1 - 20 of 142 Works in Alternate Universe - Fellswap (Undertale)

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  1. Tags
    Summary

    You had long forgotten what you used to be like before the war. Who you were before Sans.

    You had resigned yourself to dying like the rest of the rotting corpses on the battlefield, the glorified title of the "Judge" nothing more than another meaningless name to be forgotten like the rest. Everyone you cared about was dead and gone, and Papyrus no longer looked you in the eye anymore. You were ready for it all to end in a blaze of glory.

    You hadn't anticipated you and your brother to be caught in the crossfires of a malfunctioning machine, bringing you both to an alternate, peaceful universe with other versions of yourselves.

    We need more sans!reader fics, so I decided to take things into my own hands and make one.

    Language:
    English
    Words:
    10,278
    Chapters:
    3/?
    Comments:
    40
    Kudos:
    173
    Bookmarks:
    39
    Hits:
    1032
  2. Tags
    Summary

    Sans was sick, and it was Alphys' fault. Luckily his big brother would take care of him until he got better!

    Series
    Language:
    English
    Words:
    507
    Chapters:
    1/?
    Kudos:
    2
    Hits:
    19
  3. Tags
    Summary

    Sometimes life throws you a curveball. For you, your curveball was going to bed looking like a human, and waking up looking like a monster.

    A skeleton monster to be precise.

    With the barrier breaking, a large surge of magic descended on the town you live in, and transformed you overnight. Unsure what to do with you, and the others changed, you're ushered into a facility until a monster with similar magic can take you to teach you how to wield the now uncontrollable magic you've been given. After waiting in this place for four years, you'd given up hope that anyone would ever want to take you.

    What a surprise for you when you find out that someone does. A lot of someones.

    Language:
    English
    Words:
    235,474
    Chapters:
    33/?
    Comments:
    1873
    Kudos:
    2030
    Bookmarks:
    432
    Hits:
    61421
  4. Tags
    Summary

    If the tags and title haven't given it away, this is a one-shot request book! In other words, I want to write porn and have no ideas of my own. Drop a comment with an idea, I'll consider it, and I'll probably write it if I like the sound of it. First chapter will list what I WILL and WONT write, so make sure to check in on that first.

    Language:
    English
    Words:
    225
    Chapters:
    1/?
    Comments:
    12
    Kudos:
    15
    Bookmarks:
    3
    Hits:
    441
  5. Tags
    Summary

    We all know the story by now. Multiverse shenanigans ensue after a gaggle of skeletons end up in a Classic Undertale universe because of that damned machine. This happens a lot more often than one would think, yet it still catches you by surprise when you find yourself (and your Sans and Papyrus) pulled through into another universe.

    Well, you're not *that* surprised. It isn't the first time you've met an alternate version or two of your boys. It *is* the first time that you find yourselves as the alternates (plus one). Either way...

    We've all read enough fanfiction to know how this story goes.

    Language:
    English
    Words:
    3,859
    Chapters:
    8/?
    Comments:
    10
    Kudos:
    104
    Bookmarks:
    22
    Hits:
    969
  6. Tags
    Summary

    Aloha! As the title states I'm open to writing one-shots if you comment a prompt/idea :) Undertale, Deltarune and different AUs, shipping, lemons, fluffs, drama--etc I'm flexible.

    Series
    Language:
    English
    Words:
    50
    Chapters:
    1/1
    Comments:
    7
    Kudos:
    1
    Hits:
    22
  7. Tags
    Summary

    Meet Sam, Hazel, and Hana. Two werewolves and a witch just trying to get through college. With summer comes a new roommate... and her harem of skeletons. Can these sisters of the heart get through the upcoming semester without committing murder? Or will the brat push them too far?
    My money's on the latter.

    Language:
    English
    Words:
    2,338
    Chapters:
    3/?
    Comments:
    2
    Kudos:
    41
    Bookmarks:
    11
    Hits:
    347
  8. Tags
    Summary

    Reader gets strange dreams of a deep female voice and feline eyes the color of the moon.
    These dreams lead to a new form and a missing mother.
    How will reader cope with being treated as a animal and the loss of her family.
    As time goes by she loses her past memories and her emotions.
    Can the living skeletons she meets in a forest help her.
    We'll just have to wait and see.

    Language:
    English
    Words:
    17,651
    Chapters:
    13/?
    Comments:
    28
    Kudos:
    190
    Bookmarks:
    34
    Hits:
    3082
  9. Tags
    Summary

    You know how it felt when you would bump into one of your teachers at the grocery store as a kid? Like they were gonna give an entire report of your behaviour to your parents, right smack in the middle of the supermarket? Yeah. That's probably how she feels. Or, at least, you hope that that's how she feels. Otherwise you're not going to be able to coexist.

    "Hey, it's been a minute!" Her smile meets her eyes, warm and sweet.

    ...Yeah, this ain't gonna work. This was a horrible idea.

    In which you decide you probably don't need to meet every single person you'll be living with before signing your lease, and end up living with somebody you never planned on seeing ever again - plus her 10 skeletal boyfriends, who are none the wiser. This should be good.

    Language:
    English
    Words:
    231
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    17
    Bookmarks:
    4
    Hits:
    251
  10. Tags
    Summary

    Cabin fever leads to an unexpected swim with the fishes.

    Series
    Language:
    English
    Words:
    2,135
    Chapters:
    1/1
    Comments:
    2
    Kudos:
    2
    Hits:
    17
  11. Tags
    Summary

    Bun meets the Crew of the Jolly Skull

    Series
    Language:
    English
    Words:
    1,284
    Chapters:
    1/1
    Kudos:
    1
    Hits:
    9
  12. Tags
    Summary

    What happens when You get transported into a universe that isn't your own? One where you end up in a house full of skeletons you know too much about?

     

    It was a normal morning, that is until your clumsy ass tripped and fell into the shadows of the void. And with a BANG! ended up in a big house full of skeletons. Which you absolutely freak out about (in a good way).

     

    But here's the catch, they don't live alone. And the she-demon is definitely threatened by your presence.

     

    In other words, another Anti Harem fic. But honey, we aren't like THAT old generic hoe. We're a sweet little unforgettable thing.

    Language:
    English
    Words:
    4,028
    Chapters:
    5/?
    Comments:
    13
    Kudos:
    122
    Bookmarks:
    31
    Hits:
    1161
  13. Tags
    Summary

    Fluff puppymoney based on a rp with me and someone else. yuh, there's nothing else to add onto that I guess.

    Language:
    English
    Words:
    572
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    7
    Bookmarks:
    1
    Hits:
    25
  14. Tags
    Summary

    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 discover that you had been dragged out of your universe and into one that looks the same, except everything is Swapped Over.
    *Updated Description

    Language:
    English
    Words:
    36,751
    Chapters:
    14/?
    Comments:
    92
    Kudos:
    486
    Bookmarks:
    97
    Hits:
    6873
  15. Tags
    Summary

    Razz has had a very rough go on the surface. Between his racist coworkers, psychological issues and his brother’s waning loyalty, he’s been finding the days harder and harder to get through.

    Will he be able to repair the damage caused to his and his brothers relationship? Or will he fall under the pressure of living a civilian life?

    It may take help from an unlikely, extremely fuzzy source, to get there. (Warning: lots of cat fluff is ahead)

    Series
    Language:
    English
    Words:
    84,049
    Chapters:
    17/?
    Comments:
    347
    Kudos:
    173
    Bookmarks:
    37
    Hits:
    3286
  16. Tags
    Summary

    Edge is a simple animal hunter and owns a shop in a frantic town. He would love nothing more then to move away then worry about the danger being held over his head. As him and his brother are planning to move, He meets a strange new customer. They're very friendly and shy, saying a few words at most. Edge finds himself dragging his feet to move as he has mixed feelings for this stranger. What a shock it is to find out they're the monster that this town fears the most.

    Language:
    English
    Words:
    3,685
    Chapters:
    1/?
    Comments:
    3
    Kudos:
    8
    Bookmarks:
    2
    Hits:
    71
  17. Tags
    Summary

    i have no clue what i'm doing but here we go
    the cast of no evil was trapped underground time passed and the remaining spirits of the group found a skeleton child that is the new host for the black tezlapolca. Unfortunately the now empriss undyne make being a spirit illegal so with little options Amaroq took the skeleton child now named Tez and Escaped. lets follow their journey in the new universe they found themselve in

    Language:
    English
    Words:
    739
    Chapters:
    1/?
    Kudos:
    3
    Hits:
    76
  18. Tags
    Summary

    Stand up comedy by the comics and their content is you

     

    Swapfell:
    In which Papyrus is gossiping about his brother and his brother’s datemate. Which makes you and Sans more popular than Papyrus and the two of you don’t have any idea he was doing stand up comedy that was being aired worldwide.

    Underfell:
    In which Sans loves to show you off and loves to talk about you to strangers. Now you’re wondering who the fuck are these strangers and why are they trying to follow your footsteps as if you’re an influencer.

    Underswap:
    In which Papyrus lowkey brags bff goals between the two of you. Also highkey brags about the relationship goals between you and Sans.

    Undertale
    In which Sans can rely on you with coming up the most stupidest and also the most brilliant ideas. But talking about you eventually makes his own audience gravitate towards your beautiful brain that creates these ideas.

    Fellswap
    In which Papyrus does mischievous things to everyone may it be man or monster. So the both of you team up to torment his brother which is your datemate

    Series
    Language:
    English
    Words:
    12,935
    Chapters:
    40/?
    Comments:
    168
    Kudos:
    453
    Bookmarks:
    63
    Hits:
    8781
  19. Tags
    Summary

    It's not unknown for a place to drive sexual proclivities into its inhabitants. Existing in a world like this gives monsters the thrill of the fight, the lust of triumph.
    Papyrus is afflicted with something else entirely.

    Language:
    English
    Words:
    2,424
    Chapters:
    1/1
    Comments:
    2
    Kudos:
    13
    Bookmarks:
    1
    Hits:
    142
  20. Tags
    Summary

    A majorly injured Blue is rescued by Grape, who may or may not have a requited crush on him.

    Kinktober 2021 Day 30: Prostitution

    Series
    Language:
    English
    Words:
    631
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    15
    Bookmarks:
    1
    Hits:
    151

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