Alphys/Undyne (Undertale) FanFiction

11.04.2025

Undertale (Video Game)

Original Undertale Character(s), Sans (Undertale)/Reader, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale)

Alternate Universe - Underfell (Undertale) Babybones (Undertale)

11.04.2025

Undertale (Video Game)

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,

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

11.04.2025

Undertale (Video Game)

Original Characters, Reader, Sans (Undertale)/Reader, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Papyrus (Undertale)/Reader

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

11.04.2025

Undertale (Video Game)

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,

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?

11.04.2025

Undertale (Video Game)

Alphys/Undyne (Undertale), Sans (Undertale), Papyrus & Sans (Undertale), Sans/Sans (Undertale), Mettaton/Papyrus (Undertale), errorink(mentioned), kustard(mentioned), Skeleton(s) (Undertale)

Fluff and Humor Established Relationship idk how to tag fucking with the originals they think they going crazy

11.04.2025

Undertale (Video Game)

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),

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

12.04.2025

Undertale (Video Game)

Alphys/Undyne (Undertale), Alphys (Undertale)

Post-Undertale Neutral Route Undertale Neutral Route Queen Alphys (Undertale) Cross-Posted on Tumblr

12.04.2025

Undertale (Video Game)

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

Slow Burn Kind Of Cliche Female Reader Nonbinary Frisk Reader Is Not Frisk Fluffy fic idk its a work in progress

12.04.2025

Undertale (Video Game)

Alphys/Undyne (Undertale), Undyne (Undertale), Alphys (Undertale), Alphys & Undyne (Undertale)

12.04.2025

Undertale (Video Game)

Reader, Chara (Undertale), Original Undertale Character(s), Sans (Undertale)/Reader, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Sans (Undertale) & Reader

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

12.04.2025

Undertale (Video Game)

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,

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

12.04.2025

Undertale (Video Game)

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),

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

12.04.2025

Undertale (Video Game)

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,

Alternate Universe - Underfell (Undertale) Victorian era Female Frisk (Undertale) Adult Frisk (Undertale) Female Chara (Undertale) Adult Chara (Undertale) Alternate Universe - Wondertale

12.04.2025

Undertale (Video Game)

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),

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

13.04.2025

Undertale (Video Game) Pocket Monsters | Pokemon - All Media Types

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,

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

13.04.2025

Undertale (Video Game)

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),

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

13.04.2025

Undertale (Video Game)

Frisk (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Toriel (Undertale), Asgore Dreemurr/Toriel, Asgore Dreemurr

prompts

13.04.2025

Undertale (Video Game)

Chara (Undertale), Frisk (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), W. D. Gaster, Toriel (Undertale), Mettaton (Undertale), Flowey (Undertale), Asgore Dreemurr/Toriel,

Other Additional Tags to Be Added Eventual Romance Alternate Universe - Soulmates Eventual Relationships Eventual Fluff Soulmates Gaster is aware Lunaris [OC] has special abilities Alternative Reality Traveling this fic is long Lunaris is a human who can shift into a monster soulbound

13.04.2025

Undertale (Video Game)

Frisk (Undertale), OC/OC, Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), Asriel Dreemurr, Toriel (Undertale), Grillby (Undertale), Asgore Dreemurr, Sans/Raven (OC),

Our Accident is Life's Intention (Side Stories) Actual Tags and Warnings in Notes 1 - Happy 24th Birthday 2 - Valentine's Day

13.04.2025

Undertale (Video Game)

Chara (Undertale), Frisk (Undertale), Alphys/Undyne (Undertale), Sans (Undertale), Papyrus (Undertale), Undyne (Undertale), Alphys (Undertale), W. D. Gaster, Toriel (Undertale), Mettaton (Undertale), Asgore Dreemurr

Depression Suicidal Thoughts Other Additional Tags to Be Added Hurt/Comfort Recovery Post-Traumatic Stress Disorder - PTSD Nightmares Self-Harm Suicide Attempt Child Abuse I promise Insomnia