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sans escapes from a constant genocide to remnant by As of cookies
after escaping from the genocide thanks to the reactor explosion, sans ends up in the world of remnant without understanding anything of what happens and is seriously tired (possible cross elements, changes in rwby and sans, and the fanfic will only address sans in remnant) cross posted
Crossover - RWBY & Undertale - Rated: T - English - Adventure/Fantasy - Chapters: 1 - Words: 10,513 - Published: 11h - Sans
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: 24 - Words: 169,581 - Reviews: 4 - Favs: 21 - Follows: 16 - Updated: 10/19 - Published: 9/11/2020 - Ryoga K./Shark, Rio K., OC, 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: 3 - Words: 13,275 - Reviews: 6 - Favs: 8 - Follows: 12 - Updated: 10/17 - Published: 9/4 - Lincoln L., OC
The icewing egg with most colors by Universecrossover reviews
Another war with the bad guys. Ink fought error, as usual. Little did ink know the adventure that awaited him… Rated T just to be safe
Crossover - Wings of Fire, Tui T. Sutherland & Undertale - Rated: T - English - Adventure - Chapters: 9 - Words: 1,709 - Reviews: 10 - Favs: 1 - Follows: 1 - Updated: 10/17 - Published: 10/13
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: 12 - Words: 54,791 - Reviews: 16 - Favs: 34 - Follows: 50 - Updated: 10/16 - Published: 7/31 - Vergil, Mettaton Ex, Credo, Napstablook
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: 32 - Words: 119,624 - Reviews: 1 - Updated: 10/15 - Published: 2/7/2020
The Destination Follows the Journey by Shippo704
They just wanted to be themselves. Their parents didn't listen. They didn't understand. When their parents wanted to send them to a conversion camp, they decided it was time to run away. After an incident in the nearest national park, they find themselves in world of monsters and magic. Then, along their journey, they make friends and find themselves too.
Crossover - Undertale & Wayward Children series - Rated: T - English - Adventure/Hurt/Comfort - Chapters: 3 - Words: 8,320 - Updated: 10/13 - Published: 10/5 - Frisk, Sans, Toriel, Mettaton
Maelstromtale by hussbek reviews
Stories speak of a mountain where children have gone and never returned, unknown of the mystery which lies within it. Now history repeats itself as a child falls but with a twist as another joins...and to think a mild stroll got him into something thought of as fairy tales.
Crossover - Naruto & Undertale - Rated: T - English - Adventure/Supernatural - Chapters: 17 - Words: 109,539 - Reviews: 144 - Favs: 324 - Follows: 377 - Updated: 10/13 - Published: 5/25/2020 - Naruto U., Frisk
Ruby Red Eyes by DazMaZ reviews
The war of Heroes and Villians rages on, but what happens when DETERMINATION appears in their world?
Crossover - My Hero Academia/僕のヒーローアカデミア & Undertale - Rated: T - English - Adventure/Friendship - Chapters: 8 - Words: 50,953 - Reviews: 129 - Favs: 381 - Follows: 487 - Updated: 10/10 - Published: 8/28/2020 - Katsuki B., Frisk, Chara
A light in the void by Autumn Galactica reviews
Summer and Autumn were very close because both of them are twins... Years passed by, Summer was sent on a mission and didn't came back, Autumn Rose who came from a far location had gone back to Vale to meet her family and lastly her twin, a shocking news that will break Autumn's heart will change her forever however she won't stop until she sees her whether dead or alive
Crossover - RWBY & Undertale - Rated: K - English - Hurt/Comfort/Adventure - Chapters: 4 - Words: 1,365 - Reviews: 2 - Favs: 3 - Follows: 3 - Published: 10/10 - Team RWBY, Team STRQ, OC, Sans
UnderDxDTale by Jack No in Heaven reviews
(Crossover con Undertale) (Male Frisk). Después de Lograr salvar a todos Y crecer juntos, Frisk disfruta de una vida tranquila hasta el momento que lo manda lejos de todo lo que conoce. Ahora lejos en un lugar que apenas conoce, esta seguro de algo... Esta lleno de Determinación. Una que hara cambiar el mundo.
Crossover - High School DxD/ハイスクールD×D & Undertale - Rated: M - Spanish - Adventure/Romance - Chapters: 5 - Words: 26,118 - Reviews: 40 - Favs: 47 - Follows: 50 - Updated: 10/10 - Published: 3/13/2017 - Frisk
Frisk Potter (rewritten ver of frisk's sercets) by Blacmage reviews
summary inside fem!harry
Crossover - Harry Potter & Undertale - Rated: K - English - Family/Hurt/Comfort - Chapters: 3 - Words: 4,146 - Reviews: 6 - Favs: 37 - Follows: 49 - Updated: 10/10 - Published: 5/18
Wind and Fire by Redwood Sorrow reviews
The Avatar has the greatest power of all. Determination. The ability to persist through even the most trying of circumstances. But with the weight of the world on his shoulders, and an equally determined princess after him, will it be enough to restore balance?
Crossover - Avatar: Last Airbender & Undertale - Rated: T - English - Adventure/Drama - Chapters: 33 - Words: 191,290 - Reviews: 41 - Favs: 38 - Follows: 42 - Updated: 10/9 - Published: 4/7/2018 - [Aang, Azula] Katara, Frisk
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: 7 - Words: 26,768 - Reviews: 70 - Favs: 215 - Follows: 236 - Updated: 10/9 - Published: 3/18 - Jaune A., Undyne, Toriel, Asgore D.
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: 1 - Words: 5,115 - Reviews: 2 - Favs: 8 - Follows: 13 - Published: 10/8 - Ruby R., Yang X.L., Chara, Flowey
Socrates in the caves by HushBugger reviews
What if Socrates fell into the underground?
Crossover - Misc. Books & Undertale - Rated: K - English - Chapters: 5 - Words: 2,855 - Reviews: 7 - Favs: 9 - Follows: 9 - Updated: 10/8 - Published: 8/14/2017 - Papyrus, Undyne, Toriel, Mettaton
Batmantale by AlithiaSigma reviews
Batman finds himself in the Underground with nothing but his clothes and the drive to continue on. Really, it's Batman in Undertale. And Batman does have one power. He never gives up.
Crossover - Batman & Undertale - Rated: T - English - Chapters: 9 - Words: 16,801 - Reviews: 116 - Favs: 130 - Follows: 193 - Updated: 10/6 - Published: 2/21/2016 - Bruce W./Batman, Sans
LoudTale by Scourge7
What happens when three kids fall into Mt. Ebott? What will they do? How will they survive? And most importantly, how will their choices affect everything? Find out in this tale...LoudTale
Crossover - Undertale & Loud House - Rated: T - English - Adventure/Humor - Chapters: 1 - Words: 4,212 - Favs: 2 - Follows: 3 - Published: 10/6
Book 1: The Souls of Ebbot by The Night Ninja reviews
Zane dies to the overlord but his afterlife is not exactly the Departed Realm. He winds up in the Underground and quickly makes friends with most of our main characters. Of course, everyone's favorite TV personality finds himself falling hard for the new bot in town. Drama and Romance ensues, but no bloodshed. When Frisk Falls the Underground won't look the same. Crossposted on AO3
Crossover - Ninjago & Undertale - Rated: T - English - Romance/Humor - Chapters: 21 - Words: 33,644 - Reviews: 16 - Favs: 10 - Follows: 9 - Updated: 10/5 - Published: 6/13/2021 - [Zane, Mettaton Ex] Alphys, Asgore D. - Complete
Ancient Magickes by Flying Dragonite reviews
"Legend has it, an 'angel' who has seen the surface will descend from above and bring us freedom." Upon Harry Potter's 16th birthday, he finds himself receiving a creature inheritance of such monumental importance, that he may be the key to peace between monsters and humans, purebloods and muggleborns, wizards and muggles. And he had always said he simply wanted to be "just Harry".
Crossover - Harry Potter & Undertale - Rated: T - English - Hurt/Comfort/Angst - Chapters: 25 - Words: 42,207 - Reviews: 158 - Favs: 711 - Follows: 803 - Updated: 10/3 - Published: 12/28/2016 - Harry P., Papyrus, Sans, Chara
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: 26 - Words: 61,762 - Reviews: 1 - Favs: 5 - Follows: 4 - Updated: 10/1 - Published: 4/2 - [Andou, OC] Eclair, Rosehip
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: 10 - Words: 16,545 - Reviews: 2 - Favs: 9 - Follows: 15 - Updated: 9/30 - Published: 8/6 - Percy J., Sans, Toriel
Under the Veil by poplasia reviews
Sans has gotten himself stuck in the void between worlds in a successful attempt to stop the resets of his timeline. He's not sure how long he's been chillin' alone there, but eventually a chance at escape stumbles his way in from the Veil of Death. His name?—Sirius Black. (no pairings)
Crossover - Harry Potter & Undertale - Rated: T - English - Fantasy/Humor - Chapters: 66 - Words: 229,162 - Reviews: 2158 - Favs: 2,269 - Follows: 2,571 - Updated: 9/30 - Published: 8/1/2016 - Sirius B., Sans
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: 32 - Words: 58,866 - Favs: 1 - Follows: 1 - Updated: 9/30 - Published: 3/30/2021 - [Alphys, Sans, Undyne] Frisk
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: 2 - Words: 3,797 - Reviews: 4 - Favs: 11 - Follows: 10 - Updated: 9/27 - Published: 9/16
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