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Minami American General Highschool - New Beginning by maken.bialy2 reviews
After leaving BC Freedom Academy because of it's toxicity, Andou had to find a new answer to the troublesome necessity of finding herself a highschool. And what place could be the answer if not ambitious highschool far away south with talented students, questionably powerful leader and new Sensha-do team being created from leftovers? (AU after Das Finale)
Crossover - Girls und Panzer/ガールズ&パンツァー & Undertale - Rated: M - English - Adventure/Friendship - Chapters: 30 - Words: 69,587 - Reviews: 1 - Favs: 5 - Follows: 4 - Updated: 3h - Published: 4/2 - [Andou, OC] Eclair, Rosehip
Frisk Dearborn: Year One by XeroFresh
With the Monsters being released from the Underground by demand from the Wizarding World, Voldemort has gone on a killing spree vanquishing everyone in his path… except one. Her name was Frisk Dearborn and she was known to the public as the Girl Who Lived.
Crossover - Harry Potter & Undertale - Rated: T - English - Fantasy/Humor - Chapters: 1 - Words: 1,027 - Follows: 1 - Published: 23h - Albus D., Severus S., Frisk, Sans
Devilish Fortune by Burning burning burning reviews
Years pass, things change, but all stays the same. Vergil finds himself in a city ruled by the whims of men in search for his brother Dante, a city where no one can see eachother. There exists a plot to enslave every man woman and demon in this city, and he intends to reveal it to everyone. Sequel to a Devil May Fall, second story of trilogy(?)
Crossover - Devil May Cry & Undertale - Rated: M - English - Adventure/Supernatural - Chapters: 19 - Words: 94,277 - Reviews: 27 - Favs: 42 - Follows: 55 - Updated: 12/6 - Published: 7/31 - Vergil, Mettaton Ex, Credo, Napstablook
Worlds above the Underground (Rewrite) by bopdog111 reviews
(Rewrite of Ulrich's idea) Frisk Dreemurr did the impossible and freed the monsters from their prison under Mt. Ebott. She saved all of monster kind and even went the extra mile to try and bring back Chara and Asriel and succeeded. Now on the Surface the three Dreemurr children have a new goal, becoming three great Entertainment Duelists. Co-Write with Ulrich362
Crossover - Yu-Gi-Oh! Arc-V & Undertale - Rated: T - English - Suspense/Adventure - Chapters: 18 - Words: 107,848 - Reviews: 2 - Favs: 20 - Follows: 22 - Updated: 12/5 - Published: 2/8/2021 - [Yuya S., Frisk] [Yuzu H., Asriel]
WindWalker Determination by TwilightDawnRider
Compa and Iffy were discovering a new mountain called mount Ebbot but they wind up falling into the cavern where the monsters reside. Would they have to fight to get free, or are these monsters not like the ones in Gamindustri? Will the folks in Gamindustri try to save them? Is there a dark secret in these Caverns? Will the two girls know what to do when the time comes?
Crossover - Hyperdimension Neptunia & Undertale - Rated: T - English - Humor/Friendship - Chapters: 1 - Words: 470 - Published: 12/4 - Compa, IF, Frisk, Sans
Thorned Dreams by Thatguywholikesfood
Friendship with Susie and Ralsei secured, Dark World saved, Kris is feeling ecstatic. Why, in their opinion, the only way it could be better is if Asriel returned from University early. Then, somehow, they find that coming true too. Things are finally starting to look up for Kris, so everything's going to be just perfect now, right? An AU DR/UT crossover with some angst and fluff.
Crossover - Undertale & Deltarune - Rated: T - English - Angst/Hurt/Comfort - Chapters: 1 - Words: 1,524 - Published: 12/4 - Flowey, Asriel, Kris Dreemurr, Susie
Sans Trip Dream by BirdWatcher2
I had a dream a back in Aug 22nd, and I thought now I'd go ahead and post it. I've been super busy recently with school, and I haven't been able to finish the next chapter of An Underground Trip yet, so here's a little something to tide you over. Here's my dream, just how it happened. And by the way, there's a pun in the title. Enjoy!
Crossover - Percy Jackson and the Olympians & Undertale - Rated: K+ - English - Adventure/Humor - Chapters: 1 - Words: 283 - Published: 12/2 - Percy J., Sans - Complete
Maybe I'll Wait by MelonThePhrog
This is my first story on FanFiction, right now, it's a oneshot, but that may change if I get motivated to write something. Rated T for use of one or two swears.
Crossover - Wings of Fire, Tui T. Sutherland & Undertale - Rated: T - English - Friendship/Romance - Chapters: 2 - Words: 845 - Updated: 12/2 - Published: 11/29 - [OC, OC]
Loudertale the series by Loudcrowd111 reviews
After completing the 2 main Undertale routes. Lincoln isn’t the same person anymore. As something happens to him that even slightly changes his appearance. How will his sisters react? Will they accept him for having determination powers after being gone for so long?
Crossover - Loud House & Undertale - Rated: T - English - Adventure/Suspense - Chapters: 6 - Words: 24,603 - Reviews: 13 - Favs: 16 - Follows: 19 - Updated: 12/1 - Published: 9/4 - Lincoln L., OC
A Rabbit In The Underground by SbOcean reviews
The Underground had seen an incalculable number of resets. Frisk, Sans and Flowey are tired of each reset, but in one reset, two new people fall into the Underground. Will these two break the cycle or will they become a part of it?
Crossover - Five Nights at Freddy´s & Undertale - Rated: T - English - Horror/Family - Chapters: 12 - Words: 16,509 - Reviews: 10 - Favs: 22 - Follows: 26 - Updated: 12/1 - Published: 5/19 - Vanny/Reluctant Follower, Gregory, Frisk, Sans
King Under The Mountain vs Legendary Dark Knight by W1lvern0mega
I think I’m high rn lmao
Crossover - Devil May Cry & Undertale - Rated: T - English - Fantasy/Supernatural - Chapters: 1 - Words: 1,796 - Published: 11/30 - Sparda, Asgore D., Frisk - Complete
World's Collide-Play to Win by sen whitefox mako red demon
It's knucklebones night and the group have a new player joining for the night. Appearance wise he looks harmless, being a yellow flower and all. But his ruthless playstyle and shit talking leave a lot to be desired. But...can he handle all of the competition? What about the champion of the table?
Crossover - Undertale & Cult of the Lamb - Rated: T - English - Humor/Drama - Chapters: 1 - Words: 1,520 - Favs: 1 - Published: 11/28 - Flowey, Lamb, Ratau - Complete
Cyber Guardian: Origins by SteveM7 reviews
Frisk Launtee, an 18 year old kid from Glasgow, wakes up with newfound powers in a world where fictional characters, from a couple of video games he's played recently, are real. While in this world, his past, present and future will change him as he uncovers the true reasons why he woke up in another world. Part of Project Guardian Cyber Phase 1. [Restarted in 2022]
Crossover - Undertale & Doki Doki Literature Club - Rated: T - English - Supernatural/Sci-Fi - Chapters: 1 - Words: 5,196 - Reviews: 1 - Favs: 3 - Follows: 4 - Updated: 11/28 - Published: 11/28/2019
Sucktale by Ironsnake345 reviews
A story we're all familiar with, the story of Undertale - only Frisk is replaced with Suction Cup Man.
Crossover - Misc. Cartoons & Undertale - Rated: M - English - Humor - Chapters: 1 - Words: 2,588 - Reviews: 1 - Published: 11/27
The Fallen Frankenstein by hamsterbaxter reviews
Everyone calls Victor's creation a monster, so the creation decides to come to Mount Ebott. (Might end up being a one shot.)
Crossover - Frankenstein & Undertale - Rated: T - English - Chapters: 3 - Words: 2,909 - Reviews: 8 - Favs: 9 - Follows: 6 - Updated: 11/23 - Published: 2/7/2021 - Frankenstein Monster
Sin Trigger by Burning burning burning reviews
"The heart of man will always be dark. There will always be evil people. The problem is that there is nothing we can humanly do to change them." -Leon Bridges (Sequel to Devil May Fall and Devilish Fortune)
Crossover - Devil May Cry & Undertale - Rated: M - English - Supernatural/Friendship - Chapters: 1 - Words: 5,954 - Reviews: 1 - Favs: 3 - Follows: 5 - Published: 11/22 - Dante, Vergil, Chara, Asriel
Magnum's Tales by Strix36
The end of the world of war... and the Beginning story of Magnum to rebuilds her homeland, after the World War III... the unexpected thing is... that she wasn't born as a human anymore... (WARNING! THERE'S A LOT OF BAD WORDS! AND ITS NOT A GOOD STORY!)
Crossover - New World Order & Undertale - Rated: T - English - Tragedy/Supernatural - Chapters: 2 - Words: 335 - Updated: 11/20 - Published: 9/23 - Gaster, OC, Sans, Papyrus
Undertale watch Chainsaw man by H E L L 2 U reviews
Undertale crew are in some weird theater and have to watch an anime called chainsaw man (My first story and have to use my imaginary writing skills for this first try )
Crossover - Undertale & Chainsaw Man/チェンソーマン - Rated: M - English - Humor/Supernatural - Chapters: 1 - Words: 694 - Reviews: 1 - Favs: 13 - Follows: 14 - Published: 11/17 - Sans, Toriel, Papyrus, Undyne - Complete
MoniTale by Joker the prince of all crime reviews
"This was never meant to happen, you should have just brought them back." Player said as he went to delete her , but then something caught his eye. The Monika lover smiled as he looked at the Heart. "Maybe you can still learn." He moved her file over to UNDERTALE and opened it's files. He was finding a spot to put her, hovering over Frisk's. Then the lightning struck them..
Crossover - Undertale & Doki Doki Literature Club - Rated: T - English - Adventure/Hurt/Comfort - Chapters: 23 - Words: 92,162 - Reviews: 155 - Favs: 212 - Follows: 268 - Updated: 11/14 - Published: 2/21/2018
Golden Flowers Fill My Dreams by Endralis reviews
Ruby Rose recognized that person in the tree. They certainly stood out with their disheveled hair, tattered yellow and green shirt and sharp red eyes; yet she couldn't place where she had seen them before. They also had a strange name, and coming from a family with names like theirs that was saying something. Really, who names their child Chara? What kind of color is that?
Crossover - RWBY & Undertale - Rated: T - English - Mystery/Friendship - Chapters: 2 - Words: 14,548 - Reviews: 3 - Favs: 14 - Follows: 18 - Updated: 11/14 - Published: 10/8 - Ruby R., Yang X.L., Chara, Flowey
UD: A Restless Dreemurr by The Doc K
How long had it been since she last slept? How long had it been since she went down this path of atonement? How many more of her own self must she bury, before the genocides cease? All she needs to do is look at the stick on her hip, and the LOVE-less Dreemurr knows she can't stop; not now, not ever.
Crossover - Undertale & Deltarune - Rated: T - English - Suspense/Supernatural - Chapters: 1 - Words: 1,128 - Favs: 2 - Follows: 4 - Published: 11/9 - Chara, Kris Dreemurr, Susie
Hazbintale by TheShade18 reviews
Who knew dying could offer new possibilities to monsters? Or more like a second chance like humans have? Now, it sounds cool if only it wasn't for the fact that I have been transported to Hell... as a Human itself. And why is this other smiler so interested in me? Oh well, at least it's a beautiful day outside.
Crossover - Undertale & Hazbin Hotel - Rated: M - English - Adventure - Chapters: 4 - Words: 12,549 - Reviews: 45 - Favs: 96 - Follows: 128 - Updated: 11/9 - Published: 5/7 - Sans, Alastor, Charlie, Blitzo
The Mountain of two Legends! by bopdog111
Frisk succeeded in freeing the Underground from the Barrier, and all is freed back to Tamriel... too much they see is wrecked with strife from the Thalmor, and now a Dragon Menace. Teamed up with Jin, a former Soldier of the Imperial Empire, and the fated Dragonborn, they all travel to stop the Dragon Meance, and the Thalmor in a unlikely alliance. (Pairings Undecided)
Crossover - Elder Scroll series & Undertale - Rated: T - English - Family/Adventure - Chapters: 8 - Words: 40,826 - Favs: 5 - Follows: 5 - Updated: 11/8 - Published: 6/30 - Dragonborn/Dovahkiin, Delphine, Frisk, Chara
Unwavering Will in the Sea by dafid1 reviews
What if Frisk from Undertale went to the world of One Piece? See what happens as Frisk goes on a new adventure!
Crossover - One Piece & Undertale - Rated: K+ - English - Adventure/Friendship - Chapters: 61 - Words: 90,663 - Reviews: 45 - Favs: 178 - Follows: 185 - Updated: 11/6 - Published: 11/28/2020 - Luffy, Frisk
The Eight-Legged Bootlegger! by MULTUS reviews
Muffet D. Baker, a Spider-Girl in a world where there are pirates, ability-giving fruits, government oppression, and infinite islands must strive and try her hardest to claim the title Queen of The Pirates by finding the treasure that W. D. Gaster left! Collecting crewmates on her voyages, she will make sure that her extinct race may someday flourish. That is her wish as a pirate!
Crossover - One Piece & Undertale - Rated: M - English - Adventure/Fantasy - Chapters: 68 - Words: 378,947 - Reviews: 1 - Favs: 14 - Follows: 17 - Updated: 11/6 - Published: 2/8 - Frisk, Sans, Muffet, Gaster
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