Undertale (Multiverse) Fanfics
11 stories
Castle's Pet (Bad Guys X Reader) by EmelinStriker
Castle's Pet (Bad Guys X Reader)
EmelinStriker
  • Reads 455,904
  • Votes 13,455
  • Parts 41
[Highest Rank: #1 in "sans"] [Second Highest Rank: #18 in "xreader"] (Girls only!) (Earlier updates are on my Quotev account!) WARNING: Profanity and Violence! You were a normal 17 years old girl from the Undertale universe, you fell down Mt. Ebott when you were 15 and you've lived in the Ruins with Toriel. Oddly enough, you haven't heard anything from (F/N) since you fell. And you knew he planned something. The Villains needed a new plan against the Star Sanses and some other heroes. What happens if a mysterious cloaked man tells them about about you?
Bone of Contention (Underswap Papyrus X Reader) by TheIndianaCrew
Bone of Contention (Underswap Papyrus X Reader)
TheIndianaCrew
  • Reads 373,258
  • Votes 14,730
  • Parts 62
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 they came from. Then, there are those like you who don't quite know what to think yet. What will happen once you become acquainted with two skeleton brothers? Will you finally decide your standing on this issue? And is it possible that you will find love along the way? Thanks to crispicroissant on DeviantArt for letting me use their artwork as the cover of my story!
(Underfell sans x reader (female)) UNDERCOVER by moon1767
(Underfell sans x reader (female)) UNDERCOVER
moon1767
  • Reads 501,735
  • Votes 17,543
  • Parts 64
You're a human that has fallen into Mt. Ebott on the year where all humans dress as monsters...Halloween. So how will the monsters know if you're a human or not?
Underswap Papyrus x reader by Dragon_Star14
Underswap Papyrus x reader
Dragon_Star14
  • Reads 170,031
  • Votes 4,583
  • Parts 34
{Insert random description}Well,I've got nothing :P
Lazy Love - UnderSwap Papyrus x Reader-Chan  by ThatOneWeirdo101
Lazy Love - UnderSwap Papyrus x Reader-Chan
ThatOneWeirdo101
  • Reads 66,289
  • Votes 1,314
  • Parts 18
The puns and jokes in this are possibly terrible, this is a WARNING
A Little Bonely (Sans X Reader) by UltimateUndertrash
A Little Bonely (Sans X Reader)
UltimateUndertrash
  • Reads 345,242
  • Votes 8,595
  • Parts 51
Monsters always fasinated you. Ever since Frisk broke the barrier and freed the monsters, humanity didnt take it too well but they are slowly getting used to it. Slowly. Very...slowly. (btw Chara is depicted as a female in this story, and so is frisk. Dun be triggy) HEY ALL! This is my first fanfiction EVER! so dont judge. [NC 16] at some parts :>
(Sans x Reader) When Two Souls Meet by ZanaBSparrows
(Sans x Reader) When Two Souls Meet
ZanaBSparrows
  • Reads 957,839
  • Votes 27,544
  • Parts 28
Sans has lived through countless timelines. He's seen the kid make friends with everyone, only to give up in the final moments. He's seen the kid killed, over and over and over again. Sometimes, he'd even done the killing himself. And no one ever remembers. Not even the kid herself. It's an exhausting cycle, one that never seems to end. But there's something different about this run. Another human's fallen down... the kid's sister. Please note the the story is primarily on Quotev, so updates to Wattpad may be late, or lag behind that of Quotev. The story also has the potential to become mature. (I haven't decided yet.)
{COMPLETED} Sans x Reader Oneshots by yumaio
{COMPLETED} Sans x Reader Oneshots
yumaio
  • Reads 348,396
  • Votes 6,332
  • Parts 36
Well, I got requested to do this and I dedicate the first part to them! Basically this is just random scenarios with you and Sans! DISCLAIMER: I do not own Undertale or you. COMPLETED Cover made by @HoundsTooth
Silently Sleeping (Underswap!Papyrus x Reader) by GamerQueen2002
Silently Sleeping (Underswap!Papyrus x Reader)
GamerQueen2002
  • Reads 248,095
  • Votes 10,962
  • Parts 37
Underswap!Papyrus x Reader And some Fresh!Sans x Reader -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- It isn't hard to slip into a dream. You're happy with what your mind makes up and you stick with it until you wake up. Nightmares are hard to sink into. Death, tears, bloodlust, screams of terror and agony. You eventually wake up crying and wondering why your head would come up with something so sadistic. You're not in a dream. You never were. It's always been a nightmare. Always. -_-_-_-_-_-_-_-_-_-_-_-_-_- "My heart fills so... empty." "Please don't do this, (Y/n)!" "I'm sorry I caused so much pain... but we both don't have to suffer anymore."
All Bark No Bite (UnderfellPapyrus X Reader) by Inkfinite98
All Bark No Bite (UnderfellPapyrus X Reader)
Inkfinite98
  • Reads 5,532
  • Votes 278
  • Parts 29
You run away from a past that should be forgotten, you accidentally fall into a world that you couldn't imagine. Are you truly safe? Or are you in even more danger than you bargained for?