What if Izuku unknowingly possessed a "sentient" Quirk like Tokoyami's Dark Shadow? Enter Midoriya Izuku, a young boy thought to be Quirkless who subconsciously controls the number one vigilante in Japan; an entity powerful enough to rival even the strongest villains. There's only one small, tiny problem: the entity thinks of him as a big brother. Good luck, Izuku-nii-chan!

Intending to end the slaughter of his race, Sans finds a way to travel to a timeline in which his enemy would be vulnerable, in hopes to put an end to the wicked human. When his plan doesn't go quite as expected, Sans finds himself with a surprising new way to avenge what he has lost. (This fic is completed! Story and art by me, VickyViolet. AlsoIdrewcustomthumbnails,check'emout.)

Sans has watched as everything repeated over and over again. So has Frisk. Sans gave up a long time ago. Frisk, she still has plenty of determination. They couldn't end the loop on their own. But maybe, they could end it if they worked together? Female Frisk. Possible future Frisk/Sans.

16 year old Chara has a secret Admirer that knows them a lot more than they realize. male or female FC and Protagonist, you decide which. Patches Needed: (All Patches Complete) (2nd Plot Abandoned and up for adoption)

At night, Frisk feels a familiar presence. (Frisk x Chara) [Gender neutral Frisk and Chara]

Monsters are sometimes humanoid, but even so, very distinctly un-human. Skeletons, on the other hand, are very different creatures. Why is that? And why do they seem to be the only ones?

It's just another reset. There's no harm in switching things up a bit, right? After all, nothing really matters in the end. This time, it's Sans' turn to create his own ending, no matter the cost.

He fell, deep into the dark. Drumbeats echo. He moves forward, determined to save them. All the while, footsteps follow. A hand on his shoulder keeps him steady, he is never alone. [A 'retelling' story incorporating the 'narrator' theory].

With only four senses, Touch, Taste, Smell, and Hearing, Frisk must make it out of the underground without the most crucial sense for her survival, Sight. Blind!Frisk AU.

[Spoilers For Entire Game] "If we're really friends, you won't come back." After sparing the final boss and facing the consequences for their actions up 'til then, the fallen child takes those words to heart and resets. The next time will be better, but a question still lingers: what does it mean to be "friends"? If they keep going, maybe they'll learn the answer...

Frisk was living on the surface with their new family. Everything was perfect except, the dreams that seem to belong to someone else. Something is left undone. The past is pulling them back. The world is reset, everything is undone. Somehow, they have to break the cycle and save everyone, and themselves. (pacifist run spoilers)

Almost two weeks after the monsters returned to the surface, it is almost time for Sans' 18th birthday and Frisk and the others want to answer the one question that hasn't been answered; where did Sans and Papyrus come from? When Flowey and Chara finally get their powers back and the gang has to go into the depths of Timespace to stop them, they might finally get their answer.

A flowey-pot fic where Frisk refuses to leave Flowey behind, and attempts to show him the wonders of the surface. Can the human help their friend feel again?

Gaster has been ripped from the void after Alphys tries to bring him back, but he ended up in the overworld. He was confused and alone in this strange human world, until he meets an abused, agender teenager named Frisk. Together, they might be able to put an end to both of their problems and perhaps, even find a friend in each other. Cover image drawn by LuminousMoonRay!

Time is a capricious thing. Given enough of it, a child can become a demon. So, does it work the other way around? As the strange eons march by, can a demon cobble together humanity from scraps and spare parts? Or is it just a game to pass the time?

Frisk falls down into the Ruins, but when they try to speak to Flowey, he doesn't understand them. Now he's on a journey through the Underground with this kid, and sometimes they get this weird gleam in their eyes and it looks like they're talking to themself. He doesn't have time for this when there's a couple of human souls that need to be stolen.

Frisk opened their eyes. They sat up and their eyes landed on the golden flowers again. How many times had it been now...? A story on Frisk and Sans, both trapped in an unstoppable RESET loop and unaware of the inner demons each faces alone. As time passes and neither can escape the repetition of the days, the two must work together before they become enemies forever. Complete.

Good riddance, every obnoxious Monster is finally gone from the Underground. Now Flowey can have some state of peace being all by himself, wallowing in his defeat - wait. Why is that human coming back? Don't they have anything better to do? Welp, nothing can stop Frisk's DETERMINATION. Even if it has to take one step at a time.

*Genocide and Pacifist spoilers ahead* After leaving the underground in ruin, you resisted Chara's temptations. The question is, why is everything so different this time around?

You're exhausted. Every ending takes a little more out of you, but it just keeps restarting. Warning: contains violence and frequent mentions of suicide. Cover by eternal blossoms ( /u/3886989/ )

All of the monsters have been freed from the Underground. All except one. After six months, Frisk goes back down to the Underground to retrieve Flowey, though, upon trying to climb back to the Surface, the ladder falls, trapping both Frisk and Flowey in the Underground. Their only option of getting out is going the long way, to where the barrier fell. Though, a darker plan ensues.

A blizzard is about to hit Snowdin. Residents are taking shelter… Except for one lone skeleton.

Frisk reflects back on their power to RESET and the first time they met Chara. Frisk remembers all the times Chara caused them grief and sorrow, but also the times of happiness and understanding. How did Frisk turn the child who hated humanity into the child who hates humanity, if only, a little less? At least they like you, right?

After Frisk dies to save their friends, their life goes back to normal with no memory of what happened. But with these dreams, these monsters appearing, they realize that their life isn't so dull. With war about to break out against the monsters and humans, can Frisk find a way to save everybody again before it's too late? Or will a war break out between the species once again?

Frisk has done it! They've saved all their friends and finally made it to the surface! They've been chosen to be the monsters ambassador and is having fun living with their new family, but all is not well. Frisk fell down that hole on Mt. Ebott for a reason, what if that reason has been haunting them all through out their journey, what if that reason is back for more?

'Their soul is tired. There are only so many cycles they can go through before they just want to give up.' Another (unique?) take on Frisk's ability to Reset. Oneshot, set pre-game. Written for a challenge on the LJ writing community, WriterVerse.

An alternate ending to Undertale. To get this ending one would need to complete one Genocide run and a few pacifist runs before getting this phone call from Sans. Going as far back as the 1st human's descent into the underground, this story is very spoiler heavy and contains themes of suicide and some swearing and ideally, would be the way to save a timeline from a genocide run.

Being a foster parent isn't easy, Toriel learns. Especially when this foster child sees everyone they meet as a monster and claims to have an imaginary friend who tells them to do things. But hey, kids have active imaginations, right?

Reborn as a monster, Frisk has a lot to deal with: meeting their friends again, learning to control the magic they've been remade out of, and, until they manage all of that, living in the same space as Sans and Papyrus. It's strange and scary, but they're safe, and that's all they've ever wanted. (WILL NOT BE UPDATED HERE; BEING REWRITTEN.)

"...thought we agreed to not have any more bad times kiddo?"

Three times he's met this kid. Once he died, twice...well, he didn't. So that's something. (I meant to write a happy thing, I swear I did. But as it is...Main Character Death Ahead.)

Existence is a funny thing. Because, as long as you exist, no matter how unnoticeably, there's a chance you can help other people. There's a chance you can be seen. Featuring non-binary!Frisk and mute!Frisk.

If you try to spare Sans in the game, he kills you... But what if you kept Sparing him repeatedly? How would he react?

A series of loosely-related short stories and oneshots that spends time exploring Sans's and Frisk's life on the surface. Has a subtle overarching story that reveals itself bit by bit. Sometimes it's cutesy, and sometimes it's angsty. Takes place Post-Pacifist ending. Previous gen run implied. Kinda dark. Ratings range from K-T depending on the story. Enjoy!

Frisk heard whimpering coming from Sans room one night. Upon investigating, they realized that they stumbled upon Sans in the middle of a nightmare. And they were about to take the full blow of it. (Cover by aurabelmont on Deviantart)

Sans always watched the timelines reset. Because of a freak incident, the timeline was contaminated. A mysterious figure told him he had to go in and destroy the hate, but this timeline was more than contaminated. Everyone was dark, twisted. One by one, Sans must save the Underground, before the Underlord destroys him...but who is the Underlord? UnderFell AU

"If I have one piece of advice for you… DON'T… let his brother… don't let Sans find out ANYTHING about you. He'll…well… let's just say he's caused me more than my fair share of resets. Stay away from that guy." or, What if Sans and Asriel met long before? What then?

Things had been well in the underground. Frisk had broken the barrier, made the monsters friends, family. There was finally, at long last, peace. That was until they reset. Again, and again, and again. Sans is now determined to put a stop to it, once and for all.

He looks at me. Really looks at me. I stare back. My arm spasms and I fight to keep what little control I have. A familiar warmth begins to course through me...I never thought I'd feel it again. *Set during Sans' Genocide Fight*

"i dunno, the whole 'good frisk, evil chara' thing... it just seems... awfully convenient, you know? like, if there's one thing i know about frisk... it's that they're a perfectionist. and if there's one thing I know about chara... it's that they're a perfectionist. how do i know this isn't just some weird game to make me care?" Sans. Real friends don't murder each other. Complete!

Frisk has finally gotten the best result-breaking the barrier, and freeing the monsters. But, they've made mistakes along the way. Mistakes that can't be undone so easily. Post-pacifist ending dealing with the consequences of a genocide run. Focus on the family/friend relationships of Frisk and other characters. Mentions of abusive parents.

You can't regret hard choices for the rest of your life, right?

Sans decides he's going to take a break this timeline.

Frisk had finally done it. The barrier was destroyed. Everything had turned out alright, for a change. However, Frisk's adventure was far from over. There was one last thing Frisk needed to do before they left the Underground. They were filled with... Determination. (I'm terrible with summaries)

What if instead of the Frisk we know, there was an even younger one who became lost in the Underground? This time a five-year-old Frisk who is nothing but a scared child is the one destined to save the monsters and free them...she ends up changing quite a lot in this world. Besides, even if she's scared, she's DETERMINED to save everyone!

Frisk is just a normal teenage girl who doesn't like talking, likes to flirt, and may look a lot like a boy, but she somehow finds herself in the Underworld, a place full of monsters! She brings a certain flower around with her in hopes of at least surviving, but how is Flowey suppose to be a bad influence if the girl is lazy and very undetermined?

It was a lonely breaktime, when suddenly, a child appeared. One shot, based on Parent Teacher Conference animatic by Michelle Alvia kinda. Not really. I got inspired to do it form it! Hope I put the correct rating!

A girl falls into the ruins before frisk, but is mortally wounded in her fall and turns into a ghost monster, meeting Frisk on their journey and making bad puns with sans, what will she do with her new life? will she ever want to go home now? (mentions of suicide and depression) SansxOC

Hurting loveable and kind Frisk is one way to have a bad time. AU takes place in a world where Frisk, Asriel and Chara lives together with Toriel and Asgore in the outside world after Frisk revived the other two through some sketchy miracle involving determination and love.

Flowey is alone in the ruins. Frisk is determined to fix this. After all it's not a truly happy ending untill all the family is together, right? Pacifist Ending. T for swearing. After all, Flowey is in this.

The barrier has been broken, everyone is free, and it looks like a happy ending- until Frisk starts trying to use their friends as a knife sharpener. Faced with a malevolent force beyond his power to combat, Sans leads his friends on a desperate quest to find the one thing that might be able to stop the demon that comes when you call its name. (Post-genocide pacifist ending)

An AU in which the monsters were never imprisoned in the underground and Sans works as a Physics teacher at the school Frisk goes to. Little by little, he starts noticing that Frisk isn't exactly alright and that sometimes they show up to school with weird injuries that they just explain as "falling". On the other hand, the reader is a neighbour to Frisk and more than aware of thei