Gasterblaster Stories

In a world where heroes rise and darkness lurks, a unique girl named Sans finds herself thrust into the vibrant halls of U.A. Academy. With a mysterious past and the pow...

Mostly just pictures and some comics on Gaster Blaster Sans transforming or being a Blaster beast already. I do not own any artwork or au's shown in this book. Hope you...

YN Sans grew up wanting to be a hero. With the help of his best friends Frisk and Izuku, he aims to go to UA and accomplish that goal. Sans Male OC x Frisk

Dr. Gaster made 1-S and 2-P to break the barrier and start a war. When he disappeared, they were scared, confused, alone. They broke out of their prison and Grillby rais...

Sans and Papyrus' dad is the one and only Dr. WD Gaster. There mom is.. a werewolf?

Eccedentesiast Noun Someone who hides behind a fake smile, when all they want to do is hide and/or die. (Cover art is not mine, and full credit to the artist!! (I...

Everyone thought all the monsters were sealed Underground, but upon making it to the Surface, a couple monsters nobody has ever seen before starts to make an appearance.

(DISCONTINUED. GO TO THE ACTUAL AO3 WEBSITE TO READ OTHER CHAPTERS) https://archiveofourown.org/works/5350673 It's over. Frisk's journey has ended in the best way possi...

W.D. Gaster never meant to fall in love during the war. But he did. It resulted in heartbreak, a pup, and a high LV. So he experimented. 10 years and no more kid. So he...

What is wrong with Sans, and who is Gaster? This is such a reused Description. Undertale belongs to Toby Fox.

⚠️Read first chapter for rules when requesting!⚠️ (requests will NOT be open again in the future) -*_This book is discontinued (Please don't read it, it's so bad.) _*- •...

Ink had a.. how do you word it? 'Odd' ? That's a good word, he had an odd dream. After waking up, since that day he's been having even more odd dreams. The Star Sans, In...

Fgod Error, his little sis(Pixel), Null, and Void end up in vampireverse. Now this is pretty typical, the twist though, is that they are gaster blaster shifters! They ca...

Warning: this contains vore. If you don't like vore then please leave. Those who stayed, enjoy. Running through snow. "Help me!" " Fear" "It hur...

Y/N is an Ultima but she is also a soul mix. A soul mix is when two soul types combine and become one being. She is a mix of CHAOS and CORRUPTION. The strongest soul typ...

Reincarnated in the BNHA universe with the powers of Glitchtale Gaster (By Camila Cuevas on YouTube, subscribe) and Nephilim Sans from the thought.

discontinued -not accepting requests- ummmm... not really fast updates... not just ships, more like character dynamics. kind've tells a story if you squint Cover art by...

An fgod Empireverse crossover.

After Frisk "fell" into the core, they became core!Frisk. While being stuck down there, Core!Frisk is determine to escape and after finding new friends inside...

It's seem sans has been reincarnated after died at frisk hand but there's different happening