Undyne Histoires

What if, Sonic's mother didn't leave him in the couples' home? What if, while escaping from the robots chasing them, she and Sonic fell into a mountain? What if, this ga...

Cover photo drawn by SodiePawp. Hello there! This is nman1983 and I am a male in his 30s that writes Undertale tickle stories, something of which I have been doing since...

It's been a six years since you and the Skeleton brothers moved into the Ruins, claiming one of the old houses in the city as your own. Astigma has another brother now...

Sans knew he wasn't like them... he was never one of their kind in the first place. Just an imposter. It was only time until his past came to bite him and they found o...

discontinued. Frisk and the group wake up to find themselves in a different dimension. They soon find out that this is a world with Quirks, and they have to fit in. Firs...

Someone who lost themselves and is trying to pick up the pieces and fix a life they don't remember having and trying to go through an entire underground system full of m...

A young girl, Y/N, has one of the rarest soul types- -empathy. She can feel when people are having a bad day which leads her into meeting two skeletons. While one quickl...

Oh no! The author of this book has fallen into undertale by accident. It looks like they will have to go through the game... dialog will be different, and things may hap...

You and your sibling, Frisk, have been living in a forest near the city for about four years now. Your daily routine has been unwavering since you moved here. Each day...

Monsters are trapped underground, and you just so happen to be an idiot and fall down. Enter Damion. A 12 year old boy who got lost in a storm and took the wrong turn. A...

The young skelebros escape from the core and head to Snowdin. Grillby finds them decides to take them in but finds out it may be much more difficult than he thought. Pap...

Ask Frisk and Company is a web series on youtube that was made 6 years ago now being put into a book with Y/N involved with the Undertale Crew's adventures and questions...

There had only ever been Sans and Papyrus, right? So when monsters make it to the surface, where did Cairo come from?

I made another Undertale AU. Monsters live under the mountain after the war. It seems peaceful, but the underground has gone through several disasters

The one that made it the furthest in the underground, perseverance. Perseverance had beaten almost all of the monsters in the underground from papyrus to sans and undyne...

First Draft The Player has taken over Frisk and is wreaking havoc Underground over and over and over. Sans has broken from the carnage and sacrificed himself to let Papy...

what if Asgore and Toriel part on good terms after his delcaration of war? what if Flowey did not turn evil by the time Frisk came into the underground ? what if Papyrus...

Gods can't die... Right? - Seeds of calamity have been sown for millennia. Although they've shown to stay dormant, eventually they will grow. As centuries pass, each and...

Nobody knows who the Riverperson is... nobody but a single Skeleton erased from space and time. So when he's pulled out of the Void, what secrets will be told? What is t...

This is an au of Gravity Falls and Undertale. At the start of their 2nd summer at the Mystery Shack, Mabel and Dipper fall into "The Bottomless Pit", also once...