Papyrus (Undertale) FanFiction

The Discovery

The Discovery

F/F
F/M
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Original Undertale Character(s), Sans (Undertale)/Reader, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale)
Tags
Alternate Universe - Underfell (Undertale) Babybones (Undertale)
Little one shot for the Babybones universe! Alphys and Undyne make a discovery
Over Hill and Under Hill

Over Hill and Under Hill

F/F
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), W. D. Gaster, Papyrus & Sans (Undertale), W. D. Gaster & Papyrus & Sans, Alphys & Sans (Undertale), Alphys & W. D. Gaster, Ashley/Brooke, Ashley & papyrus,
Tags
Fluff Angst Found Family Will add tags as I go do not know what im doing or how to tag this ashley and brooke will be in a qpr at some point might take a while lol also i wanna (and will) include the pines family from gravity falls but ill tag them when they show up have patience im a bit dumb gaster referred to as wings
An overtale Undertale AU thats a bit different, the main undertale cast (sans and the rest) live on the surface and frisk and chara live in the underground (and are also twins)story is from Ashley's pov (shes an oc) and Shift's pov (out of universe n...
A Guide To Getting Rid Of Skeleton Suitors

A Guide To Getting Rid Of Skeleton Suitors

F/F
F/M
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Original Characters, Reader, Sans (Undertale)/Reader, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Papyrus (Undertale)/Reader
Tags
Unrequited Love Eventual Romance Reader-Insert Minor Original Character(s) Enemies to Lovers Post-War Original Character Death(s) Roommates Alternate Universe - Swapfell (Undertale) Swapfell Sans (Undertale) Swapfell Papyrus (Undertale) Reader is AFAB - Freeform
You were just starting over after a terrible beginning at life,"Everything is going to be great from now on!" You said. You forgot to knock on wood and apparently Murphys law heard you.....Two bone heads come knocking on your door wanting to reconnec...
It's Not Too Late (Male Reader Edition)

It's Not Too Late (Male Reader Edition)

F/F
M/M
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Reader, Chara (Undertale), Frisk (Undertale), Sans (Undertale)/Reader, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), W. D. Gaster, Sans/You, Sans/Male Reader,
Tags
Slow Burn Friends to Lovers Humor PTSD lots of fluff male reader - Freeform And angst mentions of self harm Mentions of Suicide monster hate groups Reader is male You like kidnapping?
You haven't had an easy life. The mistakes you've made have carved literal scars into your mind and body. A precious life was lost because of you. But now you've moved to a new city, trying to leave all that behind you. You've got a promising new int...
Fŕįßk Jane đřēæmèr Potter

Fŕįßk Jane đřēæmèr Potter

Gen
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling Undertale (Video Game)
Characters
Original Characters, Harry Potter, Minerva McGonagall, Severus Snape, Ron Weasley, Hermione Granger, Ginny Weasley, Fred Weasley, George Weasley, Albus Dumbledore, Chara (Undertale), Frisk (Undertale),
Tags
Character Bashing Albus Dumbledore Bashing Manipulative Albus Dumbledore Female Frisk (Undertale) Harry Potter Has a Twin Harry Potter Has a Sibling Frisk doesn't like Dumbledore
Lily and James had three children their oldest Jake Potter, their hair, th middle child Harry Potter, the boy who lived and the youngest Frisk Jane Potter known to the Wizarding world as Jane Lily PotterThis story starts in Frisk's first year at hogw...
PLEASE

PLEASE

F/F
F/M
M/M
Other
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Reader, Frisk (Undertale), Sans (Undertale)/Reader, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Asriel Dreemurr, Papyrus & Sans (Undertale), Toriel (Undertale), Mettaton (Undertale),
Tags
Alternate Universe - College/University Español | Spanish Soulmates First Love Love at First Sight Homosexuality Heterosexuality reader is a baddie sans is in love so bad tee hee
Dentro del subsuelo habían reglas no escritas, reglas que no necesitaban ser gritadas o señaladas para que se siguieran.Pero en la superficie todo parecía tan complejo, hasta las relaciones humanas eran complejas. ¿Es que acaso no existía las almas g...
Interdimentionality Compromised: This Shit Again

Interdimentionality Compromised: This Shit Again

F/F
F/M
M/M
G
Updated
12.04.2025
Fandom
Undertale (Video Game) Miraculous Ladybug Video Blogging RPF
Characters
Original Female Character(s), Original Male Character(s), Wade Wilson, Amamiya Ren (Persona Series), Adrien Agreste | Chat Noir, N (Murder Drones), Papyrus (Undertale), Discord (My Little Pony: Friendship is Magic), Bendy (Bendy and the Ink Machine), The Collector (The Owl House), Hat Kid (A Hat In Time), Natsuki (Doki Doki Literature Club!),
Tags
Game Shows Reader-Interactive You Decide Who Wins! Character Elimination Cinematic Universe
Light and Dark are supposed to be polar opposites, but what if two beings from each side came together?...Well these two idiots would make a show of course!A multidimensional show, where you select the winner!Inpired by many others.Do enjoy, CIAO!
Close As Can Be

Close As Can Be

F/F
F/M
M/M
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Frisk (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Papyrus (Undertale)/Reader, Toriel (Undertale), Mettaton (Undertale), Asgore (Undertale), Some OCs idk
Tags
Slow Burn Kind Of Cliche Female Reader Nonbinary Frisk Reader Is Not Frisk Fluffy fic idk its a work in progress
Pureview Valley, the not-that-tiny town just East from Mount Ebott, is home to simple people and monsters alike after monsters escaped the underground 5 years ago. People come here to live peaceful lives when the big city near the mountain becomes to...
undertale asks and dares !!

undertale asks and dares !!

F/F
F/M
Gen
M/M
Multi
Other
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Chara (Undertale), Frisk (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Asriel Dreemurr, Nice Cream Vendor (Undertale), Toriel (Undertale), Mettaton (Undertale), Flowey (Undertale), Grillby (Undertale),
Tags
Romance Other Ships Not Mentioned in Tags Prompt Fic LGBTQ Character LGBTQ Themes Pride Platonic Relationships Askbox Fic Comment Fic
rules in first chapterinspired by The1andonly_soup !!a lot of these are headcanons lmao
Where the Lost Become Found

Where the Lost Become Found

Gen
G
Updated
18.04.2025
Fandom
Harry Potter - J. K. Rowling Undertale (Video Game)
Characters
Harry Potter, Tom Riddle | Voldemort, Chara (Undertale), Frisk (Undertale), Original Undertale Character(s), Sans (Undertale), Papyrus (Undertale), Toriel (Undertale), Flowey (Undertale), Harry Potter & Sans (Undertale), Frisk (Undertale) & Harry Potter, Harry Potter & Toriel (Undertale)
Tags
Family Fluff Past Child Abuse Tooth-Rotting Fluff Child Abandonment Protective Harry Potter Harry Potter is a Horcrux Harry Needs a Hug Harry Potter-centric Adopted Harry Potter Horcrux Tom Riddle and he gets one Toriel Adopts Harry
Harry is abandoned on Mt. Ebott by his aunt. Toriel left her husband after their two children died. Alone, they are broken and lost souls. Together, they are a family. (A Toriel raises Harry fanfic.)
Undertale Rant

Undertale Rant

F/F
F/M
Gen
M/M
Multi
Other
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Chara (Undertale), Sans (Undertale)/Reader, Sans (Undertale), Papyrus (Undertale), Asriel Dreemurr, W. D. Gaster, Papyrus (Undertale)/Reader, Toriel (Undertale), Sans/Sans (Undertale), Frisk/Sans (Undertale), Asgore Dreemurr/Toriel, Asgore Dreemurr,
Tags
Dirty Talk Death Anger Love/Hate Talking Cussing Rants Sins Threats Pulling about the Fandom
Well, Well, well...Your in the Undertale Fandom...Alright, read on if you dareThis ain't a StoryThis is a RANTUndertale's Fandom NEEDS thisPeople need to see how fucked up this Fandom REALLY is...So...Choose, skip this book, or read it...
Unexpected Encouters

Unexpected Encouters

F/F
F/M
Multi
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Original Female Character(s), Sans (Undertale), Papyrus (Undertale), Sans (Underfell), Papyrus (Underfell), Sans (swapfell), Papyrus (Swapfell), Sans (Underswap), Papyrus (Underswap), G!Sans
Ummm.... not really sure what to put here.... Hmmm.... Just another undertale fanfic with my own original OCs thrown into the mix.... when I think of a better summary I will definitely change this 🤣I will update tags and such as I go along
𝐏𝐀𝐍𝐃𝐄𝐌𝐎𝐍𝐈𝐔𝐌

𝐏𝐀𝐍𝐃𝐄𝐌𝐎𝐍𝐈𝐔𝐌

F/F
F/M
Gen
M/M
Multi
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Reader, Chara (Undertale), Original Undertale Character(s), Sans (Undertale)/Reader, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Sans (Undertale) & Reader
Tags
Reader-Insert Wine Demon Summoning Demon/Human Relationships Reader is tired Reader Is Not Frisk (Undertale) Reader Is Not Chara (Undertale) Reader is an artist sans x reader undertale - Freeform Undertale AU Undertale Monsters on the Surface
" Pandemonium "(𝚗.)𝟷. 𝚠𝚒𝚕𝚍 𝚊𝚗𝚍 𝚗𝚘𝚒𝚜𝚢 𝚍𝚒𝚜𝚘𝚛𝚍𝚎𝚛 𝚘𝚛 𝚌𝚘𝚗𝚏𝚞𝚜𝚒𝚘𝚗; 𝚞𝚙𝚛𝚘𝚊𝚛.𝟸. 𝚝𝚑𝚎 𝚊𝚋𝚘𝚍𝚎 𝚘𝚏 𝚍𝚎𝚖𝚘𝚗𝚜 𝚊𝚗𝚍 𝚊𝚕𝚕 𝚎𝚟𝚒𝚕 𝚜𝚙𝚒𝚛𝚒𝚝𝚜; 𝚑𝚎𝚕𝚕.You wanted to forget about your grief and summoned a demon on pure accident. Turns out, he now has an ulterior motive. Sans may be a...
Quantumtale After Life

Quantumtale After Life

F/F
F/M
M/M
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Original Characters, Chara (Undertale), Frisk (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), W. D. Gaster, Flowey (Undertale), Frisk/Sans (Undertale), Asgore Dreemurr/Toriel,
Tags
Alternate Universe - Quantumtale (Undertale) these are just short stories from that universe it's a bit different Female Frisk (Undertale) Frisk doesn't go back in time they just rewind the ages kind of It's mainly about Frisk and Sans They will progress in age in this Frisk is sometimes a sad bean
After a wrong RESET Frisk and Flowey got sent back in time when all her friends were around her age. The souls have been scattered around the Underground and they keep messing with time. After this RESET Sans is now able to control time. Frisk has ma...
METANOIA

METANOIA

F/F
F/M
Gen
Multi
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Chara (Undertale), Frisk (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Papyrus & Sans (Undertale), Toriel (Undertale), Frisk/Sans (Undertale), Asgore Dreemurr/Toriel, Asgore Dreemurr, Chara & Sans (Undertale), Chara & Papyrus (Undertale),
Tags
Implied/Referenced Child Abuse Panic Attacks Death Alcohol Alcohol Abuse/Alcoholism mentions of abuse Alternate Universe - Swapfell (Undertale) Overdose trigger warning Undertale AU Swapfell Swapfell Nether
*The golden flowers must have broken your fall.   It took one wrong step and Chara found themselves hurtling into the caverns below, caverns overrun by monsters who’ll do anything to claw their body apart and take their Soul. Cruelty tainted their...
Mad as a Hatter

Mad as a Hatter

F/F
F/M
M/M
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Chara (Undertale), Frisk (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Asriel Dreemurr, Toriel (Undertale), Mettaton/Papyrus (Undertale), Frisk/Sans (Undertale), Asgore Dreemurr/Toriel,
Tags
Alternate Universe - Underfell (Undertale) Victorian era Female Frisk (Undertale) Adult Frisk (Undertale) Female Chara (Undertale) Adult Chara (Undertale) Alternate Universe - Wondertale
She always felt she was different from the other people..however she never expected to be MADDER THAN A HATTER as she fell down that hole chasing a weird white rabbit. She will meet all kinds of people down in this fantastic world she discovered...th...
Upside-down

Upside-down

F/F
F/M
M/M
G
Updated
12.04.2025
Fandom
Undertale (Video Game)
Characters
Chara (Undertale), Frisk (Undertale), Original Undertale Character(s), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Asriel Dreemurr, W. D. Gaster, Toriel (Undertale), Mettaton/Papyrus (Undertale), Frisk/Sans (Undertale),
Tags
Female Frisk (Undertale) Adult Frisk (Undertale) Female Chara (Undertale) Adult Chara (Undertale) Alternate Universe - Overtale (Undertale) humans stole the monster magic and now they inherit it
Frisk is a monster that lives on the surface, however she always heard about the humans trapped underground after they stole their ability to use magic in the Great War...however Frisk is curious. As she was climbing up Mt. Ebbot trying to pick some...
Just another coffee shop.

Just another coffee shop.

F/F
F/M
M/M
G
Updated
12.04.2025
Fandom
Undertale (Video Game) Eddsworld - All Media Types Deltarune (Video Game)
Characters
Vaggie (Hazbin Hotel), Sans (Undertale), Papyrus (Undertale), Ralsei (Deltarune), Baldi (Baldi's Basics), Susie (Deltarune), Charlie Magne, Edd (Eddsworld), Tom (Eddsworld)
Tags
Original Character(s) Reader-Insert
This was a story I made on wattpad but never got to finish. The first chapter was copy-pasted from the original, and the rest is original.This is ass. and old.
Monsters In The Forest

Monsters In The Forest

F/F
F/M
M/M
G
Updated
13.04.2025
Fandom
Undertale (Video Game) Pocket Monsters | Pokemon - All Media Types
Characters
Original Characters, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Asriel Dreemurr, W. D. Gaster, Original Character & Original Character, Papyrus & Sans (Undertale), W. D. Gaster & Papyrus & Sans, Sans/Sans (Undertale), Asgore Dreemurr/Toriel, Asgore Dreemurr,
Tags
Body Dysphoria Dysfunctional Family Other Additional Tags to Be Added Miscommunication I Wrote This Instead of Sleeping Misunderstandings Why Did I Write This? Gender-Neutral Pronouns Pokemon Pokemon Battles Pokemon Trainers Dysphoria
To the outsiders, Mount Ebott, the deep forest and its beach side was cursed. Otherworldly monsters, mythical and powerful beastly monsters at that, roamed the land and caused most of the forest and mountain to be closed off from the outside world an...
ExperimentTale

ExperimentTale

F/F
F/M
M/M
G
Updated
13.04.2025
Fandom
Undertale (Video Game)
Characters
Original Characters, Chara (Undertale), Frisk (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Asriel Dreemurr, W. D. Gaster, Toriel (Undertale), Mettaton (Undertale),
Tags
Other Additional Tags to Be Added Alternate Universe - Medieval Female Frisk (Undertale) Adult Frisk (Undertale) Female Chara (Undertale) Adult Chara (Undertale) experiment frisk The Surface (Undertale) but it has modern technology kind of modern age? there is some bad language but it's minor a bit of PTSD involved
The monsters never knew what awaited them on the surface...or what would happen when Frisk, the last human to fall, would enter their lives. One of these monsters was Sans who was the first to be thrown off the rails of his usual resets. But somethin...