Underfist Against the aSTRoVaMPiReS » by SteveAtwater The long-awaited sequel to Underfist: Halloween Bash...is never coming out. Why? Because Cartoon Network didn't renew Maxwell Atoms's contract a decade ago. Instead, there's this: a fanfiction attempting to continue the story of Underfist. Join Irwin, Fred, Hoss, Jeff, and Skarr as they take on their biggest challenge yet: the aSTRoVaMPiReS!
K+, English, Humor & Supernatural, chapters: 10, words: 9k+, updated: 5/16 published: 4/19
2It's only for a week by JasonMyersX Mandy's archenemy Mindy is at it again, and this time she makes a dare with Mandy like no other before. Now, Mandy has to find a boyfriend in a week before Mindy does, otherwise she'll have to be the read headed girl's slave. Little does Mandy know, what comes out of it is an experience that will change her life forever. BillyXMandy. T now for language, M later for lemons.
T, English, Humor & Romance, words: 3k+, favs: 8, follows: 7, 3/15
1 Stupidity got us into this mess, but it will never get us out by PixieVenus Billy and Mandy never liked each other but, they also never, didn't like each other.
K, English, Friendship & Romance, words: 811, favs: 9, follows: 5, 3/1, [Billy, Mandy] Grim
1Grim Adventure of Billy and Mandy: Tough Love by King Of Nipples The story of how Mandy learns how to smile without ending the world.
T, English, Romance & Friendship, words: 1k+, 2/6, Mandy, Grim, Billy, Irwin
Unwanted Company by KenNan73888 Chael and his childhood maiden friend, Belle, visit his father castle. Not long, friends from different dimension comes along as well, to visit the castle and them. [MultiCrossover]
K+, English, Humor & Friendship, words: 1k+, 1/27, OC
Unforgotten Event by KenNan73888 One day, Billy and Mandy was fighting for Grim scythe when all of a suddenly, they were put under a curse. The curse cannot be undone, to what Grim had putted. The scythe been going crazy since Grim execution day. The day of that incident...
K+, English, Supernatural & Friendship, words: 1k+, 1/27, Mandy, Grim, Billy
Depression by tayrulez someone is depressed - future fic
T, English, words: 908, favs: 1, 12/31/2017, Mandy, Nergal Jr.
Billy and Mandy's Random Adventure by FunnyTina677 Based off the fanfic 'Flapjack and His Random Adventure.' Billy, Mandy, and Grim have a great time on a wonderful weekend day. But things go crazy when they go doing random things. Rated T for swearing, nudity, and of course randomness.
T, English, Adventure & Humor, words: 691, favs: 1, 11/8/2017
Web of Love by MasterMind13 A trip to the Underworld Forest leads to unexpected feelings. A GrimxVelma oneshot.
K, English, Romance & Hurt/Comfort, words: 1k+, favs: 3, 10/31/2017
Mind Over The Reaper by FunnyTina677 After Mandy is put on house arrest, Grim becomes a torch singer. A parody of "Mind Over Murder." Rated T for suggestiveness throughout and one bad word. Also for a middle finger. Sorry if you get offended.
T, English, Parody, words: 953, 10/26/2017, Mandy, Grim
2Underfist, The series » by Princess Regia Al Ever wonder what happened to Underfist after the movie? Read to find out! PS. Cartoon Network, please renew Maxwell Atoms's contract and make this a TV show!
K+, English, Adventure & Humor, chapters: 6, words: 4k+, favs: 6, follows: 3, updated: 8/30/2017 published: 7/31/2015
19Life In The Grim Adventures Of Billy And Mandy » by Warrior of Wrath So I died and now I'm a cartoon I have very little knowledge of. Add to that I'm a child and im being raised as the next heir to my father's legacy! What kind of weird situation am I in! Oh well ill just roll with it for now until I'm old enough to leave and live on my own, for ill interact with kids my age I guess. Hey, those two look decent enough! "HEY LETS BE FRIENDS!"
T, English, Supernatural & Adventure, chapters: 8, words: 23k+, favs: 32, follows: 22, updated: 8/24/2017 published: 7/8/2017, Mandy, Grim, Billy, OC
2 Forever and Eternity by Young Napoleon22 The road had been long, and in her early years the new Empress believed it wouldn't happen until she was well into the middle of her life, but that all changed the day of Mr. Sunggles tenth birthday. The day she met the Grim Reaper. An epilogue to the entire series. Warning: Character death. Surprise ending.
T, English, Adventure & Supernatural, words: 2k+, favs: 14, follows: 6, 6/5/2017, Mandy, Grim, Billy
9The Pros of Cons » by Bob the Flying Monkey The summer of their 15th year, Billy is sent to military school, leaving Mandy alone in Endsville without her 2 'bestfriends'. Junior steps up to take their place, and Mandy's heart.
T, English, Adventure & Romance, chapters: 8, words: 17k+, favs: 30, follows: 30, updated: 5/30/2017 published: 8/31/2008, [Mandy, Nergal Jr.] Nergal
3Mandy's crush by mauleyripper Mandy has a crush on someone. Can Grim help?
T, English, Romance & Friendship, words: 529, favs: 2, 1/28/2017
1 Un día más by AlenDarkStar Las mismas estupideces de siempre, los mismos problemas, no había nada diferente, solo era un día más.
K+, Spanish, Humor & Supernatural, words: 1k+, 12/16/2016, Mandy, Grim, Billy
2 Christmastime in Endsville by awabblertoday Christmastime comes for the Endsville Kids. All grown up now, and waiting for Papa Grim. Part 3 of my 45 days challenge.
K, English, words: 786, 11/11/2016
3Trepanation of People's Skulls by Orange Ratchet Based off the two minute college film pilot! Grim decides to give Billy and Mandy a trepanation of their skulls in hopes of making them feel lightheaded. Little does he realize that it only made Mandy more sadistic than normal! What will happen when Mandy takes Grim's scythe and uses it to gives other people trepanations? Only craziness and chaos will ensue!
T, English, Humor & Horror, words: 1k+, favs: 4, follows: 4, 5/4/2016, Mandy, Grim, Billy
Good Advice by The-Mighty-Third-Draft Maut is carrying a secret flame for his English co-star, the girl who plays Mandy in Grim Adventures. AU, Mandy/Grim (as Maut/Evie.)
T, English, Romance & Hurt/Comfort, words: 2k+, favs: 6, follows: 2, 4/29/2016, Mandy, Grim, OC
6Grim Stories » by The-Mighty-Third-Draft Grim X Mandy. Various (mostly) unrelated chapters of short fiction.
T, English, Romance & Drama, chapters: 5, words: 2k+, favs: 16, follows: 13, updated: 4/28/2016 published: 4/18/2016, Mandy, Grim
1 Grim and Velma floating with you by arvinsharifzadeh Parody from Fairly Oddparents, but with Grim and Velma version.
K+, English, Parody & Poetry, words: 294, favs: 1, 4/25/2016
The mask by physchokitten Another appearance from the mask that made Mandy into a demon. This time though she's older, and Grim and Billy have the foresight to run off leaving Junior to deal with the issue. One shot.
T, English, words: 973, favs: 8, follows: 4, 3/30/2016, [Mandy, Nergal Jr.]
10Es para toda la eternidad by Mabel14 ¿La muerte puede morir? Grim ha observado todos estos años a Billy y a Mandy, los ha visto crecer y madurar. Mandy es la gobernante del mundo, y sus amigos tendrán que convivir con el peligro que conlleva ser la cabeza de la dictadura mas grande que haya existido.
K+, Spanish, Angst & Drama, words: 2k+, favs: 9, follows: 11, 3/6/2016
5 The Play's The Thing by JCMorrigan A short comedic oneshot meant to read like your average episode of The Grim Adventures of Billy and Mandy. When the school play finds itself in need of a director, Billy and Mandy know just who to call...but everyone else thinks they do too.
K+, English, Humor, words: 7k+, favs: 7, follows: 3, 2/12/2016