Fellswap Stories

What if someone from our world died knowing a lot from the undertale and their multiverse/underverse? What if that person also knew about the balance and didn't creat to...

What if Izuku midoriya and his friends killed them selves because of bakugou the little shit who bullies them with his gang until they reincarnated as their favorite bad...

Who thought that one day someone would break into your house and slice your neck in your sleep? Well, that was what happened, right before you were integrated into a shi...

You are a introvert who loves undertale and multiverse and loves to play video games and listin to music. What will happen if one day you meet the skele-bros of differ...

Hi guys! First of all I should mention that the story pic isn't mine and of course Fellswap belongs to its original creator. A young hiker, Y/N gets lost and accidental...

Having little to no memories on what happens, you wake up to find two skeleton brothers who look awfully similar to yours. Confused and slightly disoriented, you later d...

Who would have thought that being bored in quarantine would result in being sucked in into the worse dating sim ever? Well, (Y/n) never believed that would happen, until...

What if two brothers somehow end up in their own story as the sans and papyrus that they made? They called the story starfell, mostly because everyone in the story is li...

Geno is a lonely thief, resident of a small sea village. His past is covered in darkness. Somehow he can't recall who he was or his parents. He only had his 2 younger br...

What if someone from our world became the multiverse? Well everything is not likely to stay the same at all.. (Things will be different even possible personalities or a...

The swap brothers stubble upon not one but two other skeletons. Both in serious condition Who are they and where do they come from ? Underfell,Underswap and Swapfell doe...

(Got ranked #607 in fanfiction) This is about the cherryberry ship. Red is just standing around one day whenever Blue randomly pops out nowhere in to his life and won't...

Undertale Sans... Underswap Papyrus... Storyshift Chara... What could go wrong?

One-shots with your favorite Skeleton, human, goat, weed, robot, lizard, fish, whatever!! This is my first One-shot book on Wattpad....so uh,...yeah :P I am Taking reque...

Undertale fontcest fic, NSFW warning here and here only. A sexy, kink-filled fanfic that probably doesn't make sense canonly. Pairing: Stretch (Underswap Papyrus) & Slim...

hey everyone who is gonna read this oneshot book please request if you want requests are open right now . i will do lemons , fluff ,angst and etc. so just request what a...

She's been here too long, drifting through a space devoid of time and reason. Speaking to ghosts long gone and echoes of her own voice, a lesser being would have gone ma...

FELLSWAP SANS X UNDERFELL SANS .................. okay seriously, help. .... quick summary here: Fell is abandoned and is found *coughs* captured *coughs* by Razz ...

Under the training of Dr. Strange, (Y/N) is learning to control her powers. But when she i left alone for the first time. Skeletons suddenly start appearing out of nowhe...

Y/N, a 20-year-old ((Insert gender)) in the city below MT. Ebott, who gets fired the day they were going on MT. Ebott and they didn't know going up this mountain would c...