Undertale Alternate Universes FanFiction

UnderWatcher Part I

UnderWatcher Part I

F/F
F/M
Gen
M/M
Multi
Other
G
Updated
11.04.2025
Fandom
Undertale (Video Game)
Characters
Frisk (Undertale)
Tags
Alternate Universe POV Alternating Alternate Universe - Undertale Multiverse | UTMV (Undertale) Alternate Universe - UnderWatcher (Undertale) Undertale Alternate Universes Reader Is Not Frisk (Undertale) Reader Is Not Chara (Undertale) They/Them Pronouns for Frisk (Undertale) Adult Themes
This is the story of UnderWatcher, an Undertale AU created by me, WylohWist. In part I, you'll follow the story alongside the character and learn about this world, its characters, its history, and its future. (Please note that tags will be updated al...
Esqueletos y Magos [UTMV x Harry Potter] [Vol. 1]

Esqueletos y Magos [UTMV x Harry Potter] [Vol. 1]

Other
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling Undertale (Video Game)
Characters
Harry Potter, Sans (Undertale), Nothing - Relationship
Tags
Hogwarts Good Friend Ron Weasley Alternate Universe - Underfell (Undertale) Alternate Universe - Harry Potter Setting Dreamtale Nightmare Sans (Undertale) Error Sans (Undertale) Dreamtale Sans | Dream (Undertale) Undertale Alternate Universes Dusttale Sans (Undertale) _____tale Sans | Ink (Undertale) Killer Sans (Undertale) Xtale Sans | Cross (Undertale)
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The Factory Of Ideas

The Factory Of Ideas

G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling Marvel Spider-Man - All Media Types
Characters
Harry Potter, Midoriya Izuku, Aizawa Shouta | Eraserhead, Clay | Dream (Video Blogging RPF), Technoblade (Video Blogging RPF), Technoblade's Chat (Video Blogging RPF), TommyInnit (Video Blogging RPF), Toby Smith | Tubbo, Wilbur Soot, Ranboo (Video Blogging RPF), Albus Dumbledore, Wednesday Addams,
Tags
Alternate Universe - Canon Divergence Crack Fluff and Angst Temporary Character Death Time Loop Cross-Posted on Wattpad Alternate Universe - Reincarnation Rebirth LGBTQ Character Platonic Relationships Alternate Universe - Time Travel Isekai
Idea Factory! Get your free fanfic ideas/prompts here! Comprised of adoptable ideas that I want to share. Feel free to adopt them as long as you give me credit for the original ideas.Undertale AUs/multiverses, DSMP, MHA/BNHA, LGBT+, Harry Potter, Son...