Fellswap Stories

What if..someone from our world was reborn as fellswap sans? But an accident when he was young leads to becoming blind for a long time and papyrus feels guilty about not...

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...

(As far as I know, no one has made a story about naturetale like this so..and the only reason why I writing one like this is because of fatal error part 5? Or part 4, go...

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...

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...

I was reborn as sans from my own made up au. How did that happen? I have no idea. Luckily I was still a kid so I didn't have to act like how I made sans to act like but...

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...

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...

You were always put in second place due to your sister being favored over you. No matter what you did it always seemed that you both were competing against each other. Y...

Undertale one-shots, imagines and scenarios reader x various Requests open! I have a habit of slipping into Fem reader, but i'm happy to make a gender neutral or male re...

this is a story about a girl who finds little bitties who were abandoned and takes them in little does she know that its harder than she thought and that the bittys won'...

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...

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...

Echo had a plan. A really good one. Free Monster kind from the spell casted by humans. Find her sibling who disappeared. Then undo the curse placed on her. But when she...

Frisk heard stories about vicious monsters that lived underneath the Mount Ebbot. She had heard stories about humans going up the mountain and never returning. Honestly...

(Y/n) finds herself in a bit of pickle when Ink Sans explains to her about the condition of the Sanses of the multiverse. No matter what, she is determined to help Ink...

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...

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

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...

(this is Sans Aus and Papyrus Aus x Male!reader fanfic , pls don't say anything weird about it as this is for my own entertainment -) (Also I take the tags from my AO3 s...