Fellswap Stories

An Undertale Multiverse I'm working on. AUs are various nations around a fantasy world with various continents and islands.

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...

You died and got reincarnated into Fellswap Gold. You are now Papyrus. What the fuck! Not my art! https://www.tumblr.com/meatballsu Original creator of Fellswap Gold: ht...

an outbreak has accured, but.. it has affected the skeletons differently.

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...

(I have to rewrite the first bits I had because wattpad glitched!) Kingdom AU, merge AU, mystic creatures, people meet and fall in love

includes - All Aus (so far) - Journals (from characters) - Character lore (By creator [There may be multiple of an AU character]) - Pictures for lore - Videos for lore (...

Here is a collection of oneshots I write in between my other stories to practice some character's personalities. I will not be taking requests and there won't be any spe...

Cypher and Code come from a timeline that was once a technological haven, but fell to ruin due to the war. Now pulled into the classic timeline, they must adjust to thei...

(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...

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...

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...

This is about the Alternate Universes of Undertale, about a new monster. A Human-Monster Hybrid, she was an experiment of W.D Gaster. Gaster wanted to see if it was poss...

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...

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...

Just a book about blue getting the attention of pretty much all au's now they want him might update this description sooner or later maybe never but it's whatever. Anywa...

(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...

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...

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...

was originally from quotev, just thought it'd be fun to hv it here aswell this just works for my own benefit for where ideas go but not die (yet). Most of these woul...