The Lost Brother. An Undertale Fanfic.
VengeanceMonsterKid
  • MGA BUMASA 664
  • Mga Boto 16
  • Mga Parte 4
  • Oras 9m
  • MGA BUMASA 664
  • Mga Boto 16
  • Mga Parte 4
  • Oras 9m
VengeanceMonsterKid
Ongoing, Unang na-publish Jan 13, 2016
actionadventurepapyrussansundertale
This book goes off of the theory that Sans and Papyrus were made by Gaster.

Onyx was one of three brothers created in a lab, his brothers were Sans and Papyrus, and their creator, Gaster. For a while life was good, that is, until Gaster had a certain idea one that would change Onyx's life forever but will it be for better or for worse? Read on to find out.

[DISCLAIMER]
I do not own anything used to make this book unless stated otherwise.
All Rights Reserved
actionadventurepapyrussansundertale
Table of contents

4 mga parte

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A Perfect World ni SpiritWolfNura
12 Parte Kumpleto
Image a world where there was no war. Toriel and Asgore never divorced. Gaster never fell into the void. The genocides never happened. Everyone is happy. That is this world. Gaster is a top scientist in the human government, helping improve the world. Alphys and Sans are his assistants. Asgore, mayor of Ebott and Toriel a teacher. Frisk, Chara, and Asriel their beloved, not dead or murderous kids. Undyne is the chief of police and Papyrus is her lieutenant. Everything is perfect..
Fall of the Empire [ Sans x Reader ] ni morrow-
23 Parte Kumpleto
You weren't quite sure what you were. As time progressed, you had been called many things. Hope, future, a new beginning. You weren't quite sure why they called you those things, for each passing day you say locked in a cell, waiting for the freedom that would never come. You weren't alone. You grew fond of two other experiments whom you nicknamed Sans and Papyrus. The routines seemed to grow normal, coma-induced trances, painful tests... And then nothing... One day, the pain stops coming. Slowly, the three of you venture outside of the prison and discover that there is a world beyond the cell.
Love Me Instead [Sans VS Gaster!Sans X Reader] (EDITING) ni PineappleGalore001
55 Parte Kumpleto
When a mishap in a reset happens and a character from another version is transported into the current world and timeline, what happens? Gaster!Sans, bad-skele-boy from EchoTale is confused to see that he had landed in a different, yet familiar world: Undertale! Apparently, in meeting with his 'original' version, they seem to be OK with one-another, UNTIL... (Thank you, @yourebluenow for the cover!) Book 2 Is here! it has the same name and cover, but with 'Part 2' in the title! https://www.wattpad.com/story/70011017-love-me-instead-sans-vs-gaster-sans-x-reader-part
Broken Timelines ✔️ ni Meepaa
106 Mga Parte Kumpleto Mature
I WROTE THIS WHEN I WAS 15/16 I'M REALLY SORRY LADS Chara is stuck in a spiral of Evil. Sans and Frisk are happily living on the Surface. The LOVE is gone, and replaced with love. All Gaster needs to do is interfere with a moment.
Reincarnated as Sans twin brother ni Sansdoll123
38 Parte Ongoing
The reader wakes up to a new life as a monster skeleton. In a new world, that's filled with monsters, humans, and magic. But instead of living their new life to the fullest, they will have to survive Gaster's experiments and war with humans. Just because Asgore became mad for absolute control over his citizens and the humans. Will the reader and his brothers find their freedom and a place to call home or die trying?
Gaster x Reader ni MoonReader109
61 Parte Kumpleto
Pretty self explanatory. This takes place after the Pacifist route in Undertale. Through determination, Frisk was able to bring back Chara, Asriel (Asriel is Flowey per say), and Gaster. I believe that Gaster is the father of Sans and Papyrus. I also don't believe that Chara is evil. The monsters are on the surface, and although they are amongst humans, most humans have accepted them.
Origin Of The Bros (Fontcest) ni BubblyShip
8 Parte Kumpleto
(Toby Fox owns UnderTale, the cover is my own art, and I'm trying out unusual ships and Fontcest is the next in line following Sansdyne. Why not?) Papyrus used to have trouble making friends, so his Dad decided to new addition to the family would be a great way to make Papyrus a perfect brother! Or, if things spiral out of control, a perfect boyfriend. Gaster really should have considered making Sans' personality not fit so perfectly with Papyrus' before he created him.
Love Me Instead [Sans VS Gaster!Sans X Reader] Part 2 (EDITING) ni PineappleGalore001
26 Mga Parte Kumpleto
Please read part 1 if you haven't! When a mishap in a reset happens and a character from another version is transported into the current world and timeline, what happens? Gaster!Sans, bad-skele-boy from EchoTale is confused to see that he had landed in a different, yet familiar world: Undertale! Apparently, in meeting with his 'original' version, they seem to be OK with one-another, UNTIL... (Thank you, @yourebluenow for the cover!) If you have not read part 1, look for it! It has the same name and cover, but without 'Part 2' on the title.
My Greatest Experiment (Skelebros' Origin Story) ni ZanaBSparrows
29 Mga Parte Kumpleto
After much research and theorizing, I've decided that I'm going to attempt it. It's risky, but I'm so desperate at this point that I'm willing to put my own well being on the line. If I survive, this may just turn out to be very... interesting. This is my thoughts on the origins of Sans and Papyrus, as well as their connection to Gaster. It will be connected to the ZanaTale timeline (or, in otherwords, my Sans x Reader fanfic "When Two Souls Meet"). Loosely inspired by the HandPlates AU by Zarla. Awesome cover image by Dweebycake.
The Original (An Undertale Fan Fiction) ni SkeleMatcha
13 Parte Kumpleto
Y/n is Sans and Papyrus' older sister. She has found a way back from the void and has to learn how to adjust to life back in the real world. She was the first to be created by W.D. Gaster, but a malfunction happened during her creation and she turned out to look more human than skeleton. Her only resemblance to a skeleton is her nose and her pale skin. Pictures do not belong to me.
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Slide 1 of 10
A Perfect World cover
Fall of the Empire [ Sans x Reader ] cover
Love Me Instead [Sans VS Gaster!Sans X Reader] (EDITING) cover
Broken Timelines ✔️ cover
Reincarnated as Sans twin brother cover
Gaster x Reader cover
Origin Of The Bros (Fontcest) cover
Love Me Instead [Sans VS Gaster!Sans X Reader] Part 2 (EDITING) cover
My Greatest Experiment (Skelebros' Origin Story) cover
The Original (An Undertale Fan Fiction) cover

A Perfect World

12 Parte Kumpleto

Image a world where there was no war. Toriel and Asgore never divorced. Gaster never fell into the void. The genocides never happened. Everyone is happy. That is this world. Gaster is a top scientist in the human government, helping improve the world. Alphys and Sans are his assistants. Asgore, mayor of Ebott and Toriel a teacher. Frisk, Chara, and Asriel their beloved, not dead or murderous kids. Undyne is the chief of police and Papyrus is her lieutenant. Everything is perfect..

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