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Rivers and Roads by
Miss Momolo reviews
Mandy had plans of conquering the world, but one day Billy moved away and everything changed. Stopped. Live kept moving forward and nothing was ever quite the same. Years later, Billy moves back and misadventures ensued.
Rated: T - English - Humor/Hurt/Comfort - Chapters: 1 - Words: 7,324 - Reviews: 12 - Favs: 29 - Follows: 27 - Published: 1/31/2021 - [Billy, Mandy] Grim, Irwin
angry Luigi saves Christmas by
Angry9guy reviews
when Santa turns into a vampire Billy and Mandy team up with angry Luigi and alem tuber to find the main vampire
Rated: K+ - English - Adventure/Humor - Chapters: 8 - Words: 1,778 - Reviews: 1 - Favs: 2 - Follows: 1 - Updated: 12/22/2020 - Published: 6/11/2020 - Billy, Grim, Mandy, OC
KidsWBYungsta's Battle for the Animation Multiverse: Billy and Mandy by
KidsWBYungsta
What starts out as just another regular day in Endsville turns into one of adventure for Grim, Billy and Mandy when they find themselves in the middle of another multiversal takeover plot led by Aku and Vilgax! Just like before, the two-headed robot is looking for heroes, but Grim, Billy and Mandy decide to test the robot's worthiness in the best way they know how.
Rated: K+ - English - Humor/Adventure - Chapters: 1 - Words: 3,472 - Published: 11/3/2020 - Mandy, Grim, Billy - Complete
for my friends by
Angry9guy reviews
when Billy fights with Jeff he now has a choice go home or save his friends based on wrath of the spider queen
Rated: K - English - Friendship/Adventure - Chapters: 1 - Words: 64 - Reviews: 2 - Published: 6/25/2020 - Billy - Complete
LJ and Zofia's Big Boogey Adventure by
PerkyGoth14 reviews
Much to their strong dismay, LJ and Zofia have to go to the Underworld with Billy, Mandy, and Grim when the death reaping skeleton is sentenced to court for misusing his powers and the Boogeyman takes him to court. When Grim's powers are soon taken from them, they are told about Horror's Hand which can make one's fears come alive and Boogeyman intends on taking it for himself.
Rated: K+ - English - Horror/Adventure - Chapters: 8 - Words: 21,860 - Reviews: 4 - Favs: 12 - Follows: 7 - Updated: 4/1/2020 - Published: 3/28/2020 - Mandy, Grim, Boogey Man, OC - Complete
Back to the Past by
pinkamena426 reviews
Billy and Mandy realize they have old versions of themselves from 1998 and go to visit them. Grim realizes that he's better off with the normal Billy and Mandy.
Rated: K+ - English - Humor - Chapters: 4 - Words: 830 - Reviews: 2 - Favs: 3 - Follows: 4 - Published: 3/27/2020 - Mandy, Grim, Billy - Complete
Sonny by
RitzyGreen reviews
When Junior first came to the surface world, he stole the appearance of a young boy at winter camp. In doing so, he unknowingly tore that boy's family apart. OC centric
Rated: T - English - Angst/Horror - Chapters: 1 - Words: 4,194 - Reviews: 2 - Favs: 7 - Follows: 2 - Published: 3/19/2020 - Nergal Jr., OC - Complete
Billy's Inferno by
Darkzz009 reviews
Billy's life was at peace since he left Endsville few years ago. But an old friend returns and soon his peace would shatter as he brought a devastating news. Mandy was taken to hell by the Devil. with his Scythe and guidance from Grimm. they raced against time to save Mandy. based on the timeless story 'Inferno' by Dante Alighieri reimagined into the world of Billy and Mandy
Rated: M - English - Adventure/Supernatural - Chapters: 1 - Words: 1,187 - Reviews: 3 - Favs: 6 - Follows: 4 - Published: 1/22/2020 - [Billy, Mandy]
Underfist, The series by
Princess Regia Al reviews
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!
Rated: K+ - English - Adventure/Humor - Chapters: 6 - Words: 5,313 - Reviews: 3 - Favs: 8 - Follows: 4 - Updated: 1/16/2020 - Published: 7/31/2015
Fundamentals of a relationship by
ecwecwecw1 reviews
Billy and Mandy are in High School now. While some parts of there relationship has changed, the Fundamentals are still the same. BillyxMandy, one shot.
Rated: T - English - Humor/Romance - Chapters: 1 - Words: 4,519 - Reviews: 7 - Favs: 52 - Follows: 19 - Published: 12/8/2019 - [Billy, Mandy] Grim, Mindy - Complete
Chaotic love by
Some random story teller
Eris the goddess of chaos decided to add a little romance to the mix of her chaotic shenanigans, seeking to bang the sexiest females in Endsville. WARNING: CONTAINS FUTA ON FEMALE ACTION
Rated: M - English - Romance/Humor - Chapters: 1 - Words: 1,396 - Favs: 1 - Follows: 2 - Published: 10/27/2019
LJ and Zofia's Jacked Up Halloween by
PerkyGoth14 reviews
LJ, Zofia, and their friends come to celebrate Halloween with Billy and Mandy. However, not all is well when Grim tells them the story about a prankster known as Jack O. Lantern who lived in ancient times, causing tricks for people. Due to Billy's stupidity, he comes back and takes Grim's scythe to make it Halloween night forever so he can conquer the world.
Rated: T - English - Supernatural/Horror - Chapters: 5 - Words: 16,059 - Reviews: 1 - Favs: 9 - Follows: 7 - Updated: 10/7/2019 - Published: 10/6/2019 - Mandy, Jack, Billy, OC - Complete
Dreams of Darkness by
Treacle Parcheesi reviews
As they settle into married life, Nergal decides to reveal to Sis the story of how he grew up and how he came to be banished from the Underworld. In the meantime, the powers that be threaten their future ... a future Sis is keeping a secret for now.
Rated: K+ - English - Romance/Friendship - Chapters: 1 - Words: 2,648 - Reviews: 4 - Favs: 1 - Follows: 1 - Published: 9/14/2019
Billy x Mandy by
Jigsaw1234 reviews
A three part love story about Billy and Mandy, where Mandy's parents are out of town for a month. And she stays with Billy and his family; and the two find out they have a lot more in common than they thought and that they've had secret feelings about each other for years. Set 7 years after the final season characters are 16 to 17 hope you enjoy please review M for sex.
Rated: M - English - Romance - Chapters: 1 - Words: 1,605 - Reviews: 4 - Favs: 17 - Follows: 10 - Published: 7/28/2019 - [Billy, Mandy] Grim
Underfist v Irwin Family Reunion by
SteveAtwater
They've faced down an evil marshmallow bunny, squid attackers from the underworld, aSTRoVaMPiReS, and spiders. They've grown close...er. They're accepted as Earth's heroes...kind of. But now, Underfist faces its greatest challenge yet...the judicial system!
Rated: K+ - English - Humor/Supernatural - Chapters: 10 - Words: 12,538 - Updated: 6/14/2019 - Published: 5/27/2019 - Complete
The Grim Adventures of Billy and Mandy: The betrayal of friendship by
AnimeEgirl reviews
Mandy was screaming upstairs, so Grim sent Billy to check what was happening to her. What Billy saw would change him forever, and it would all according to Grim's master plan. What happened to Mandy? What did Billy see? What was Grim's master plan? Find out by reading this amazing story about the loss of friendship and the start of something new.
Rated: M - English - Friendship/Romance - Chapters: 1 - Words: 1,226 - Reviews: 6 - Favs: 3 - Follows: 2 - Published: 5/30/2019 - Complete
Broken Happiness by
SomeRandomPerson99 reviews
After an injury to his head Billy starts to question his life and those around him. He starts to wonder if he can really be happy again now that he is ironically now just not stupid enough to realize how little it all seems to mean to him now. Mandy, on the other hand isn't going to settle for it and Eris has plans of her own.
Rated: M - English - Drama/Romance - Chapters: 1 - Words: 1,930 - Reviews: 4 - Favs: 20 - Follows: 25 - Published: 5/3/2019 - Mandy, Grim, Billy
LJ and Zofia and the Wrath of the Spider Queen by
PerkyGoth14 reviews
LJ and Zofia start going to school with Billy and Mandy, but luckily, their friends Dib, Gaz, Nergal Jr, Kimberly, Chrissy, and even Akito and Estelle will be going with them. It's not a very good first day of class though since there's a spider infestation, and it turns out that the school is going to be held for the Spider Queen for her revenge against the Grim Reaper.
Rated: K+ - English - Drama/Supernatural - Chapters: 6 - Words: 13,328 - Reviews: 1 - Favs: 5 - Follows: 3 - Published: 3/18/2019 - Mandy, Grim, Billy, OC - Complete
The Grim Resistance Save Christmas by
Nitro Booster
It's Christmas Eve, and everybody is waiting for Santa. Only one problem; Santa's been kidnapped by Mandy. Now Billy and Grim must hurry to save Santa Claus and Christmas before it turns into Bah Humbug.
Rated: M - English - Parody/Humor - Chapters: 3 - Words: 1,665 - Published: 11/30/2018 - Mandy, Grim, Billy - Complete
Rock-a-Bye Pinhead by
Nitro Booster reviews
Based on the SpongeBob episode "Rock-a-Bye Bi-Valve": Billy and Mandy are older now, and find an abandoned child. With no one to take care of him, Billy and Mandy decide to raise him as their own. But with Billy constantly working and never giving Mandy her break, tempers start flaring around the odd couple. This fanfiction is only BillyxMandy if you want it to be.
Rated: K+ - English - Parody/Humor - Chapters: 2 - Words: 1,867 - Reviews: 2 - Favs: 3 - Follows: 3 - Published: 11/8/2018 - [Billy, Mandy] - Complete
TGR - S1 E10: Revenge of the Resistance (Part 2) by
Nitro Booster
Billy defeats Mandy, and she is now ashamed of showing her face. Billy returns home to inform the good news, but Mandy is not finished yet.
Rated: M - English - Parody/Humor - Chapters: 1 - Words: 334 - Published: 10/21/2018 - Mandy, Grim, Billy - Complete
TGR - S1 E8: Plan B by
Nitro Booster
Billy confronts Mandy, and gets tossed. He and Grim then make a run for it. They run into the bar and encourage everybody there to create a diversion.
Rated: M - English - Parody/Humor - Chapters: 2 - Words: 523 - Published: 10/20/2018 - Mandy, Grim, Billy, OC - Complete
TGR - S1 E7: At Just the Right Time by
Nitro Booster
Mandy now has the entire world covered with her troops, but Billy doesn't give up. He and Grim re-enter the factory, where Billy uses a special device to shut the power down. This unfortunately leads to the group splitting up, giving Mandy a chance to take a few of them.
Rated: M - English - Parody/Humor - Chapters: 3 - Words: 624 - Published: 10/20/2018 - Mandy, Grim, Billy - Complete
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