Undyne Stories

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1.2K Stories

Ursa Major (Sans X Reader) by Im_SANSational
#1
Ursa Major (Sans X Reader)by Im_SANSational
It had been a couple months since your little sister went missing. Guess how surprised you were to see her on the news with the headline "Young Girl Helps Monsters...
  • sans
  • fluff
  • frisk
+15 more
Sans' House Guests (CreepyPasta x Undertale) by BubblyShip
#2
Sans' House Guests (CreepyPasta x...by BubblyShip
The surface was not what Sans thought it would be. Lack of communication skills, communication in general, and social interaction had driven him into a depressed and anx...
  • eyelessjack
  • sallywilliams
  • toriel
+9 more
Undertale Au's x reader and deltarune maybe lemon by galaxywolf808
#3
Undertale Au's x reader and deltar...by Galaxywolf808
Oh god I'm full of regret but idfc so yay I shall do yandere and lemon of course:p get ready for the skele dicks (͡° ͜ʖ ͡°) (͡° ͜ʖ ͡°) (͡° ͜ʖ ͡°)
  • ralsei
  • deltarunexreaderlemon
  • blueberry
+18 more
'Sick At Heart' - Flowey x Reader by TheSerratedThorn
#4
'Sick At Heart' - Flowey x Readerby Spooky~
Hey, all! Since my first x reader went great, and had to end; I decided that I should start another one. For those of you who read my previous book: 'Seeds Of Love', and...
  • imrunningoutofideasfortags
  • mettaton
  • asgore
+15 more
Undertale x Infant!Reader by raac24
#5
Undertale x Infant!Readerby ~Raac~
Taking a journey through the Underground seems fun to experience and to Fight or Act through. But is it really fun when you're just an infant? Will you ever make it back...
Completed
  • journey
  • napstablook
  • xreader
+14 more
Begin Again (Sans X Older!Frisk) by GennacideWrites
#6
Begin Again (Sans X Older!Frisk)by Gennacide
COMPLETE *This story takes place after an ending in which everyone is alive but they cannot reach the surface*
Completed
  • battle
  • frisk
  • sansxfrisk
+14 more
inSANSity by MagesticalRose
#7
inSANSityby MagesticalRose
Warning: Contains dark and sensitive topics such as: Suicide, insanity, mental illness, death, and so on. Also may have a bit of gore, so don't read if you have a weak s...
  • flowey
  • fanfiction
  • suicide
+16 more
~Undertale Tickle Shorts~ by punmastr_7
#8
~Undertale Tickle Shorts~by Depresso mode
|Story Requests: Closed. |~Cover created by @didibelieber3013~| |Highest Ranking: #768 in Fanfiction| A book filled with adorable and clever short stories, including...
  • papyrus
  • fanfiction
  • tickletale
+17 more
Not Just Evil (Underfell Papyrus X Reader) by TheIndianaCrew
#9
Not Just Evil (Underfell Papyrus X...by Indiana
Underfell Papyrus is viewed as one of the most ruthless monsters in the underground but what is really under that tough persona? Thanks to Tamqul on Deviantart for letti...
Completed
  • fluff
  • angst
  • romance
+18 more
Undertale X Reader - Hiatus by IcyDuelist
#10
Undertale X Reader - Hiatusby Willow Pines with Rainbow Eyes
One shots (or parts) with Undertale characters! Cause LIFE! No media belongs to me unless specifically said ITS ON HIATUS CAUSE ZILCH MOTIVATION ;-;
  • lovethis
  • wtfisthis
  • undertale
+11 more
Promises {Jevil X Reader} by pastelNebulagazer
#11
Promises {Jevil X Reader}by pastelNebulagazer
【𝐀 𝐩𝐫𝐨𝐦𝐢𝐬𝐞 𝐭𝐡𝐚𝐭 𝐰𝐚𝐬 𝐩𝐚𝐬𝐬𝐞𝐝 𝐝𝐨𝐰𝐧 𝐟𝐨𝐫 𝐜𝐞𝐧𝐭𝐮𝐫𝐢𝐞𝐬, 𝐜𝐞𝐧𝐭𝐮𝐫𝐢𝐞𝐬】 【𝘈𝘯𝘥 𝘢 𝘭𝘰𝘷𝘦 𝘵𝘩𝘢𝘵 𝘸𝘪𝘭𝘭 𝘯𝘦𝘷𝘦𝘳 𝘤𝘩𝘢𝘯𝘨𝘦】 ~ ...
  • undyne
  • ralsei
  • papyrus
+18 more
undertale sans x reader oneshots (english) by Nightcorehead
#12
undertale sans x reader oneshots (...by Nightcorehead
well this is my first x reader book hope you guys like it i accept request
  • xreader
  • sans
  • papyrus
+6 more
Burnt to the Touch || Grillby x Reader by NotXoshi
#13
Burnt to the Touch || Grillby x Re...by Lazarus
Humans and monsters had come to a truce, letting them visit each other's world a week each month, what happens when one human misses the gates closing, and gets trapped...
Completed
  • papyrus
  • sans
  • undertalefanfic
+5 more
The Toughest (Undyne x Male!Reader) by SO-MUCH-CHAOS
#14
The Toughest (Undyne x Male!Reader)by what?
You had met your bestie Undyne when you were both kids. As you got older, she started to drift away. One night, Undyne shows up on your doorstep in tears. Little do you...
  • undertale
  • undyne
Storyshift (Charisk) by Wasted_Arsonist
#15
Storyshift (Charisk)by Gunnar Årud
Just what you'd expect. Pardon my lack of knowledge about this AU. I just like the concept. Both Frisk and Chara are girls. Characters may use absolutely differen...
  • mettaton
  • girlongirl
  • undertale
+17 more
Little Lyrebird(G!Sans x Reader) by xXDiabolicEnigmaXx
#16
Little Lyrebird(G!Sans x Reader)by XxDiabolicEnigmaxX
He created me to become the people's art. But he has only created the perfect weapon. (Cover drawing is not mine)
  • mafiatale
  • gaster
  • papyrus
+8 more
(Y/N) is Online by Kirbycake321
#17
(Y/N) is Onlineby Kirbycake321
Paperjam, Chara, Undyne, Fresh, Nightmare, Error, and Cil get a notification on their phones. (Y/N): You remember me, don't you?
  • naj
  • paperjam
  • fresh
+10 more
One By One (COMPLETED)(A UnderTale Genocide Story) by BubblyShip
#18
One By One (COMPLETED)(A UnderTale...by BubblyShip
(UnderTale completely belongs to Toby Fox, I in no way helped him create the game. I'm just simply a huge fan and want to write a short Genocide route fanfiction. Also...
  • undertale
  • grillby
  • genocide
+11 more
Her (Sans X reader) by AddisynDaKilla
#19
Her (Sans X reader)by ٩( ᐛ )و
It's kind of a Sans x reader. I named the character. Oops. Welp, here we go! This has potential I promise. Just give it a chance. Please.
Completed
  • sans
  • flowey
  • ofc
+11 more
Lights Like Stars (Sans x Reader) by SebbyBear
#20
Lights Like Stars (Sans x Reader)by SebbyBear
It's been over a year since the Underground opened up and the monsters living under the earth swarmed to the surface in their thousands. The human and monster governmen...
  • lights
  • ptsd
  • dreemur
+16 more