History Characters / TheAdventuresOfJimmyNeutronBoyGenius

* InSpiteOfANail: In the AlternateUniverse where he invested in [=McSpankies=], he still married Judy (despite the fact that he's wealthy, and can have any wife he wanted).

** The first is when Jimmy altered the past so that his dad would invest his only money ($50) into the then non-popular restaurant [=McSpankies=], to make his parents rich and allow him to get an expensive set of encyclopedias that he wants. Unfortunately along with Judy, he becomes a snobby rich man with no interest in his son, forgetting his name and offering him some money to leave. He even refuses to help pay for a lifesaving operation for his father merely because he does not want to lose any money.

* AbortedArc: After taking the melted McSpanky's building as their vessel, Zix states that they'll go hunt down the "captain" Skeet. But this never went anywhere unless they found him offscreen.

* KavorkaMan: A rare female example. She attracted Thomas Edison, went dancing with President Hoover, flirts with Sam and was once married to a werewolf.

* ADayInTheLimelight: Goddard is by all means a main character, but the only episode that gives him the focus is "Best in Show", one of the last ever aired.

* ADayInTheLimelight: In "Maternatron Knows Best".

* ADayInTheLimelight: In "Out Darn Spotlight" and "Vanishing Act".

* StarterVillain: He was the first villain in the franchise. Ironically, he was also the FinalBoss in ''The League of Villains''.

* BreakTheCutie: He becomes a victim of this whenever something really bad happens to someone he deeply cares about. Especially Goddard. This also happens when his insecurities are shown. In "The N-Men", Jimmy spends pretty much the entire episode being bullied, ignored, and insulted by his so-called "friends." He becomes so fed up, that he turns into a Hulk-like creature and terrorizes the town for revenge.

* DumberThanTheyLook: Carl Wheezer, despite having the big glasses, [[GeekPhysique portly physique]] and breathing problems of a prototypical nerd, is only marginally smarter than resident {{Cloudcuckoolander}} Sheen, the episode "The Junkman Cometh" implying that he's even ''dumber'' when the titular Junkman scans their brains. [[LampshadeHanging Lampshaded]] on "Birth of a Salesman" when Jimmy's robot salesman says that Carl looks like a smart guy, and Carl remarks "Nuh-uh, it's just the glasses."

* ComicallyMissingThePoint: In "Maternotron Knows Best", Robot Judy gives Sheen and Carl application forms. Sheen's question is "Jimmy falls in the playground and breaks his leg. What do you do?" His response: "Well that's a stupid question. They don't even tell you which leg it is."

* VerbalTic: "Human boy."

* LikesOlderWomen: Carl has a crush on Jimmy's mom since ''Love Potion #976-J''. He's also attracted to the class' teacher, Miss Fowl, who's in her fifties. At ''least''.

* MeaningfulName: Her dad wasn't exactly very creative with the name. Or subtle.

* BareYourMidriff: As Special Girl.

* BareYourMidriff: When she played Lady Macbeth.

* BareYourMidriff: She wears a pink and white midriff shirt.

* AttentionDeficitOohShiny: More or less made explicit in "Sheen's Brain", wherein his ability to learn is limited by his concentration difficulties and hyperactive demeanor. This is what basically dooms his chances to pass the test that'll secure him staying in fourth grade, prompting Jimmy to fix it scientifically (temporarily).

* TheChosenOne: Sheen happens to be this for the monks of Shangri Llama, who regard him as "He who puts foot behind head".

* ComicallyMissingThePoint: In ''Maternotron Knows Best'', Robot Judy gives Sheen and Carl application forms. Sheen's question is "Jimmy falls in the playground and breaks his leg. What do you do?" His response: "Well that's a stupid question. They don't even tell you which leg it is."

* DrunkWithPower: When his intelligence is increased in ''Sheen's Brain''.

* GeniusDitz: He wrote the entire Ultra Lord website, which claims that he's the father of our country (and the whole planet).

Cindy's best friend and Sheen's girlfriend. The love of Libby's life? Music, the funkier the better. And she doesn't just listen, she also plays the keyboard, [=DJs=], and can throw a high note that would give most opera singers a run for their money.

* NiceMeanAndInBetween: The In-Between to Carl's Nice and Jimmy's Mean. He's the wackiest and most high-spirited guy of the group, but does have a bit of an ego like Jimmy and can often be a bad friend in certain circumstances.

* HeldBackInSchool: It's revealed in "Operation: Rescue Jet Fusion" that he's been in the same grade as his friends for a couple of years.

* JerkassToOne: While she's normally a fair and reasonable teacher to the rest of her students, she appears to have a particular enmity towards Sheen. Though considering that it's [[{{CloudCuckooLander}} Sheen]], [[JustifiedTrope you can imagine that there would be some valid reasons for why she considers him her least favorite student]].

* {{Flanderization}}: While he was a bit eccentric in the original movie, the show made him a straight-up {{cloudcuckoolander}}.

->Voiced by: Creator/JeffBennett

* MistakenForGay: While his orientation isn't known, Zix & Travoltron have this reaction to Tee wantimg to open up a dress shop as they glance at one another awkwardly & slowly back away from him.

* NiceGuy: Despite his shyness and rather eccentric personality, he's still the nicest of all the main characters.

* HeldBackInSchool: It's revealed in "Operation: Rescue Jet Fusion" that he's been in the same grade as his friends for a few years.

-->'''Real names:''' Hubert Beaumont Neutron

* NiceGuy: Despite his shyness and rather eccentric personality, he's definitely considered the nicest of all the main characters.

* ExtravertedNerd: An [[{{Cloudcuckoolander}} eccentric]] comic book-loving nerd.

* NiceGuy: Goddard is a good boy. He is lovable, constantly loyal to Jimmy, playful, kind, and just downright adorable.

* NiceGuy: Goddard is a good boy. He is lovable, constantly loyal to Jimmy, playful, kind, and just downright adorable.

* SpeaksFluentAnimal: Since their species is apparently reptilian, they can understand and speaks lizards' language. They use this ability to distract a T-rex from eating Jimmy and his friends.

* SpeaksFluentAnimal: They can only understand and speaks lizards' language, since they said they were in the same family as them. They used this ability to distract and send a T-rex away from eating Jimmy and his friends.

One of Jimmy's best friends who is obsessed with the fictional superhero Ultra Lord. He's a hyperactive, stupid, eccentric, loud, energetic, and geeky nerd.