1 - 20 of 123 Works in Grim (Billy & Mandy)
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Krampus' Big Bet by nightmaster000, ZimsMostLoyalServant
Fandoms: Ben 10 Series, Kim Possible (Cartoon), Miraculous Ladybug, Danny Phantom, Invader Zim, Fairly OddParents, Grim Adventures of Billy & Mandy
18 Dec 2025
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Summary
For centuries, Santa Claus has been the icon of Christmas, a jolly figure who gives gifts to all the nice children of the world and punishes the naughty by only giving them coal. But there used to be another figure who handled punishments, and he was a lot harsher about it, so much so that Santa eventually drove him out... until now.
Krampus has returned, and he wants back in on the holiday. And to do so, he sets up a bet with Santa - using a new system of punishment he's devised, he will break some of the worst of the naughty list, and make them desire to be better and help out those on the nice list... in every way possible~
Will he succeed? Or will these naughty girls resist their punishments?
Series
- Part 75 of Mixing up ideas
- Part 25 of ZimsMostLoyalServant and nightmaster000 collaborations
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The Fusion Resistance Files by s10127470
Fandoms: Cartoon Network Universe: FusionFall, Dexter's Laboratory, Ben 10 Series, The Powerpuff Girls (Cartoon 1998-2005), Samurai Jack (Cartoon), Codename: Kids Next Door, Ed Edd n Eddy, Grim Adventures of Billy & Mandy, Foster's Home For Imaginary Friends, Life and Times of Juniper Lee, Megas XLR, Johnny Bravo (Cartoon), Johnny Test (Cartoon), The Secret Saturdays, Generator Rex, Exchange Student Zero (2012), The Marvelous Misadventures of Flapjack, Adventure Time (Cartoon 2010), Regular Show (Cartoon), Steven Universe (Cartoon), Supernoobs (Cartoon), Courage the Cowardly Dog, Total Drama (Cartoon), Robotboy (Cartoon)
06 Dec 2025
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Summary
Dexter, File 10292. These are the files of The Fusion Resistance, the group of heroes I brought together in order of battle the forces of Lord Fuse and his Fusion Army. These files cover our skills, personalities and weakness. For those who are reading them, don't let it leave your grasp. Because there are unfortunately many enemies of ours that would gladly take them and use it against us.
Series
- Part 1 of FusionFall: The Series
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2004 CCF episodes by WeAreHope345
Fandoms: Codename: Kids Next Door, Duck Dodgers in the 24 1/2th Century, Evil Con Carne, Dexter's Laboratory, The Powerpuff Girls (Cartoon 1998-2005), Grim Adventures of Billy & Mandy, Totally Spies, What's New Scooby-Doo? (Cartoon), Johnny Bravo (Cartoon), Mucha Lucha (Cartoon), Star Wars: Clone Wars (2003) - All Media Types, The King and I (1999), Pocket Monsters | Pokemon - All Media Types, Foster's Home For Imaginary Friends, Atomic Betty, Scary Godmother (Movies), Hamtaro (Anime), Hi Hi Puffy Amiyumi (Cartoon), Antz (1998), How the Grinch Stole Christmas (Cartoon 1966), Grandma Got Run Over by a Reindeer (2000), The Tangerine Bear: Home In Time For Christmas! (2000), Ed Edd n Eddy, I Am Weasel. (Cartoon), Samurai Jack (Cartoon), A Pup Named Scooby-Doo (Cartoon), Cow and Chicken (Cartoon), The 13 Ghosts of Scooby-Doo (Cartoon), What a Cartoon! (Cartoon), The Flintstones, Whatever Happened to Robot Jones?, Ozzy & Drix (Cartoon), Teen Titans (Animated Series)
30 Nov 2025
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Series
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My Father, The Reaper: Life With Death by DeadSquidWriter
Fandoms: Grim Adventures of Billy & Mandy
18 Nov 2025
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Summary
Bits and pieces of the daily life of the Grim Reaper and his adopted daughter. Basically these stories act as the prequel to the AU’s version of the actual show. Find out where Saliva came from, how Grim’s job works, and discover the emotional roller coaster that is being a single father.
Series
- Part 2 of My Father, The Reaper (GAOBAM AU)
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Mandy and the ever repeating by WowieLogicalFun
Fandoms: Grim Adventures of Billy & Mandy
27 Oct 2025
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Summary
Billy and Mandy is an episodic show, with characters forgetting past events, repeating years, and never aging. What happens when one of the protagonists starts to realize this? This is what this little fic explores. I hope I portrayed the characters as accurately as possible.
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Summary
Jack's fateful encounter with the Grim Reaper, from his point of view.
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Calamityverse: Frights of Guinevere by NekoBro900
Fandoms: Disney's House of Mouse (Cartoon), Hazbin Hotel (Cartoon), Codename: Kids Next Door, The Ghost and Molly McGee (Cartoon), Danny Phantom, Nicktoons (Video Games), Multi-Fandom, Foster's Home For Imaginary Friends, Grim Adventures of Billy & Mandy, My Little Pony Generation 4: Friendship Is Magic (Cartoon 2010), The Nightmare Before Christmas (1993)
15 Oct 2025
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Summary
It's Halloween at the House Of Mouse and more than just Disney characters of the multiverse are invited! But what happens when a troublesome imaginary friend and a pink ghost try spoiling the fun?
Series
- Part 4 of Cartoon Calamityverse: season 1
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The Grim Adventures of the Atoms by Snubnose490
Fandoms: Grim Adventures of Billy & Mandy
09 Oct 2025
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Summary
A collection of stories about Billy & Mandy's life as parents of five rowdy children. Chaos, Comedy, Drama, Horror, and all the little gross and beautiful things about being the parents of children who may be even worse about respecting the laws of the supernatural.
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Ten years after Grim dealt with a certain foolish prankster, he's starting to see the after affects of that night.
- Language:
- English
- Words:
- 206
- Chapters:
- 1/1
- Kudos:
- 4
- Hits:
- 44
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Summary
A Grim Day AU Grim meets the other grim reapers from around the world
Series
- Part 1 of Cartoon Network 2025
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A Coffee a Day Keeps the Bacon Away by KermitDeFrog12
Fandoms: Grim Adventures of Billy & Mandy
28 Sep 2025
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Summary
Fed up with Gladys' vengeful antics against him, Grim decides to strike a deal that could turn the tables.
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Summary
Very soon, Boogey's name travelled across the seven seas, striking fear in the hearts of poor sailors and expert privateers. He earned the nickname "Boogey" for one good reason: he was the Boogeyman of the waters. People sang shanties of his cruelty, scared others with tall tales of him around the fire, envied his riches, his successes, his power to seemingly having the most well-to-do families on his payrol, like they were nothing but puppets on strings to him.
But no man was invincible.
Sooner or later, Boogey would have to meet his match and adapt quickly-
Or else he too would meet a fate in the watery graves like many pirates before him.
- Language:
- English
- Words:
- 1,328
- Chapters:
- 1/1
- Kudos:
- 4
- Hits:
- 7
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Heroes of Townsville by MusouPrince
Fandoms: Cartoons - Fandom, Cartoon Network, nickelodeon - Fandom, Indie Animations, Live Action - Fandom
09 Sep 2025
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Summary
Heroes of Townsville takes place in an alternate universe where all of your familiar childhood settings (Endsville, the Cul-De-Sac, Genius Grove, etc.) are all apart of Townsville, the greatest culmination of both heroes and villains from your childhood nostalgia.
The main character is Jason Matthews, a stoic country boy moving into Townsville City from a small rural area in Minnesota after graduating from High School. Reason? You better read the story, ya goof. All I can tell you is that Jason moves into town along with his older brother and ends up meeting a cast of colorful students while attending Townsville University, ranging from a reaper tamer, super powered sisters, local geniuses, demonic entities and even visitors from beyond the stars.
Series
- Part 1 of Heroes of Townsville
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A Grim Start by Amanda Dread (RayAnn35)
Fandoms: Grim Adventures of Billy & Mandy, Grim Tales (Webcomic), Billy & Mandy's Big Boogey Adventure (Grim Adventures of Billy & Mandy), Amanda Dreas (Grim Adventures of Billy & Mandy)
24 Aug 2025
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Amanda Dread is the Lord of Horror ruling the desolate Endville with her former husband Grim held captive as Billy is hiding out as a refugee
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A Grim Start; The Real Story of hoe Mandy met Grim by Amanda Dread (RayAnn35)
Fandoms: Grim Adventures of Billy & Mandy
24 Aug 2025
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Summary
This my orign story of Mandy from Grim Adventures of Billy & Mandy alternate first meeting
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A Grim Trip to the Docto- Nurse? by Twlyer1234 for Phantom_OfTh3Arch1ve
Fandoms: Grim Adventures of Billy & Mandy
19 Aug 2025
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Summary
A trip to the doctor for the Grim Reaper has gone wrong, or rather, much better than what he was expected.
- Language:
- English
- Words:
- 1,405
- Chapters:
- 1/1
- Kudos:
- 3
- Hits:
- 22
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Fear & Death by Twlyer1234
Fandoms: Grim Adventures of Billy & Mandy, Grim Tales (Webcomic)
06 Aug 2025
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Summary
In a different reality, Grim fell in love with Mandy.
In a different reality, he married her.
In a different reality, Mandy ruled the Underworld with an iron fist.
But what if things went into a different direction?
What if the hand that Grim put a ring on belonged to the Boogeyman?
- Language:
- English
- Words:
- 4,802
- Chapters:
- 1/1
- Kudos:
- 6
- Hits:
- 94
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Cartoons vs Toon House by iDuckFics
Fandoms: Learning with Pibby: Apocalypse (Cartoon), The Powerpuff Girls (Cartoon 1998-2005), Adventure Time (Cartoon 2010), Regular Show (Cartoon), Grim Adventures of Billy & Mandy, Infinity Train (Cartoon), Villainous (Cartoon), Among Us (Video Game), Poppy Playtime (Video Game), Garten of Banban (Video Games), Sprunki
01 Aug 2025
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Summary
Hello, and welcome to my latest Pibby AU, Cartoons vs Toon House! This story takes place after the (sadly hypothetical) Pibby show, meaning the Darkness has been defeated by the time this takes place. But a content farm is threatening the cartoon universe, and threatening the integrity of cartoons and video games alike…
Special thanks to Connor Crawford, aka James Goosebumps and TerraTerraCotta for their feedback and help!
- Language:
- English
- Words:
- 4,893
- Chapters:
- 1/?
- Kudos:
- 6
- Hits:
- 245
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Iron and Glory by Nicccoll
Fandoms: Cartoon Network Universe: FusionFall, The Powerpuff Girls (Cartoon 1998-2005), Codename: Kids Next Door, Samurai Jack (Cartoon), Dexter's Laboratory, Adventure Time (Cartoon 2010), Grim Adventures of Billy & Mandy, Ben 10 Series, Chowder (Cartoon), Generator Rex, Foster's Home For Imaginary Friends, Ed Edd n Eddy, Sym-Bionic Titan, Megas XLR, Courage the Cowardly Dog, Toonami Total Immersion Event Series
25 Jul 2025
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Summary
After finally adjusting to the new timeline, Niles faces the invasion head-on. Free from the grip of Lord Fuse from his past, he must press onward and uncover his role in the Magic Tree’s prophecy. His strength and wit are pushed to their limits, but the Chemical X in his veins clouds his mind, making him question if he’s truly in control or if something else is guiding his fate.
Series
- Part 3 of Fusion, Iron, and Glory
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Summary
Billy and Mandy are growing up! But that doesn't mean they can't still have fun, right?