1 - 20 of 15,231 Works in Frisk (Undertale)
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20XX, the peak of Mt. Ebott. Several monsters emerged from a massive, hidden network of caves known as the Underground. The first few glance at a world that could have been, Frisk thought, hoping their soul would not allow another do-over. They wanted this to be over, as much as any other creature would, were they to know what truly happened all this time, or better yet, all these times.
Frisk just had to go back. Talk with everyone one more time before their soul would fade, and as a result, this world too would meet its demise. A world darker than darkness, where nobody can be found. Unless..
This is my take on what happened such that the world of Undertale became the world of Deltarune.
- Language:
- English
- Words:
- 1,046
- Chapters:
- 1/?
- Hits:
- 0
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Nightmare had been so kind.
He'd said all the right things and done everything perfectly to gain Dream's trust.
When had the proposition turned from the possibility of trust to the promise of power?
Or: Dream gets an invitation to stay at Nightmare's castle...forever!
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The King of Spades really hates the Lightners. They completely abandoned all the other Darkners, they locked him away, and they turned his son against him. He hates them so much, he swears he'll kill them
Hate quickly fades away when confronted with relics of his past, and he has to ask himself, is killing all the Lightners truly what he wants?
In other words, Spade King is having a mental crisis, Kris is suffering, Ralsei is keeping secrets for their protection, Noelle is becoming stronger, Lancer is trying to connect with his dad, Queen is trying to make up for what she did to Spade King, the Soul and Spamton are being pieces of shit, Jevil is somehow becoming sane, and Asgore wants to bang Spade King
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- Part 5 of The Mamamango verse
- Part 4 of Mamamangoverse main fics
- Language:
- English
- Words:
- 855
- Chapters:
- 1/?
- Hits:
- 22
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- Language:
- English
- Words:
- 807
- Chapters:
- 1/?
- Hits:
- 3
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Summary
In which Clover falls underground more times than anyone really wants to count.
They only have to die one time, and the universe - and someone else - seems to be trying as hard as possible to make that happen.
...
Why are they so damn good at living?!(au premise - frisk and clover fall at swapped times. unfortunately for everyone, frisk lives.)
Series
- Part 1 of Fallswitch
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Three years ago, a brother left his sister to search a mountain that no human has ever returned from.
Three years later, the sister, desperate for answers, follows her brother's footsteps.
The two meet again, but the result is likely the most hectic two weeks of their lives. And one of them has already lived an eventful life.
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Parental Union by DemonicPrince23
Fandoms: The Owl House (Cartoon), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), Murder Drones (Web Series), Phineas and Ferb, Undertale (Video Game), Deltarune (Video Game), Five Nights at Freddy's, Harry Potter - J. K. Rowling, Bendy and the Ink Machine, Star Wars - All Media Types, Undertale Yellow (Video Game), & More - Fandom
28 Jun 2025
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To my sister, assuming she finds this: PLEASE DON'T KILL ME! I saw the ship listed in the list of ships and was intrigued. I'm sorry.
To anyone confused: She and I know what I'm talking about. If she doesn't... Well, I'll survive for sure, unless I do something dumb and show her it. If she does... Well, I'll need to pray.
Credit for the idea goes to a Discord friend of mine, Voltage, who isn't a fanfic writer, but came up with the idea.
Credit for each individual fandom goes to their creators. I am none of them.
Credit for the story itself, however, is mine.
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Asgore demands all Royal Guardsmen to take down ALL humans!
But uh, Frisk is pretty much the only one down here. Thankfully, Frisk has some pretty peak skeletal figures to help them out.
- Language:
- English
- Words:
- 0
- Chapters:
- 1/?
- Kudos:
- 3
- Hits:
- 19
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Sick To Death (Of Me Chasing You) by CrossoverAU
Fandoms: Undertale (Video Game), Alice by Heart - Sheik/Sater/Sater & Nelson
28 Jun 2025
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Raine was sick. Really sick.
The kind of sick where, despite not knowing what she had, she knew she didn't have long left.
Her best friend Sans knew that too.
Not wanting her to live her last moments trapped in her house, Sans read her one of her favorite stories, Alice in Wonderland.
While chasing her through the pages, Sans learns that he loves her too much to let her die.
Will he be able to let her go or will he try to selfishly stop the clock?
Aka an Undertale/Alice By Heart crossover fic because I couldn't find one
Note: knowledge of Alice By Heart isn't needed to read this fic!
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Mezzo Soprano and the Barista by ReapingRose115
Fandoms: Skullgirls (Video Game), Undertale (Video Game)
28 Jun 2025
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Barista Frisk and Accountant Asriel decide to take a vacation and with a huge stroke of luck, good friend, regular customer and co-worker, Squigly had booked an expensive room that can fit two couples in the fanciest Hotel in New Meridian.
What hijinks could ensue from a Lunch Bet...?- Language:
- English
- Words:
- 7,059
- Chapters:
- 1/2
- Hits:
- 9
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A kid falls underground and they are DETERMINED to do the fastest pacifist speedrun ever, this of course becomes a problem for the narrator
- Language:
- English
- Words:
- 3,619
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 20
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Summary
Life in Hometown had always been quite; the small, sleepy, rural community had little to offer. For Ralsei Dremmurr, this feeling was compounded by a list of tragedies in his youth and years of being bullied. But when a spur-of-the-moment decision by his homeroom teacher throws Ralsei and Lancer, one of Ralsei's bullies, into another world, his life finally speeds up; for better or worse. Now expected to work with Lancer, Save the world, help several new friends with their problems, help his old friends with their problems, and more, Ralsei's got his work cut out for him.
A roleswap AU of Deltarune, where Ralsei/Kris trade places, Lancer/Susie trade places, Noelle/Berdly trade places, and many Darkners rotate around.Series
- Part 1 of Shattered Mirror
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This is the final part to the Kingdomtale pacifist series. I have a few other works I wanna post as well that are also kingdomtale related so keep an eye out for those. Also if you haven’t read parts 1 or 2, go read them! They’re gonna help explain how we got to this point in time.
Warning: may contain mentions of abuse, violence, death, dust, blood, depression, attempted suicide, cursing, romance, weird/Toby logic and ships. If any of these bother you then why are you still here? Otherwise, if you are fine with these things please enjoy reading this grand finale! This takes place after part 1, humanity’s creed, and part 2 of this series. Our protagonist Frisk is only referred to as a girl or she/her when it’s the humans talking due to the time setting and because of the morals discussed in humanity’s creed. Otherwise they are referred to as they/them (nonbinary pronouns. Or whatever other nicknames I mentioned in parts 1 and part 2). All oc’s are owned by me, other characters are owned by Toby Fox.
- Language:
- English
- Words:
- 6,258
- Chapters:
- 8/16
- Hits:
- 19
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Summary
Waking up buried in snow, alone, and with no memories but basic common sense?
Check.
Seeing numbers, words, and broken code floating around every object and surface?
Also check.
Looking like a walking system crash—with one eye red, the other computer-blue, and a body flickering like corrupted a light?
Triple check.He doesn’t know who he is.
He doesn’t know what happened.
And most importantly...
He doesn’t know why everything feels like he shouldn't be alive.Everywhere he looks, the world speaks in code—and he can read it like instinct. Names, stats, system files, broken timelines. And yet, the more he tries to remember, the more he feels like a mistake.
Note from the Me:
This is my take on Fatal Error—a much more none canon, wandering version of him. He’s not fully canon-compliant inn terms of power and has a different origin and personality. It’s a reimagining: glitchy, lonely, and filled with questions, bad puns, power and some more bad puns. -
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"Traumatized people chronically feel unsafe inside their bodies: the past is alive in the form of gnawing interior discomfort."
-The Body Keeps The Score, Bessel van der Kolk
Dr. W.D. Gaster is not a happy man...but he had been, once. Perhaps he could be again.
...and he can't stop thinking about you. Can't make himself stop thinking about you.
A story in which love, quite literally, saves the world.
(Now in Arc 2)
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"They’re sitting in a bed of golden flowers somewhere far beneath the earth, and, as far as they can tell, for better or for worse, they’re decidedly still alive."
_ _ _ _ _
Frisk climbs a mountain and inadvertently awakens an ancient terror sleeping beneath the flowerbed they land on when they fall. If by "ancient terror" one assumes the less-popular definition of "annoying narrator-ghost princet of monsterkind who is now, unfortunately, permanently stuck in their head."
Chara doesn't want to be awake. They especially don't want to be helpless in the back of a bloodthirsty human's head, watching them ruin the only home they've ever known with no power other than their voice to fight back with. Luckily for them, that's not what's happening at all. Unluckily for them, they may have to re-evaluate a few things about their worldview. Which, for someone as set in their ways as them, is not an easy thing to do.
(Then there's the matter of the weird flower, Frisk's unusual powers, and the Longest of Long Days the underground has ever seen.)Chara & Frisk no player AU true pacifist. Updates semiregularly from ~80 chapter backlog!
Series
- Part 1 of FUSEVERSE
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a crt without an audience is no better than a williams tube by Kaleidoscope_Soundwaves
Fandoms: Deltarune (Video Game), Undertale (Video Game)
28 Jun 2025
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Summary
Dumpster diving isn’t normally a past-time of yours, but after a fall like the one you just sustained, you find yourself hard-pressed to move on too quickly. Investigating the trash heap closest to you, you can see a mailbox, a stuffed animal, a soggy cardboard box, and an old gaming console. Wedged among these, a faint light glinting off its screen, is an old CRT TV.
You decide to get a closer look.
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Frisk, who had fall into the underground, made friends, survive impossible scenarios for a child, fought in battle, spare in battle and even went up against Queen of Monsters, Skeleton with Greatness, Captain of the Royal Guard, a famous Robot made to kill humans, KING of Monsters and soulless monster twice one being who had seven souls and the other was all souls of the said soul and monster kind making him a God of Hyperdeath yet despite all of this Frisk save underground freeing everyone and now leaving somewhere else after first tale is done another tale came a world of SKULLGIRLS
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Twin Runes by Thealmoghtbeyonder2099
Fandoms: Undertale (Video Game), Deltarune (Video Game)
28 Jun 2025
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Summary
Twin Runes es un AU cómico en su mayoritariamente alegre centrado en los universos Deltarune y Undertale. Una fuerza desconocida ha provocado que aparezca un punto de conexión entre los dos universos, lo que hace que Frisk y la molestia fantasmal Chara tropiecen en la vida de Kris en uno de sus muchos reinicios (para gran disgusto de Kris). Se produce un caos que rompe el juego.
La traducciones del "los pájaros y abejas" hasta el "No sirve pa' nada" no son mías. Del resto de traducciones si son de mi autoría
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Frisk never RESET — not at first. But something went wrong. One death, one fragment of a soul, and suddenly Flowey has the power to RESET the world himself. Now he’s trapped in an endless loop with a version of Frisk who remembers just a little more each time. And something is building. Experiment 27 might be the last. Or the beginning of something worse.
- Language:
- English
- Words:
- 596
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 12