undertale
28 stories
Wrong Code (Bnha X Undertale) by Shadowgeng
Shadowgeng
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    Parts 12
After finishing the pacifist route, something interrupt Frisk, making all of the Undertale character being thrown to an anime that call as Boku no Hero Academia. Frisk realized that power is normal in this world. She want to bring her friends home but how? Let see Frisk new adventure in this world! "Chara?! What are you doing?!" "Shut up, Frisk! Sans remember the genocide route and he wants to kill us."
Steven Universe Meets Undertale by FlameVellDragon
FlameVellDragon
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    Parts 4
Basically what this story is about is what I think would happen if Undertale met Steven Universe. I plan on making this like a love story.
Steven Universe/Undertale Crossover  by WyattFrain
WyattFrain
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    Parts 8
A Story where Steven Universe and Peridot Meet the Monsters from the Underground and This is some what a Stevidot Story but with a hint of Undertale So will they Survive down in the Underground found out
Undergems (A Steven Universe and Undertale Crossover) by coffeem0chi
coffeem0chi
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    Parts 29
What will happen when the gems fall into the underground?
Under Universe by Zimbee33
Zimbee33
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Papyrus and Sans appear in Beach City, due to universe breaking logic, and they meet Steven Universe of all people. After Steven decides to introduce the skeleton brothers to his family of holograms with mass, misadventures occur as Papyrus and Sans create antics for the Crystal Gems and Steven. Most of these involving horrible puns and spaghetti.
The Story of a Reaper [COMPLETE ✔] by tRaSh_4U
tRaSh_4U
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When made by his father, the god of death, he didn't know his purpose. All he could do was kill things on accident...he didn't mean to kill them, he just wanted a friend. When the people and monsters of the town banished him in the forest, he started to live there, experiencing different things and different forms of life...only to kill them. He soon figures out his purpose...it's to kill, to Reap...to destroy...just like his father wanted him too...Reaper didn't want to kill, and that made his father angry... He was forced to kill others by his father, to kill animals, people, monsters, even plants and bugs... He didn't like it at all, it broke his heart when he killed them...making people, monsters, and animal fear him...it was saddening...not to mention that Toriel the daughter of life hates him with all her might... When ordered to go kill off other people and monsters from different AUs, Reaper would beg for his father to rethink what he is ordering, which makes his father mad and punish him... Finally obeying his father he reaped other souls from other AUs. It wasn't too long before the creator of AUs met him and hated him for what he did to his creations, and it wasn't too long before Nightmare found him. Wanting a friend of any kind, he joined Nightmare and his gang, just because he want to interact with people that wouldn't run away. Causing chaos with Nightmare and his team. Finally he was somewhat content, with being evil, and having friends who'd always have his back, he was fine with killing, torchering, that's what he was made for... In till he found a soul that couldn't be reaped... Has touched #1 in reapertale Has touched #1 in blueberrysans Has touched #1 in killersans Has touched #1 in nightmaresans
What Is Love?  by Rosu-chan
Rosu-chan
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    Parts 16
For many years, Frisk never once knew about Valentine's Day. What?!! That's probably what you're thinking. Anyways, Frisk has a huge crush on a certain skeleton who's also crushing on someone else. Will she be able to confess her love to him and live a happy ending? Also...Frisk is a girl in this story ;) UNDERTALE DOESN'T BELONG TO ME. IT BELONGS TO TOBY FOX. None of the used pictures&gif's are mine. And that's about it. Plz follow, vote, and comment in my books. I'll be happy to hear from you. Buh bye!!!!
Dancetale - The Dance of Monsters (Sans x Frisk) by MysticWinds
MysticWinds
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Frisk is just some regular ol' girl who loves to dance more specifically ballet but will she change her style a bit when she meets a certain skeleton? Will unexpected love bloom? Hey guys winds here! I'm excited to bring to you my dancetale tale story, I do not own the cover nor any of the characters. And if you don't like my ship then don't read or post hate because of that I hope you guys enjoy! -winds out
Rejection by Monster_Lover_
Monster_Lover_
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Heya! Monster Lover is back with another Fransfic, yay!! This first book is SFW. It contains depression and some hot kisses, but that's it. I left the real smut for the sequel. Enjoy!
Matching Tattoo by CerlinaRyuu
CerlinaRyuu
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We all have it... the tattoo that will bring us to our mate... but.... is that easy? they can be really far away... but what if he/her actually really close without we knowing it?