank that grew in size to be a real tank.
* DaddysLittleVillain: Beautiful Gorgeous.
* DemonicDummy: Flippy.
* DemotedToExtra: Nick - he was a somewhat relevant character in the movie, even with just an InformedAbility. In the series, he hardly gets any screen time.
* DisqualificationInducedVictory: During a parent/child competition, Jimmy uses technology to augment [[BumblingDad his dad's]] athletic skills and ends up disqualified.... and his [[TheRival Rival]]-slash-[[SheIsNotMyGirlfriend not-girlfriend]] also gets disqualified because she used an Olympic-athlete aunt as a ringer for her mom... and then every other team admits to doing a disqualification-worthy fault at one point of the competition or another, leaving only Jimmy's [[TheChewToy Chew Toy]] friend Carl and his equally-unlucky dad [[ThrowTheDogABone (who were dead last) the winners by default]].
* DistractedByTheSexy: Sheen with practically any attractive female (most notably Libby, Beautiful Gorgeous, Sally and Princess Guan Qi "Peggy" Tsu); Jimmy with Betty Quinlan, Sally, April, and later with Cindy. And Carl with Jimmy's mom.
* TheDitz - Bolbi, though he seems like just a goofy foreigner at first.
* DoAnythingRobot: Goddard, Jimmy's RobotDog, seems to have a large arsenal of gadgets tucked away inside his chassis.
* DoorToDoorEpisode: Complete with Jimmy using science to employ a ZanyScheme.
* DutchAngle: Spoofed in "The Evil Beneath" where during the villain's brief and crazy MotiveRant the camera slowly tilts itself, [[PaintingTheMedium which causes his henchman and furniture to slide in the direction the camera is tilting.]]
* EatTheCamera: Seen at the end of "The Phantom of Retroland" after among seeing [[spoiler:the real Phantom]], Hugh runs screaming right into the camera, his mouth covering the frame and turning it black.
* EgocentricTeamNaming: When Jimmy and his friends gain superpowers due to cosmic radiation he immediately calls them the "N-Men" (as in, Neutron Men), despite a couple of protests.
** In the episode where they form a band, Sheen proposes the name "Sheen and the Sheenettes".
* [[PlotTailoredToTheParty Eigen Plot]]: Win, Lose, and Kaboom, to the point where Jimmy's CharacterDevelopment is based around realizing it is one and learning he can't do everything by himself.
* ElectionDayEpisode: One episode had Cindy and Jimmy face off against each other for class president. [[spoiler: They were both disqualified for cheating, so the election is given to [[DarkHorseVictory Bolby the weird new foreign exchange student]].]]
* EpicFail: After losing to many times in a gym race against Cindy, Jimmy sprays his shoes with a chemical compound to give him super speed. He runs in circles around her and showing off how fast he is, all gloating and confident, but he ''still'' lost. Why? Because he fell for the old point-and-look-behind-your-back distraction, the object of interest being a "1957 Van de Graff electrostatic generator".
* EskimosArentReal: Sheen is positive that ancient Egyptian curses are a myth, just like the Loch Ness Monster and North Dakota.
* EveryoneCanSeeIt: Jimmy and Cindy. Thankfully, the BelligerentSexualTension gradually faded into a genuine attraction, and they finally got together in the last episode of the series.
* EverythingsBetterWithDinosaurs: "Sorry, Wrong Era".
* EverythingsBetterWithMonkeys: "My Big Fat Spy Wedding".
* EvilTwin: Jimmy's evil clone in "Send in the Clones".
* EvolvingCredits: Certain clips in the opening eventually got replaced with clips from newer episodes. Libby got [[PromotionToOpeningTitles promoted to opening titles]] at the same time.
* {{Expy}}: When they all get superpowers it is exactly the same as other well-known superheroes. Cindy has {{Superman}} flight and strength, Libby is [[Franchise/FantasticFour The Invisible Woman]], Sheen is TheFlash and Carl...well has burps that seem like Black Canary. Jimmy was originally just turned orange, until [[TheHulk he got angry...]]
** Tee is an alien who talks and acts like Creator/MrT.
** And another alien, Travoltron, acts like JohnTravolta. Or at least his character in SaturdayNightFever.
** The third one, Zix, talks like Jon Lovitz. A bit more devious than Jon Lovitz though ...
** Quentin Smithee seems to be simply an expy of Creator/QuentinTarantino (combined with a nod to the tendency for directors who have disowned films to credit themselves as AlanSmithee) up until we find out [[spoiler: he's actually Professor Calamitus]]
** Jet Fusion is a Film/JamesBond expy.
* FaceFullOfAlienWingWong (Carl is impregnated with an alien child in "Who's Your Mommy?". The extra fat grows out from well, his butt - but let's not go there.)
* FaeriesDontBelieveInHumansEither: Pops up at the end of the sleepover episode. The climax of the episode features a series of increasingly-nonsensical {{Catapult Nightmare}}s involving the various characters and a flying vampiric [[ImAHumanitarian cannibal]] pizza. The final nightmare turns out to belong to an actual pizza vampire, sleeping in his pizza box; when he explains his terrible dream to his wife, she consoles him that children don't exist, everyone knows that.
* FantasticVoyagePlot: "Journey to the Center of Carl".
* FemBot: In the episode "Maternotron Knows Best", Jimmy constructs a robotic substitute mother while Judy is away at the spa.
* FiveManBand:
** TheHero / TheSmartGuy: Jimmy
** TheLancer: Cindy
** TheBigGuy: Sheen
** TheChick: Libby
** TheHeart: Carl
** TeamPet: Goddard
* FMinusMinus: In one episode, Sheen gets an F with ''[[UpToEleven four]]'' minuses on a test.
-->'''Sheen''': Well how was ''I'' supposed to know [[BookDumb Ultra Lord wasn't our founding father?]] That's what it said in the Ultra Lord website!\\
'''Jimmy''': Wait; didn't ''you'' write the Ultra Lord website?\\
'''Sheen''': [[ComicallyMissingThePoint Your point?]] (''[[{{Beat}} Jimmy walks away as Sheen thinks for a moment]]'') Oh...
* FreakyFridayFlip: Jimmy and Cindy in "Trading Faces".
** Incidentally, at the end (where they had to manually switch back their memories) They found that one of the two had an extreme dislike of the other one. However Sheen said that it got too confusing reading the hilariously long name and deleted it, never getting to the end (and thus, figuring out who it belonged to). It is after that one that the two started getting closer.
* FreeRangeChildren: The fifth grade cast behaves more like young adults/older teenagers. They run all about Retroville, hang out at the local fast food joints, and that's only what they do when not on an adventure caused by Jimmy's invention.
* FromTheMouthsOfBabes: Baby Edward "Eddie" Neutron, Jimmy's infant evil cousin, who can be ''very'' crass at times.
* FunnyForeigner: Bolbi Stroganovsky from Backhairistan.
** "Slap slap slap, clap clap clap, slap, slap, slap, clap clap clap..."
* FutureLoser: Jimmy in "The Tomorrow Boys".
* GarageBand: There was an episode where Jimmy & co. try to start a band for a talent show.
* GettingCrapPastTheRadar: Now with its [[Radar/TheAdventuresOfJimmyNeutronBoyGenius own page.]]
* GhostInTheMachine: [[AffectionateParody Playfully parodied]] in "Incredible Shrinking Town", where Sheen pretends to be Tee's inner voice.
--> '''Tee''': "Thanks, bug in mah head!"
* GiantSpider: "Stranded".
* GirlsHaveCooties: Jimmy, Sheen, and Carl all exhibit this sentiment from time to time, especially at the beginning of the series. It wears off as the show progresses, however, giving way to DistractedByTheSexy.
* GiveGeeksAChance: Sheen and Libby, definitely.
* GodzillaThreshold: In the finale, Jimmy asks Carl to take his rocket and bring the N-Men packets with him. You know, the chemicals that would bring back [[CastFromLifespan the superpowers that put the entire cast on the brink of death]] last time? [[OhCrap Carl sure does]].
* GoldFever: Ruby madness in "A Beautiful Mine".
* GoofyPrintUnderwear: In "When Pants Attack", Hugh runs around in a pair of white, heart-covered boxers. He can be seen wearing these (and only these!) again in "Lights! Camera! Danger!" during his Gollum impression.
** In the same episode everyone else Sheen's imported Ultralord underwear, Jimmy's plaid boxers and Cindy's polka dot panties
** On one occasion, Carl's underwear was said to have llamas on them.
* GreenSkinnedSpaceBabe: April the Gorlock.
* GroundhogDayLoop: Jimmy's birthday in "Hypno-Birthday to You".
** {{Justified|Trope}} in that his parents were brainwashed to think every day was his birthday.
* HalloweenEpisode: "Nightmare in Retroville".
* HandPuppet: Sheen in "Broadcast Blues".
* HandshakeRefusal: In "The Eggpire Strikes Back", Jimmy refused to shake hands with King Goobot, suspicious of a picnic he's hosting.
* HandWave: Naturally, due to the show playing fast and loose with science. Most blatantly used when Sheen asks Jimmy [[BatmanCanBreatheInSpace how they could survive in space without spacesuits]] or [[SciFiWritersHaveNoSenseOfScale how they can get to the moon in mere minutes]], but Carl's singing blocks out Jimmy's answers.
* HatePlague: Ruby madness in "A Beautiful Mine".
* HeadDesk: Done by Jimmy when he couldn't think of a script for a movie.
* HilariousOuttakes: These appear out of the blue at the end of the episode "Crouching Jimmy, Hidden Sheen".
* HollywoodToneDeaf: Sheen is mocked relentlessly for his inability to sing throughout the series - there is even a reprise song number at the end of "My Big Fat Spy Wedding", where the characters belt out in glorious harmony "We all can sing except Sheen!" Becomes beneficial in "Attack of the Twonkies" - Sheen's singing is ''so bad'' that it actually puts the Twonkies (who normally become enraged and then mutate when they hear music) to sleep.
* HornedHairdo: In one episode, Jimmy clones himself to make multiple {{Literal Split Personalit|y}}ies. The evil clone has two tufts of hair in contrast to Jimmy's one.
* HorribleCampingTrip: "Aaughh!! Wilderness!!" due to Hugh's stupidity.
* HowDoIShotWeb: "The N-Men".
* HumansAreMorons: Meldar and most of the aliens from "'Win, Lose and Kaboom" laugh at the human contestants because it took them long to transport themselves to the game show.
* IdiosyncraticWipes: Almost every scene transitions with the show's trademark atom logo flying away and then back towards the camera, with several similar music cues to accompany it.
* IdiotHero: For a [[TVGenius genius]], Jimmy sure makes a lot of utterly stupid decisions. In fact, most of the conflict that goes on in this show is the result of Jimmy making a [[NiceJobBreakingItHero questionable judgment call]] in the first place regarding his experiments. But then again, Jimmy's lack of common sense is arguably one of the main points of the series. He may be a "genius," but he's still a child.
* ImAHumanitarian: Implicitly Carl, after thinking his stomach was growling during the HorribleCampingTrip (it turned out to be a bear.)
-->'''Carl:''' Oh no... It's starting! The gnawing hunger! MUST... RESIST... DESIRE... FOR HUMAN FLESH!!''
* IKnowKarate: Cindy - she actually says this in "King of Mars".
* ImportantHaircut: Libby gets one in the episode "Beach Party Mummy" to fool a bunch of mummies that were chasing the gang. She keeps the new look for the remainder of the series.
* ImpossiblyDeliciousFood: In the episode "Krunch Time".
* IncredibleShrinkingMan: Jimmy at various points throughout the series. {{Lampshaded|Trope}} in "Incredible Shrinking Town".
* IngestingKnowledge: Jimmy creates Books Chewgum with this effect.
* IsolationDespondency: In "The Feud", Jimmy and Carl are forbidden to play with each other again by their fathers, due to an incident involving weed spray that was borrowed and never returned.
* [[StacysMom Jimmy's Mom]]: "Has Got it Going On", says Carl.
* JourneyToTheCenterOfTheMind: Jimmy goes to Carl's mind in "I Dream of Jimmy".
* JustTestingYou: "Carl Wheezer, Boy Genius" has this exchange:
-->'''Jimmy''': May I suggest that instead of the arm-missiles button, you push the one right below it?\\
'''Carl''': I know what button to push! I was just testing you.
* KidsAreCruel
* LargeHam: Both King Goobot and Ooblar have their moments. "[[CrowningMomentOfFunny HELLO, TOAST!]]"
* LastMinuteHookup: Jimmy and Cindy in "Lady Sings the News".
* LatexSpaceSuit: Cindy in "King of Mars".
* LegionOfDoom: "The League of Villains".
* LimitedWardrobe: The only time a character's plain-clothes outfit changes is the episode where Libby gets a makeover, and declares that she's keeping the new look. From then on, ''that'' became the outfit she wore every episode.
* LoveTriangle: Betty and Cindy toward Jimmy, though the latter two would claim not to like each other.
** In the Jimmy Timmy Power Hours, there was also [[WesternAnimation/TheFairlyOddParents Timmy]]/Cindy/Jimmy -- the two boys fight over her in the second power hour ("When Nerds Collide"), but Cindy ends up [[spoiler: in a way, going with ''both'' of them since she wished for a cross-dimensional dance party for Dimmsdale and Retroville's elementary schools so she can dance with both Jimmy and Timmy.]]
** Carl's infatuation with Jimmy's mother.
* LovePotion: Another one of Jimmy's inventions. It causes him to fall for Cindy, and Sheen for Libby. And Carl falls for Jimmy's Mom, which then goes on to become a RunningGag. Poor Carl.
** Poor Carl? How about "Poor Judy?"
* MadScientistsBeautifulDaughter: Beautiful Gorgeous, Calamitous' daughter, subverts this: she's actually evil.
* TheMasochismTango: Jimmy and Cindy
* Creator/MelBrooks: Guest stars in the ChristmasEpisode...as ''SantaClaus''.
* MesACrowd: Jimmy's clones in "Send in the Clones"; each one represents a different personality type.
* MeaningfulName: James "Jimmy" Isaac Neutron is not surprisingly, interested in science.
** Also Jimmy's classmate Nick Dean, a child version of move badboy James Dean.
** Sheen Estevez; a ShoutOut to Charlie Sheen and Martin/Emilio Estevez.
** And Jet Fusion, the in-show version of James Bond (fusion actually means bond)
** [[MadScientistsBeautifulDaughter Beautiful Gorgeous]] is [[ShapedLikeItself beautiful and gorgeous.]]
** Movie director Quentin Smithee, [[AlanSmithee who had no records at all]]... [[spoiler:because he was really Professor Calamitous in disguise.]]
* MindScrew: Jimmy traversing Carl's Dream. Being well, a dream, for the most part, it has no logic or sense. Though like most dreams, Carl sees it as perfectly normal. So Jimmy, in order to prove to him, without a doubt, that this is not the real world, does something that could possibly never happen in real life, he kisses Cindy.
* MissingMom: Sheen. WordOfGod says his mother died when he was young - they don't say her cause of death, however.
* MisterSeahorse: See FaceFullOfAlienWingWong above.
* MonsterMash: Occurs in the HalloweenEpisode, "Nightmare in Retroville".
* MyBrainIsBig: Averted to an extent, with the size of Jimmy's head. A lot of characters assume that Jimmy's big head explains his extreme intelligence, but in reality he just has a gigantic hairdo.
** Played straight however, in the episode "Sheen's Brain", where Sheen's intelligence increases as his head grows bigger.
* MyFutureSelfAndMe: Jimmy, Carl, and Sheen all get to meet their future selves as well as future Cindy and Libby.
* NakedPeopleAreFunny: In "Jimmy Goes to College", the boy genius streaks through the halls of the Pomona School of Advanced Physics - only to find himself face to face with the elderly female patroness of the coveted Moran Grant. He quickly covers his front with a book and his backside with an exit sign.
** In the movie, Sheen can be seen naked - peeing, in the shower.
-->'''Sheen''': I'm peeing! In the shower! I'm still doing it! ''( Pumps both hands in the air)'' Go go go!
* NeverMyFault: In "King of Mars", Cindy blames Jimmy for her brief FaceHeelTurn with Eustace, for never paying any attention to her, and after Eustace double-cross her.
* NeverSayDie: In "The N-Men", Jimmy has to save himself and his friends before their "life forces" are depleted.
* NiceJobBreakingItHero: Nearly every episode and movie is this. Jimmy's inventions and motives usually cause the problem of the week and it's up to him to fix the problem he caused.
** Of course, Jimmy's friends also get in on the act every now and then. In "The Eggpire Strikes Back" [[spoiler: Cindy told King Goobot how to get into Jimmy's lab, giving him the tools he needed to revive Poultra.]]
* OffscreenTeleportation: Seems to be an ability of the Needleheads from "Win, Lose and Kaboom".
* OneWheeledWonder: Jimmy Neutron designed his android little brother Brobot this way.
* OnlyKnownByTheirNickname: Almost every major character.
* OverlyLongScream: {{Lampshade|Hanging}}d by Carl in "The Tomorrow Boys" when Jimmy finds out in the Bad Future that he is MARRIED to Cindy. He starts screaming, we cut to commercials... We come back, and he's still screaming.
-->'''Carl:''' "Wow, Jimmy, you just screamed for [[LeaningOnTheFourthWall 4 minutes]]."
* OtherMeAnnoysMe
* PantyShot: Cindy gets a few... [[strike:gracious]] {{egregious}} shots (blue thong) in "The N-Men".
* ParodyNames: Quite a few of the [[IdiosyncraticEpisodeNaming episode titles.]]
** Examples include "I Dream of Jimmy" (I Dream of Jeannie), "A Beautiful Mine" (A Beautiful Mind), "The Junkman Cometh" (The Iceman Cometh), "Love Potion #976/J" (''Love Potion #9''), "Crouching Jimmy, Hidden Sheen" (Crouching Tiger, Hidden Dragon), "My Big Fat Spy Wedding" (My Big Fat Greek Wedding), and "Trading Faces" (Trading Spaces, although the episode was originally titled "A Mind is a Terrible Thing, Two Ways" - a parody of the educational slogan "a mind is a terrible thing to waste).
** "Journey to the Center of Carl" (JourneyToTheCenterOfTheEarth) is ''actually'' a FantasticVoyagePlot.
* ParodyEpisode: Quite a few. "Lights! Camera! Danger!" is notable for combining parodies of ''Film/TheMatrix,'' ''Film/HarryPotter,'' ''Film/TheLordOfTheRings,'' and ''Chicago,'' and [[ReferenceOverdosed references a truckload more.]]
** Specific targets for a single parody episode include ''Film/{{Jaws}},'' ''Film/FantasticVoyage,'' and ''Film/TheTreasureOfTheSierraMadre'', and there's one episode devoted to poking fun at various superhero movies. One episode is devoted to old horror monsters like ''Film/{{Frankenstein|1931}},'' ''Film/{{Dracula|1931}},'' and ''Film/TheWolfMan1941.'' Not even ''Theatre/{{Macbeth}}'' and ''StarWars'' were immune. In the same episode. At the same time.
* PlayingSick: Invoked by Jimmy when he invents patches that make the wearer sick when applied. He gives them to the rest of the kids so they can skip school. [[spoiler:Until they get absorbed into their bodies, forcing Jimmy and Sheen to pull a FantasticVoyagePlot into Carl to get the cure needed.]]
* PhlebotinumInducedStupidity: Jimmy's Brain Drain in "Normal Boy" makes him an idiot.
* PivotalWakeup
* PlotInducedIllness: {{Invoked|Trope}} when Jimmy invents a "sick patch" that make the wearer sick when applied, which the kids then use to stay home from school.
* PrecociousCrush: Carl toward Jimmy's mom, Judy.
* {{Premiseville}}: Retroville has a retro theme.
* PteroSoarer: "Sorry, Wrong Era" has a classic example in the form of a ''Pteranodon'' that, for a short list, is called a "pterodactyl", is scaly, has pointed leathery wings, can pick things up with its feet, rears its unusually large young like a bird, flies inland, eats lizards instead of fish, lives in the same time as T-Rex and is bipedal. That being said, the writers did manage to get the lack of teeth and single wing finger right (although said wing finger is unusually flexible).
* PunnyName: Ms. Fowl has a few bird-like attributes
* RealAwardFictionalCharacter: When Jimmy peeks into his and his friends' futures in one episode, he sees himself as the first-ever winner of the Nobel Prize in bulk.
* RealityWarper: Meldar, the BigBad of "Win, Lose and Kaboom" can do this thanks to his matrix generators. He even ''says'' that he can warp reality.
* RecycledInSpace: InUniverse. The school play from ''Out Darn Spotlight'' was known as ''Theatre/{{Macbeth}} [[RecycledInSpace in Space]]''.
* RecycledTheSeries: This show was the result of the successful [[JimmyNeutronBoyGenius Jimmy Neutron movie]].
* RecurringExtra: The Twonkies.
* RetroUniverse: Retroville.
* RivalTurnedEvil: An unusual case in "The N-Men" - Jimmy himself is this due to finally getting fed up over how Cindy keeps overshadowing him. This sets him on a HulkingOut rampaging spree, and the irony is that the only one who stops him is Cindy herself.
* RobotBuddy/RobotDog: Goddard.
* RobotKid: Brobot.
* RomanticFalseLead: Betty.
* RunningGag: Jimmy making something using Hugh's toasters.
** Carl's crush on Jimmy's mom, Judy.
** Nick: "Oww, I broke my leg."
*** The ''exact same footage'' is used for this scene every time this happens. "Lady Sings the News" even [[LampshadeHanging Lampshades]] it when Jimmy and Cindy note that this has happened ''15 times'' with Nick, and that everyone is ''expecting'' it to happen to Nick again shortly after he recovers.
** The Twonkies that Sheen had after an episode appear in several later episodes; they don't morph however.
** Various iterations of "the little boy's room" are used when a character has to pee, including "the little boy's ocean" by Carl when the boy's are flying over the ocean in Jimmy's hovercraft.
** Carl also had his highly sensitive scapula.
* SamusIsAGirl: Beautiful Gorgeous. She was wearing robotic armor similar to Samus'.
* SarcasmBlind: Cindy in "Out, Darn Spotlight".
* SassyBlackWoman: Libby.
* SatireParodyPastiche: Numerous examples of this include "Attack of the Twonkies" (''Film/{{Gremlins}}''), ''Monster Hunt'' (''Film/{{Jaws}}''), "Stranded" (''CastAway''), "Love Potion #976/J" (''Love Potion #9''), "Lights! Camera! Danger!" (''Film/TheMatrix'', ''Literature/TheLordOfTheRings'' and ''Literature/HarryPotter'', to name a few), "Win Lose and Kaboom" (every gameshow ever) and "Operation: Rescue Jet Fusion" (''Film/JamesBond'').
* SchoolPlay: ''Theatre/{{Macbeth}} in Space''.
* SchmuckBait
* ScienceHero: Jimmy, who solves the problems his inventions create.
* SelfDestructMechanism: Goddard has one, though he can reassemble himself.
* SeverelySpecializedStore: Retroville has stores like Cheese World, Mime World, and Rug World.
* {{Shout Out}}s (Some episode titles, such as "[[Series/TheTomorrowPeople The Tomorrow Boys]]")
** [[ActionLeagueNow Meltyface]], [[KaBlam anyone?]]
** "[[Film/BlazingSaddles Uh, Libby, I don't think they need no stinkin' badges.]]"
** [[Series/DoctorWho Jimmy's Blue Time Traveling Telephone Booth,]] anyone?
** Cindy's entire character could be a shout out to June from KaBlam! Let's see, bossy 10-11 year old girl with a ponytail, crush on the main boy...
*** Or [[HeyArnold Helga]].
** "The N Men", particularly Retroville's reaction, is similar to the Franchise/{{X-Men}}.
*** Not just that, but Cindy, Sheen, Libby and Carl's powers are similar to {{Supergirl}}, TheFlash, [[Franchise/FantasticFour The Invisible Woman]] and [[Franchise/{{X-Men}} Banshee]], well if Banshee was [[{{Gasshole}} burping]] instead of screaming. Carl's costume is also a shout out to ComicBook/PlasticMan. Jimmy was well, orange...[[spoiler: right until he turned into TheHulk with a skin design similar to [[Franchise/FantasticFour The Thing]]]].
**** And, think of Sheen's name idea. The [[ComicBook/FantasticFour Fantastic]] [[ComicBook/JusticeLeague League of Justice Bringing]] [[ComicBook/TheAvengers Avenging]] Men (and two girls!)
** Jimmy in ''Hall Monster'' is like a condensed version of ''Literature/NineteenEightyFour''
** Sheen's full name seems to be a ShoutOut to actors (and brothers) Creator/CharlieSheen and Emilio Estevez.
--->Sheen: (As he and his friends ride down a ''T. rex'''s tail) [[TheFlintstones Yabba Dabba Dooooo~!]]
** One ride seen at Retroville in the movie has the name "[[Music/MeatLoaf Bat Out of]] [[GoshDangItToHeck Heck]]".
** Mr. Neutron's full name is [[LeaveItToBeaver Hubert Beaumont]] Neutron.
** "Crouching Tiger, Hidden Sheen" has a definite air of ''KungPowEnterTheFist''.
** In The HalloweenEpisode, Jimmy builds a machine that turns people into monsters. One of the monsters pictured is Music/MichaelJackson (specifically, werewolf Jackson from the ''Thriller'' video).
*** In addition, when naming off monsters that Carl could turn into, Jimmy mentions Frankenstein. Sheen pipes in with a [[Film/YoungFrankenstein "FRAHNK-en-steen".]]
** Leppy the ''Leptictidium'' shares a color scheme with the ''Leptictidium'' from ''WalkingWithBeasts''. Incidentally, this program's first scene also showed it [[AnachronismStew erroneously living in the Cretaceous]].
** One of Hugh's friends is named VideoGame/MaxPayne.
** Upon gaining superpowers, the Wheezer family replicate the canyon-jumping sequence seen in ''Film/{{Hulk}}''.
** The episode where they go inside the UltraLord Videogame, has a interesting shout-out to "The Wizard and the Princess" [[note]] a largely forgotten Sierra Adventure game, which is the spiritual prequel to KingsQuestV, and is even considered by many as "Kings Quest Zero" [[/note]] As the game had a infuriating puzzle, in which you had to traverse a desert find a rock, but it has to be a certain screen, or else a snake underneath would kill you.
* ShowWithinAShow: [=''UltraLord''=] -- Sheen is crazy over it to the point of claiming that Ultralord fills George Washington's role as the father of America.
* SixStudentClique: With 5 students
** The main character: Jimmy
** The Muscle: Sheen
** The Quirk: Carl
** The Pretty One/The Smart One: Cindy
** The Wild One: Libby
*** Alternatively
** The Head/The Smart One: Jimmy
** The Muscle: Cindy
** The Pretty One/ The Wild One: Libby
** The Quirk: Sheen and Carl
* SlapSlapKiss: Jimmy and Cindy.
* SpaceDoesNotWorkThatWay: {{Lampshaded|Trope}} when Sheen asks Jimmy [[BatmanCanBreatheInSpace how they could survive in space without spacesuits]] or [[SciFiWritersHaveNoSenseOfScale how they can get to the moon in mere minutes]], but [[HandWave Carl's singing blocks out Jimmy's answers]].
* SpaceWhaleAesop: The pilot episode, "When Pants Attack", has one: Always remember to be responsible and clean up after yourself, because if you don't, those pants that you forgot to pick up off your floor might become sentient and go on a mad rampage.
* SpecialEditionThemeSong: The Music/BowlingForSoup theme used in TheMovie.
* SpinOff: ''WesternAnimation/PlanetSheen''. Guess who's the star?
* StandInParents: Cindy Vortex had an aunt stand in for her mother at Retroville's parent/child sporting day.
* SuperheroEpisode: "The N-Men".
* SuspiciouslySpecificDenial:
-->'''Sheen:''' Don't do it Jimmy. Don't tell him about the limitless power-source you found on Mar-''(Jimmy covers his mouth)''\\
'''Carl:''' And we're not going there to get the limitless power-source if that's what your thinking- ''(Jimmy covers his mouth)''\\
'''Sheen:''' MARS! ''(beat)'' Sorry I just get excited.
* StalkerWithACrush: Carl toward Jimmy's mom. It's shown in several episodes that he has a picture of her and Hugh. Hugh's face is obscured by Carl's taped over it. Cindy comes off like this to Jimmy In Season 3. [[spoiler: She and Jimmy do get together in the Finale.]]
* TakingYouWithMe: [[spoiler:After being defeated, Evil Jimmy breaks the dark matter chip he used to create his evil copy of Earth, causing the entire planet to be sucked into the the dark matter dimension in an attack to take Jimmy down with him.]]
* TimeMachine: Jimmy's Time Booth.
* TimeTravel
* TheFullNameAdventures
* TheScottishTrope: In the episode "[[OutDamnedSpot Out, Darn Spotlight]]", bad things would happen whenever someone in the play said [[spoiler: Theatre/{{Macbeth}}]]
* TotemPoleTrench: Seen in "The Phantom of Retroland," when Cindy and Libby dress up as the titular Phantom to scare Jimmy and his friends (Libby on top and wearing the mask, and Cindy on bottom.)
* TropeyComeHome: The storybook ''Goddard Come Home!''
* {{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.
* UglyGuyHotWife: Hugh and Judy, though Hugh's just a moron, and Carl and Elkie, though it's just a one episode fling, and then there's The Junkman and Beautiful Gorgeous.
* UndeadAuthor: Jimmy points out the difficulties with this.
* UnEvilLaugh: Eustace Strych and Beautiful Gorgeous.
* UnresolvedSexualTension: Jimmy and Cindy, which slowly developed into a real romance.
* VillainTeamUp: The League of Villains consists of King Goobot, Finbarr Calamitous, Beautiful Gorgeous, evil genius Eddie, the Junkman, Eustace Strych, Grandma Taters and the Space Bandits.
* WalkIntoCameraObstruction:
** "Grumpy Young Men" with Jimmy when he is quickly dragged to his lab by Carl and Sheen
** "Nightmare in Retroville" with Sheen in his werewolf form, when he leads the other monsters on a rampage through town, his nose obscures the screen.
** "Lights! Camera! Danger!" with Quentin Smithee when he is about to start the next scene the "Save the Day" song.
** "The League of Villans" Where T grabs Jimmy and Sheen in the courtroom; hands fill the screen.
** "Professor Calamitous, I Presume" Calamitus in the robot suit attempts to kidnap Goddard
* WalkThroughTheCamera:
** "The Eggpire Strikes Back", the scene at school where Ooblar tries to break up Jimmy and Cindy's argument. "Pipe down!" And where Jimmy and Goddard run to the park where Poultra's egg is.
** "Professor Calamitous, I Presume", with Calamitus in the robot suit walking to Jimmy's house.
* WhereTheHellIsSpringfield: Averted - Retroville is in Texas.
** This is also played with in one of the episodes where Jimmy states that his script for a movie has one of the locations in 'a fictional city in Texas'. Although, in the first episode Cindy mentions that Jimmy's head is the size of Texas, to which Carl, upset, replies that his uncle is from Texas, and not that they live in Texas.
** The company who does the animation on the series is itself based in Dallas.
* YellowSashOfPower: Jimmy in "Hall Monster".
* YourHeadAsplode: Almost happens to Sheen when Jimmy decides to increase his intelligence by [[MyBrainIsBig growing his brain]].
* YouthfulFreckles: Libby gained some in season 2 after her redesign.
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