Underswappapyrus Stories

Humanity is divided over one thing---the Monsters' reappearance. Some believe that they should stay aboveground, and others think that they should be sent back to where...

What if someone became papyrus from underswap? What if they gave their brother more freedom? What if they were the one that error kidnapped instead of sans? (Things wil...

Before the events of Underverse begin, seven people disappear from their Multiverse. Dream, Error, Fresh, Stretch, Outer, Core!Frisk and Cross!Chara are trapped in a new...

Bad Time Trio meets BNHA Disclaimer: I do not own BNHA, Or Undertale, or any of the AU or any of the pictures showed

Since there is no or any "bonely hearts club x female reader" I will be the first one to do it... so I hope you enjoy this book.

Y/N, meets a new coworker that changes her life forever. A monster, doing his best to make a living after moving out of the underground. Sans is this ecstatic, cheerful...

It's been a few years since Y/N started her family. Without Honey, she made due with what she had; that being the cafe, her brother-in-law Blue, and her two twin sons. O...

The three of them met people they had never seen before, and at the same time, they were all killed by him. When they have clear consciousness, they are all in the same...

your name is Y/N. you are a lamia bitty. you lived in an inclosure in a pet store. one day a monster skeleton walks in and sees you hanging in your inclosure on a fake t...

This is just a reboot of a previous version of Dustprint I deleted due to how stuck it made me. Unlike before, where he kills his own father to stop the human, he is bor...

This Is A Fan Fic For My Favorite Undertale AU Ship Honey Mustard! (US!Papy x UF!Sans) -Disclaimer- UnderSwap Papyrus and UnderFell Sans do not belong to me. UnderSwap P...

What happens when a shortcut goes wrong and Frisk ends up in another universe? Will she be safe and more importantly will she get back home? Read and find out! (This st...

Edit: I'm sorry but this book is discontinued. I lost interest in this book and I couldn't do anymore chapters. I'm sorry but I'll maybe put some chapters in at time to...

The title says it all. Sorry this is my first book so it's probably a piece of crap. Will contain mature content. Such as, swearing, abuse, general violence.

Ask the adorable blueberry muffin right here! Don't worry he won't bite! But Papyrus might, so prepare for that XD MWEH HEH HEH!! :D

The bone zone.

Undertale AU that contains the question, what if all of the known determination users were to be put in one and same universe. Firsk, Chara, Kris. Curious?, Check it out...

(This story is not a part of the Alphatale Story) Blueprint, the son of Ink and Underswap Sans, had been put into a situation that has came to beyond his control. One mo...

Trapped. That was the best way to describe how Fell felt. Trapped. A brother who abused him. And friends who didn't care. Even people he thought he could trust turned ou...