1 - 20 of 689 Works in The Adventures of Jimmy Neutron: Boy Genius
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Christmas in Retroville by lexaleigh
Fandoms: The Adventures of Jimmy Neutron: Boy Genius
24 Dec 2025
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Summary
A collection of interconnected one-shots that can be read on their own, all taking place during the same Christmas season. Each one-shot will focus on a different character/couple—including minor characters! It’s tacky as hell and has so many Hallmark Christmas movie tropes I kinda wanna gag, but here we are.
More tags will be added as they become appropriate. Individual ratings will be placed in the notes section of each story, but the majority will fall within the Teen and Up rating. Each story is titled after a Christmas song.
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Calculus by Laineybug12
Fandoms: Fairly OddParents, The Adventures of Jimmy Neutron: Boy Genius, Danny Phantom, SpongeBob SquarePants (Cartoon), The Sims (Video Games), Nicktoons (Video Games)
23 Dec 2025
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Summary
A year out of high school and still stuck with a shitty job, Timmy Turner is bored out of his mind. He's resigned himself to his fate; that is, until he recieves a phone call from a long lost friend. Pulled into an adventure he'd never thought possible, he's confronted with new friendships, new feelings, and an unprecedented sense of danger. Can he learn to navigate all these new challenges, or will his past cause him to give up before he can really become a part of this team? And what the hell does calculus have to do with all this?!
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Nicktoons! Or how the Multiverse got shredded by four kids by 616mcu, HAZZARD_OVERFLOW
Fandoms: Nicktoons (Video Games), Danny Phantom, Fairly OddParents, Invader Zim, El Tigre: The Adventures of Manny Rivera, CatDog (Cartoon), SpongeBob SquarePants (Cartoon), My Life as a Teenage Robot, The Adventures of Jimmy Neutron: Boy Genius
23 Dec 2025
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Summary
We come about the tale of children with big hearts and cosmic power, that will save the universe! ... Or eat burgers, whatever comes first.
TV tropes Page!: https://tvtropes.org/pmwiki/pmwiki.php/Fanfic/NicktoonsOrHowTheMultiverseGotShreddedByFourKids
Series
- Part 10 of Every Spec of Dust Counts
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Home by katia_dreamer for rockstarmoron
Fandoms: The Adventures of Jimmy Neutron: Boy Genius
20 Dec 2025
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Summary
A late night in the Neutron-Vortex household.
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Meet The Nicktoon Universe by s10127470
Fandoms: Nicktoons (Video Games), SpongeBob SquarePants (Cartoon), The Adventures of Jimmy Neutron: Boy Genius, Fairly OddParents, Danny Phantom, My Life as a Teenage Robot, Avatar: The Last Airbender (Cartoon 2005), El Tigre: The Adventures of Manny Rivera, Tak (Video Games), Rugrats & All Grown Up! (Cartoons), Rocket Power (TV), Hey Arnold!, Invader Zim
17 Dec 2025
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Summary
Meet the heroes, villains and civilains of The Nicktoon Universe, the setting of my upcoming fanfic, “Nicktoons Re-Unite!”, coming this fall!
Series
- Part 1 of Nicktoons Re-Unite!
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Ever the Optimist by Ways for Scroogeyturtle
Fandoms: Nicktoons (Video Games), nickelodeon universe - Fandom, SpongeBob SquarePants (Cartoon), Danny Phantom, The Adventures of Jimmy Neutron: Boy Genius, Fairly OddParents, Glitch Techs (Cartoon)
16 Dec 2025
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Summary
Even in the most trying times, sometimes a little optimism can bring light back in the room.
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Nicktoons One-Shot fics by mel_fart
Fandoms: Nicktoons (Video Games), SpongeBob SquarePants (Cartoon), Danny Phantom, Fairly OddParents, The Adventures of Jimmy Neutron: Boy Genius
16 Dec 2025
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Summary
Sleepover with the Nicktoons Unite team <3
And something gay happens...
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Emails I Can, Should, and Must Send by messofthejess for rockstarmoron
Fandoms: The Adventures of Jimmy Neutron: Boy Genius
14 Dec 2025
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Summary
Jimmy and Cindy are geographically separated for the summer. Do you really think that's going to stop them from talking?
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only have a moment before it’s all over (a burning desire that cries again) by whisper_into_my_heart
Fandoms: The Adventures of Jimmy Neutron: Boy Genius, Fairly OddParents, Nicktoons (Video Games)
14 Dec 2025
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Summary
Jimmy Neutron has done his best to move on with his life after losing the love of his life to magic-induced amnesia ten years ago. So what if he hasn't had a real date with anyone in the past ten years? He didn't have time for romance anyway, between whipping up new inventions and raising his and Timmy's daughter. She is all that keeps him going, especially on the days when the void in his heart threatens to swallow him whole. If it hurts sometimes to look at her, he's only human. It doesn't mean he loves her any less.
So, of course, when he comes home one day to find out she's run away to another dimension, he proceeds to lose his shit.
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Timmy Turner is an average man, however much he might have wished otherwise. His parents noped out of his life the minute he turned eighteen, leaving him alone in a house haunted by loneliness. Sure, it would have been nice to have a family of his own, but he was fine with focusing on his career and the occasional one-night stand.
All that changes when a young girl appears at his door, claiming to be his long-lost daughter.
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The Boy Genius and the Delivery Boy by Teo Grey (TeoGrey), TeoGrey
Fandoms: The Adventures of Jimmy Neutron: Boy Genius, Futurama
11 Dec 2025
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Summary
A portal experiment gone wrong launches Jimmy and his friends into the 31st century and straight into Planet Express. Jimmy meets a future where his kind of genius is both everywhere and nowhere, Fry meets the kind of kid he never was, and the universe survives another day of bad ideas delivered at light speed.
- Language:
- English
- Words:
- 4,344
- Chapters:
- 1/1
- Hits:
- 16
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Jimmy Neutron: Encanto Genius by Skatoonyfan1234
Fandoms: Encanto (2021), The Adventures of Jimmy Neutron: Boy Genius
11 Dec 2025
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Summary
A Encanto & Jimmy Neutron Boy Genius crossover.
When Mirabel's door vanished on her gift ceremony, Alma asked her son Bruno to look into the future to see why. But the vision he had didn't show Mirabel in front of a cracked Casita. Instead, what it showed was A very different person - a boy with a big head, giant flying chickens, and monsters shaped like floating eggs, all of which he knows are NOT in the Encanto.
But the Madrigals NEVER expected 10 year old boy genius Jimmy Neutron, to enter their world, and in turn, end up on a mission with the kids to rescue all of Retroville's parents from evil aliens called the Yolkians.
Funny how things work out.
But will Jimmy, the Madrigals and the kids save Retroville's parents?
Will Mirabel see she's special as her family?
Will Jimmy understand how much family means to him and his friends?
And will they all learn important lessons along the way about family bonds that should never be torn apart?
You'll just have to read to find out!
[i do not own Encanto or Jimmy Neutron]
Series
- Part 18 of Totally Bonkers Crossovers
- Part 12 of My Encanto Stories
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A Holly Jolly Calamitymas by NekoBro900
Fandoms: My Life as a Teenage Robot, Helluva Boss (Web Series), Hazbin Hotel (Cartoon), Codename: Kids Next Door, Nicktoons (Video Games), Phineas and Ferb, Multi-Fandom, The Adventures of Jimmy Neutron: Boy Genius, SpongeBob SquarePants (Cartoon), Danny Phantom, Fairly OddParents
07 Dec 2025
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Summary
Octavia and the Uno Family go to attend a Christmas party at the town of Tremerton, sounds fun, right? Not when the Holiday Killer is running around!
(A follow-up to Operation Owlette, plus, a re-write of the my life as a teenage robot episode: "A Robot For All Seasons")
Series
- Part 8 of Cartoon Calamityverse: season 1
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Nicktoons: One Tooth More! by SkunkRaccoonSnake
Fandoms: The Angry Beavers, Nicktoons (Video Games), SpongeBob SquarePants (Cartoon), Danny Phantom, The Adventures of Jimmy Neutron: Boy Genius, Fairly OddParents
06 Dec 2025
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Summary
A full-on rewrite of Nicktoons: Unite! with one additional character. (Contains: Norb and SpongeBob's brotherly friendship.)
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Songs of The Flipper with Guest Stars by Skatoonyfan1234
Fandoms: The Backyardigans, Elena of Avalor (Cartoon), The Adventures of Jimmy Neutron: Boy Genius
05 Dec 2025
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Summary
title says all
i own nothingSeries
- Part 12 of Cartoon Characters and Backyardigans Songs
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Summary
Nick is secretly a good cook, a skill that only his boyfriend knows.
Series
- Part 17 of Decemburn 2025
- Language:
- English
- Words:
- 331
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 19
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My Unite Academia by Khvanitas003
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), Nicktoons (Video Games), The Adventures of Jimmy Neutron: Boy Genius, Danny Phantom, Fairly OddParents, SpongeBob SquarePants (Cartoon)
05 Dec 2025
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Summary
Due to a failed escape attempt by the Nicktoons during a mission in Japan, two of the Nicktoons end up captured by the heroes. The sentence? Enroll in UA and find a legal path to heroism. But are the Nicktoons' ways truly wrong, or is it that the circumstances are different for everyone?
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Fading by Anonymous
Fandoms: Fairly OddParents, The Adventures of Jimmy Neutron: Boy Genius, Nicktoons (Video Games)
04 Dec 2025
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Summary
Honestly, Jimmy had thought that Timmy would immediately freak out when he woke up from the memory wipe. It sounded like a reasonable reaction, and they had warned him it was the most common one. As much as if would be unpleasant then, it would be something expected. Of course, if anything related to the Timmy Turner was predictable, Jimmy's life would be just too easy, wouldn't it.
(He really regrets trusting 𝘵𝘩𝘦𝘮 that everything would go well and that 𝘵𝘩𝘦𝘺 wouldn't poke around in Timmy's brain like as if he was a dissected frog in biology class. It was supposed to be good, it was supposed to go smoothly, it was supposed to be just a change that Turner himself personally agreed to. They both believed that it was for the better. That it was the best option they had. He regrets trusting 𝘵𝘩𝘦𝘮 with Timmy.)
Series
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Nicktoon Re-Unite! Merchandising Ideas by s10127470
Fandoms: Nicktoons (Video Games), SpongeBob SquarePants (Cartoon), The Adventures of Jimmy Neutron: Boy Genius, Fairly OddParents, Danny Phantom, My Life as a Teenage Robot, Avatar: The Last Airbender (Cartoon 2005), El Tigre: The Adventures of Manny Rivera, Tak and The Power of Juju, Rugrats & All Grown Up! (Cartoons), Rocket Power (TV), Hey Arnold!, Invader Zim
04 Dec 2025
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Summary
Just a series of ideas for if Nicktoons Re-Unite was an actual animated series....and had tons of merchandising to go along with it.
Series
- Part 4 of Nicktoons Re-Unite!
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Tired of Being Sorry by rockstarmoron for katia_dreamer
Fandoms: The Adventures of Jimmy Neutron: Boy Genius
04 Dec 2025
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Summary
Who's there for you when the grief gets to be too much? That's what really matters.
Series
- Part 3 of Where You Go, I Go
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Cartoon Theater - The Nightmare Before Christmas by Skatoonyfan1234
Fandoms: The Nightmare Before Christmas (1993), Encanto (2021), Toy Story (Movies), Thomas the Tank Engine & Friends, Strange Hill High, Shrek (Movies), Elena of Avalor (Cartoon), Megamind (2010), Ratchet & Clank, Sly Cooper (Video Games), Crash Bandicoot (Video Games), Lady and the Tramp (Disney Animated Movies), Incredibles (Pixar Movies), The Adventures of Jimmy Neutron: Boy Genius, Inside Out (Pixar Movies)
03 Dec 2025
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Summary
The cast watches their next Movie, The Nightmare Before Christmas, and finds out why mixing two holidays together is a bad idea.
i own nothing except my oc
Series
- Part 6 of Skatoonyfan1234's Cartoon Cinema
- Part 11 of Reaction Stories