Undertale AU's and x readers
12 stories
The Triplets A Undertale Short Story by xbutterfly_walkerXx
xbutterfly_walkerXx
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    Parts 8
Three boys, abandoned living on there owns. They must learn how much they learn that they all need eachother
Love Me Instead [Sans VS Gaster!Sans X Reader] (EDITING) by PineappleGalore001
PineappleGalore001
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    Parts 55
When a mishap in a reset happens and a character from another version is transported into the current world and timeline, what happens? Gaster!Sans, bad-skele-boy from EchoTale is confused to see that he had landed in a different, yet familiar world: Undertale! Apparently, in meeting with his 'original' version, they seem to be OK with one-another, UNTIL... (Thank you, @yourebluenow for the cover!) Book 2 Is here! it has the same name and cover, but with 'Part 2' in the title! https://www.wattpad.com/story/70011017-love-me-instead-sans-vs-gaster-sans-x-reader-part
Fresh Sans X Reader (Being Rewritten) by ghostlyEclipse
ghostlyEclipse
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    Parts 10
You were created a long time ago, by Ink, to be his successor after his sudden disappearance. You were left within a distant void that is hardly in contact with other worlds--thus relatively hard to enter. But one day, Error finds your world and is ready to destroy you the moment he gets his hands on your soul. Falling into a new AU while trying to escape him, you may have met your soul mate. **This story is currently being rewritten! The plot line stays just about the same, the only thing I'd say changes a whole lot is the quality of the story itself.
(Sans x Reader) When Two Souls Meet by ZanaBSparrows
ZanaBSparrows
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    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.
Gold's Eye GasterSans X Reader by xbutterfly_walkerXx
xbutterfly_walkerXx
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    Parts 25
You've heard the stories, of the mysteries of a man who guides lost ladies home by night legend says his voice is like a demon of hell and anyone who's ever approached him has died. One night you get lost and you uncover his real story
Lil Reader X AU! Sans, Chara, and Frisk by Tami-The-Writer
Tami-The-Writer
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    Parts 42
Your names (Y/N). Your an adult, well, not until you landed in a white void. You were now a cute smol child. Seriously your shorter than Sans and Frisk. Jesus Let's see how this turns out.. [[STORY IS ALSO ON QUOTEV]]
Brotherly Love[Underlust!Sans x child!reader] by SoupKin
SoupKin
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    Parts 12
Their cold, dead eyes stared at yours. Why hadn't you done anything...? "I Hate You." [cover art doesn't belong to me, I just edited it]
L.O.V.E Hurts Love Heals [Sans X Child Reader] by DragonHybrid
DragonHybrid
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    Parts 5
A child and their friends decided to explore to fill their bored minds. Accepting a challenge they sneak away to Mt. Ebbot. Their exploration ended rather quickly when the one fell into the empty void they had found. The fallen child's name was... (Your Name). No, the cover isn't drawn by me. (Please message me if you know who. I'll give the credit to them.)
Yandere sans x Child reader by Kawaiifluffsenpai
Kawaiifluffsenpai
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    Parts 4
WILTED: A Sans X Child Reader Story by Yusuka-chan
Yusuka-chan
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    Parts 49
[I have decided to do what I always wanted 😄😄]:some people put warnings for these so.....CHILD ABUSE IS DISCUSSED You were, thought to be mute and was horribly abused by your mother and because of the psychological trauma , you can't bring yourself to trust people......youve fallen and you find yourself alone...until a punky skeleton decides to take you in and raise you himself. Maybe this is just what you need and you'll be able to finally warm up to others, or maybe it won't be that easy and there will be struggles along the way. 💖Just as dew refreshes the wilting flower, tenderness restores the grieving heart.💖