Gaster Stories

Y.N. Gaster one of Ozpins best friends. But soon to be enemy. Due to there differences Ozpin trapped Y.N. in the void where he stayed for years. Y.N. had tried many times to escape but ends up failing. But then one day he had enough energy to break free the only problem was that no one could see him. He was alone for so long until one day a little was able to see him and that someone was a little girl named ruby rose.

Your favorite skeleton is back at it again... and again... agagaagaag Sans has had enough. Everyone is at the surface, holding their own jobs and lives. But... Sans can't ever let it fade from his mind. The dust. The cries. Watching the screen with Alphys as a child just rampaged in the underground. He is going to snap. He is mad. He is sad. He can never forget. Cover is NOT mine, find it online if you want ::Rights for the original concept and media 'Undertale' are all under the jurisdiction of Toby Fox. All other workings are done by me.::

A Small child named Y/N L/N was born into this world with holes in his hands and because of this was abandoned long ago. for years he wandered the thick wilderness of patch island until he met someone who took him in. I Don't own Undertale or RWBY they belong to their respective owners.

What if the Vessel that we made was saved? What if we were able to forge our own fate? How will this change what will happen? Only time shall tell...

This story takes place after the events of the pacifist ending of Undertale, where all the monsters have already left the underground. However, that won't stop problems from starting again; Frisk and his friends will have to face a new threat. DISCLAIMER: This story is based on the fact that the first human fell underground in 2015 and the last in 2060. Here, Deltarune is a sequel to Undertale; therefore, Posttale is not a copy of TobyFox's creation, but an adaptation, or what is also called an "AU." Because of this, there will be things that are different from canon and adapted to my personal preference, with no intention of disrespecting anyone; for example, the gender of the humans: Kris: M Chara: F Frisk: M Don't like it? You can leave. Understood? Great. Contributors: @Fwrevy #Deltapad • Undertale and Deltarune are property of Toby Fox. • Images used in the story are property of their respective owners or made with AI. *#27 in the "Undertale" category 6/13/2026* *#3 in the "Deltarune" category 3/3/2026*

A Deltarune fanfiction taking place across multiple years, before Dess' disappearance. A coming-of-age horror story with Dess and Asriel as protagonists. This fanfiction will take inspiration from, but may not be entirely faithful to, Chapters 1-5 of Deltarune, and may be influenced by future chapters, while maintaining its own identity, lore and story. - CONTENT WARNING: Gore, Death, Sexual themes: including sexual orientation and attraction, gender identity; and potentially explicit scenes, both explicitly sexual content and more psychological-horror and body-horror oriented content. If, for any reason, you are uncomfortable with any of the aforementioned, it is advised that you don't read this. - The story will be translated in Italian as new chapters get released, but it may take a while. The English version will always be updated first if the Italian version is on par, otherwise the translation of already published chapters will take the priority over the release of new material. - Written by: Mourning Star Characters and Setting from Deltarune (Created by Toby Fox) Cover Art by: pomb-o Any additional artwork featured in any of the chapters will be credited No AI will be used in the writing or the art

The story officially begins when Toriel dies in her universe mysteriously. Gaster with his allies show up and take her soul remains back to his lab to save her life. Toriel then had DETERMINATION injected into her. Most of the DETERMINATION was collected from humans in multiple different universes. Gaster created the perfect solution to end RESETs and genocide routes that plague The Multiverse. A new kind of boss monster with the ability to utilize the power of the savestar. Toriel, who got reborn as Gaster's daughter in his lab due to a serious situation that happened, it was the only way to save her life. Gaster embarks on his quest to bring peace to The Multiverse. However The Savestar becomes corrupt, doing more than its intended function. If the RESET function is over-worked, it will erase a universe. The more universes that are gone, the more The Multiverse dies. They explore every universe they're able to, attempting to fix the savestar and rid the ability to RESET, helping others and themselves. ---- Note: This AU has themes such as Suicide, frequent swearing, mentions of needles and more medical equipment. Be careful upon reading incase you are sensitive to these topics! Also moments in the story of characters smoking and mentions of Alcohol. Note: All 7 of the finished Chapters are published. Chapter 8 will start in 2026. The AU is still in progress. Enjoy. UnderVanquish has two creators: SoulerClash and C!rquette. Co-Writers: Capt.Gunscar, Eversius, JK, Darkswaver, Hollow and Marble. UnderVanquish-Comic Creators: SoulerClash,Hollow and Marble. UnderVanquish-Game Creator: SoulerClash. Update: March 2026/Comic is not going to happen for a while but there is an UnderVanquish game in progress and it will be massive, same amount of chapters as the fanfic and each chapter will be a game. Chapter 0 which is prologue is getting new lore. Chapter 8 is going to be delayed. I will enter new content sometime this year once I have enough content done.

A self insert of the author of this story turns into a self aware Dreepy with all his memories intact in the Pokemon Mystery Dungeon universe but instead of becoming a hero that does dungeon crawling, he becomes a dishwasher in Spinda's Cafe where the story turns into a surreal workplace sitcom full of: fourth wall breaking, reality warping nonsense, and pure internet humor. IBADTADITPU may include:

I haven't used this account since I was 13 years old why not return to post Pirate Gaster Fanfiction?

Short Summary: An Undertale AU, which is a crossover with my The Last Star Seeker series. Long Summary: A young human girl falls into the underground. After being caught and taken up to the castle, they face their judgment. Little did everyone know that this girl had magic like all monsters. The king decides to SPARE her in hopes that she could break the barrier without having to take more souls. Years pass, and Astrella hasn't figured out how to break the barrier, but when she sleeps, she's given messages that shake her to the bone. So, with the help of a funny skeleton, they solve the mystery together and maybe more about themselves too. Yes, this is an oc x canon story 👀

This is a senario book including : Undertale Sans, Underfell Sans, Underswap sans, Gaster! Sans, Outertale Sans, Ink! Sans, Error Sans and last but not least Fresh Sans! There is probably going to be some profanity. Comment about any sans you want added and I might add them! (also located on my quotev)

WATTPAD IS THE ONLY SITE THIS BOOK SHOULD BE ON. You are an ex-military 21 year old girl. You and your sister Frisk are on a hiking trip. What happens when you find yourself in a earth quake and fall in a giant hole? who will you meet?......Read to find out! (A/N) I don't really know much about Gaster sans and others but I try XP (A/N) *Bloody hell! I suck at introductions! but may I say I think I did good! bye Lovelies, and enjoy!

☜︎☠︎❄︎☼︎✡︎ ☠︎🕆︎💣︎👌︎☜︎☼︎ 📂︎🖮︎ 👎︎✌︎☼︎😐︎📪︎👎︎✌︎☼︎😐︎☜︎☼︎📪︎✡︎☜︎❄︎ 👎︎✌︎☼︎😐︎☜︎☼︎ ❄︎☟︎☜︎ 👎︎✌︎😐︎☠︎☜︎💧︎💧︎ 😐︎☜︎☜︎🏱︎💧︎ ☝︎☼︎⚐︎🕈︎✋︎☠︎☝︎ 👎︎☜︎☜︎🏱︎☜︎☼︎ ❄︎☟︎☜︎ 👎︎✌︎☼︎😐︎☠︎☜︎💧︎💧︎ 👍︎🕆︎❄︎❄︎💧︎ ❄︎☟︎☼︎⚐︎🕆︎☝︎☟︎ ❄︎☟︎☜︎ 💧︎☟︎✌︎👎︎⚐︎🕈︎💧︎ ❄︎☟︎✋︎💧︎ ☠︎☜︎✠︎❄︎ ☜︎✠︎🏱︎☜︎☼︎✌︎💣︎☜︎☠︎❄︎ 💧︎☜︎☜︎💣︎💧︎ ✞︎☜︎☼︎📪︎✞︎☜︎☼︎ ✋︎☠︎❄︎☜︎☼︎☜︎💧︎❄︎✋︎☠︎☝︎ 🕈︎☟︎✌︎❄︎ 👎︎⚐︎ ✡︎⚐︎🕆︎ ❄︎🕈︎⚐︎ ❄︎☟︎✋︎☠︎😐︎✍︎

Genuinely only posting this to see if a very old roleplay is on here.

so this is an old story i did when I was bored like year ago? found it in my docs and started to fix it up some, hope you like this as filler in between working on my other book lol oh yeah also its a soulmate au because their good and i like them a lot Cover art by me

Once Upon a Time 8 children have fallen from the Surface world. 7 children were killed by Asgore, 1 killed themselves. 6 souls are Trapped in the Asgore's Castle, 2 are trapped in the Ruins. 1 will save them all. Clara. The 9th Human [ Book 1 of the Calamity Saga]

i made this a while ago dont judge ;-;

Chara and Asriel Meet Rave and Ronan At Beacon Academy!, Will They get along? Will Chara HATE Humanity Forever? Come read and See! {Glitchtale goes to their respective owners/owner} The Story I made for this book is mine and Some of the art is mine though

Stories of heroes past whispered upon ancient pages Told by the Prince of Darkness himself, Ralsei A story wrote entirely by requests from my readers Also just a way for me to communicate with you guys :P

A human child born to a broken world with a rare and legendary trait. With their family standing, can they fix what has begun? Can they recreate the world to a better place for living and the non-living? Note:the included ships that you may see are Alphyne and Asgoriel. Sorry for the other fans who like other ships. I may have wrong grammars in the story, so please be aware of that and just call me to change it. This story has been inspired by Ninnymouse42 "Undercorrupt" and Tomorrowland. Check these two out! You'll like it. Also I do not own the cover and the game.