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DoubleTale: When Devils Cry by lmao-imdeadaf reviews
21 iterations of W.D Gaster each brought a child with unlimited potential through from our world to theirs. These are the ones we know of. Somewhere, not too far from The Angel's own 'verse, another child is brought in, along with a few other…things. (Or, I'm a nerd so I inserted myself into a DT fic with DMC crap.) / ON HIATUS DUE TO PERSONAL SHIT - WILL CONTINUE AS SOON AS ABLE
Crossover - Undertale & Devil May Cry - Rated: T - English - Humor/Fantasy - Chapters: 5 - Words: 8,670 - Reviews: 1 - Favs: 2 - Follows: 3 - Updated: 1h - Published: 1/16 - Frisk, OC, Sans, Chara
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: 67 - Words: 369,558 - Reviews: 1 - Favs: 13 - Follows: 16 - Updated: 22h - Published: 2/8 - Frisk, Sans, Muffet, Gaster
Titantale by Kaiju Enjoyer reviews
Frisk has freed the monsters from the underground, and a new era is about to begin. But the monsters are about to return to a world very different from the one they left when they were imprisoned. A world that has changed the moment humans learned a thing that the monsters will learn too: that this world always belonged to Godzilla, and that humans and monsters just lived in it.
Crossover - Godzilla & Undertale - Rated: T - English - Adventure/Fantasy - Chapters: 1 - Words: 1,797 - Reviews: 1 - Favs: 6 - Follows: 7 - Published: 9/16
republictale: uncharted wasteland by bigswaggy123
a couple weeks after the continent warped into their realty the throupel were spending their time before they left . now with a war on their hands they set out with the 2 stand users who warped into their world Okusayu and Josuke to explore this continent.( mainly undertale but mlp , Jojos bizarre adventures, fallout) ( art by /users/w3ndig0
Crossover - My Little Pony & Undertale - Rated: M - English - Romance/Drama - Chapters: 28 - Words: 52,245 - Favs: 1 - Follows: 1 - Updated: 9/16 - Published: 3/30/2021 - [Alphys, Sans, Undyne] Frisk
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: 2 - Words: 10,444 - Reviews: 3 - Favs: 7 - Follows: 10 - Updated: 9/15 - Published: 9/4 - Lincoln L., OC
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: 22 - Words: 87,315 - Reviews: 150 - Favs: 207 - Follows: 258 - Updated: 9/15 - Published: 2/21/2018
Paranormal Academia (Version réécrite) by MonstaLia reviews
La vie de Léa change du tout au tout quand des monstres surgissent de nulle part pour l'attaquer et qu'elle se retrouve contrainte de vivre dans une académie loin des humains.
Crossover - Slender & Undertale - Rated: M - French - Adventure/Horror - Chapters: 31 - Words: 115,990 - Reviews: 1 - Updated: 9/15 - Published: 2/7/2020
An Underground Trip by BirdWatcher2 reviews
This is a story about Percy Jackson, after all his adventures in the books, falling into the world of Undertale, and going through some of that journey. In this world, Frisk does not fall down, Percy does. I do not specify how, and I may or may not specify in the future. How will Sans react to Percy Jackson and his insanely high level? And how will Percy respond to Sans? We'll see.
Crossover - Percy Jackson and the Olympians & Undertale - Rated: K+ - English - Humor/Angst - Chapters: 9 - Words: 14,953 - Reviews: 1 - Favs: 8 - Follows: 14 - Updated: 9/14 - Published: 8/6 - Percy J., Sans, Toriel
Arc-Tale by King-Mac-11 reviews
Jaune Arc climbed a mountain outside his home village. He fell into the famed mountain. Now he needs to find a way out. But things are rarely easy, so he has to take on an odd gauntlet within Mount Ebott. Monsters aren't always Grimm, and not always bad either. All he can do now... is remained Determined.
Crossover - RWBY & Undertale - Rated: T - English - Adventure/Fantasy - Chapters: 6 - Words: 22,658 - Reviews: 57 - Favs: 187 - Follows: 209 - Updated: 9/12 - Published: 3/18 - Jaune A., Undyne, Toriel, Asgore D.
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: 25 - Words: 60,222 - Reviews: 1 - Favs: 5 - Follows: 4 - Updated: 9/12 - Published: 4/2 - [Andou, OC] Eclair, Rosehip
A Purge Above the Ground: The Official Sequel by Ginger the Barn Owl reviews
Peace has reigned since Monsters and Pure Ones allied, but tensions erupt when a group of humans called the Preservers threatens genocide against monsters in the name of humanity. As both owl and monster fight to stop them, Ginger, Asriel and the others begin to unravel monsterkind's vague origins...Something key to their lives beyond the mortal realm.(Co-written by TimeBlade-NEO.)
Crossover - Legend of the Guardians: The Owls of Ga'Hoole & Undertale - Rated: T - English - Fantasy/Crime - Chapters: 5 - Words: 12,510 - Reviews: 4 - Favs: 4 - Follows: 2 - Updated: 9/9 - Published: 9/5/2020
SnAns and read Riding hood sace the e with Nostalgia Crittc by MrTheB reviews
This sotory has unintentional duaguise vore, Napolean Bonapaet speaking english ,mental issues, crowdfunded warships, dark but not evil Peter Griffin, plastic guns, santaclause , hewvyjanded shipping, Apollo Justice, emotioanl truama from DDLC (this was written in 2019.),and sasquaches brutal death. AND DOCTOR CHIEMRA!
Crossover - Little Red Riding Hood & Undertale - Rated: T - English - Humor/Parody - Chapters: 11 - Words: 10,436 - Reviews: 1 - Updated: 9/8 - Published: 7/5 - 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. Joined in by his demonic allies, Vergil continues his journey... His journey to become human
Crossover - Devil May Cry & Undertale - Rated: M - English - Adventure/Supernatural - Chapters: 5 - Words: 19,202 - Reviews: 12 - Favs: 29 - Follows: 47 - Updated: 9/7 - Published: 7/31 - Vergil, Mettaton Ex, Credo, Napstablook
Digitale by Razorwolfie
A crossover fanfiction of Digimon and Undertale, I have been thinking about this for a long time, so I decided to make this fanfic. This also happens to be my first fanfic so it's probably not that good, but I hope you enjoy it regarless.
Crossover - Digimon & Undertale - Rated: T - English - Adventure/Fantasy - Chapters: 1 - Words: 9,824 - Published: 9/3 - [Lunamon, Shoutmon] Toriel, Flowey
Corpse And Decay by Anime0CC0Manga
The Minus Among Minuses And The Cute Loveless Has Taken Quite The Fall Underground (I Own Nothing)
Crossover - Medaka Box/めだかボックス & Undertale - Rated: K - English - Adventure/Fantasy - Chapters: 1 - Words: 1,124 - Favs: 2 - Follows: 2 - Published: 9/2 - M. Kumagawa, Mukae E., Papyrus, Sans
Sonic in Undertale by Archaeopteryx108
(This is a work in progress. I own nothing. Sonic is owned by SEGA, and Undertale is a product of Toby Fox.) When a blue hedgehog that can go faster than the speed of sound and a small child fall into a mountain… they will find something quite unexpected… This is a version of the Pacifist Route with Sonic in it. I will upload infrequently. Review if you enjoy!
Crossover - Sonic the Hedgehog & Undertale - Rated: K+ - English - Adventure/Friendship - Chapters: 4 - Words: 3,605 - Favs: 4 - Follows: 3 - Updated: 9/1 - Published: 6/17 - Sonic, Frisk, Chara
Yandere Simulator x Undertale by jonesbrownleona6
This is a Yandere simulator x Undertale AU-ish.
Crossover - Yandere Simulator & Undertale - Rated: T - English - Adventure/Romance - Chapters: 1 - Words: 159 - Published: 8/31
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: 3 - Words: 10,608 - Reviews: 30 - Favs: 78 - Follows: 93 - Updated: 8/31 - Published: 5/7 - Sans, Alastor, Charlie, Blitzo
TALE, told True by Razaraga
A Nation, left with it's King dead. A Village, with a pariah about to be tried. A Child, desperate for love. And a Queen, longing for children. I wonder... what do these have in common?
Crossover - X-overs & Undertale - Rated: M - English - Chapters: 2 - Words: 1,816 - Follows: 1 - Updated: 8/30 - Published: 7/3 - OC, Toriel
The Evil of Principal Willaby by callofdutyFTWnintendoFTL
The horror of Principal Willaby is truly horrifying.
Crossover - Jimmy Neutron & Undertale - Rated: M - English - Horror/Angst - Chapters: 1 - Words: 1,058 - Published: 8/28 - Principal Willoughby, Asriel, Toriel, Asgore D. - Complete
Sinstale by Pikachu the critic
Taking under a nickname, you explore the underground where the demons were sealed. Will you make peace with them or make them face true wrath? The choice is yours.
Crossover - Seven Deadly Sins/七つの大罪 & Undertale - Rated: T - English - Adventure/Supernatural - Chapters: 2 - Words: 2,349 - Updated: 8/28 - Published: 8/24
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: 59 - Words: 87,986 - Reviews: 41 - Favs: 160 - Follows: 165 - Updated: 8/28 - Published: 11/28/2020 - Luffy, Frisk
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: 8 - Words: 12,151 - Reviews: 7 - Favs: 19 - Follows: 23 - Updated: 8/27 - Published: 5/19 - Vanny/Reluctant Follower, Gregory, Frisk, Sans
Don't Forget by Scourge7
"You mean to tell me that thanks to some girl with a blue and purple sweater that the entire world is messed up?" "Yep." "And nobody in Gravity Falls remembers Gruncle Stan or Ford?" "Yep." "And the only way to fix it is for me and Mabel to go to some mountain and fall into a hole?" "Yep." "I knew I should've stayed home."
Crossover - Gravity Falls & Undertale - Rated: T - English - Adventure/Mystery - Chapters: 1 - Words: 4,646 - Favs: 4 - Follows: 7 - Published: 8/21
SOULS of Barian! by bopdog111 reviews
Sequel of "The Hope Reborn". Years after Illaster's defeat the Princeton Family seem to do unfinished business with the Anomaly, and Agate who escaped, and are facing a new threat from the Barians, and the Number cards with allies from Astral World, and Yuma Tsukumo. Co-Written with Ulrich362. SharkxOC, RioxOC, YumaxCathy
Crossover - Yu-Gi-Oh! ZEXAL & Undertale - Rated: T - English - Romance/Adventure - Chapters: 23 - Words: 160,023 - Reviews: 4 - Favs: 21 - Follows: 16 - Updated: 8/17 - Published: 9/11/2020 - Ryoga K./Shark, Rio K., OC, Frisk
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