1 - 20 of 1,742 Works in Underswap Papyrus (Undertale)
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Summary
Wake up buried in snow, alone, and with no memories?
Check.
Kepp seeingg numbers, words, and text floating around every object and surface as far as the eye can see?
Also check.
Why does every person he meets say he needs help?!
His perfectly fine if you ask him."I wonder what determination taste like"
Note from the author:
This is my take on Fatal Error—a much more none canon, this isbt even OOC this is just straight up diffrent person with the same name, amnisiec version of him.
He’s also not fully canon-compliant in terms of power scaling and has and maybe different origin and personality.
It’s my reimagining of him.
Glitchy, lonely, and filled with questions, bad puns, power to blow up annoying people and some more puns. -
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Summary
Instead of another skeleton group coming out of the machine, it was you. A teenage girl. Now they have to figure out what went wrong and why this happened. In the meantime, they have their own puzzle and yours to solve in order to adjust to what seems like their new lives.
Or
A random teenage girl came in through the machine and now they have to deal with that and their own issues.
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You are a shapeshifter with the rare ability to turn into an orange fox—a secret you’ve kept hidden, knowing humanity once hunted your kind. Living near Ebott, you slip into the night to run free, though the fear of discovery always lingers. Meanwhile, Sans and Papyrus have unknowingly welcomed a manipulative woman named Kora into their lives.
Behind her sweet facade, Kora is a gold digger using the brothers for wealth, status, and comfort, willing to lie, fake affection, or even blackmail them if needed.Eventually Kora stumbles across your apartments terrible condition, deciding to become “friends” with you and inviting you to stay in the mansion with her and her apparent mates. It started off fine, until she began to spread lies— rumors.. Even blaming you for mistakes, stealing. And god who knows what else.
Maybe you can help these skeletons see past whatever game she’s playing at? (Anti-Harem, That’ll switch into a actual harem..)
As well as machine chaos.
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Oh: In which Blueberry learns earlier (through Error, in the Anti-Void) that his genetic material was used to build new beings: Nightmare and Dream.
He's in shock and overthinking until he concludes that, hey, he wants to meet them. He succeeds, not in the conventional way, but he does… Now, we'll accompany Blueberror on his journey out of the Anti-Void, to observe his practically children.
Series
- Part 2 of ❤️🩹💞 Caring for Babybones 💞🥰
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Story about what happened after getting to the Surface. Multiple alternative universes will be involved and I am only making this for fun, because I have been wanting to post this for while now.
- Language:
- English
- Words:
- 3,420
- Chapters:
- 1/2
- Hits:
- 1
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Summary
If the shadows had eyes and ears and hands to work with, would it worship the light or scorn it?
- Language:
- English
- Words:
- 5,235
- Chapters:
- 3/22
- Hits:
- 11
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Summary
Hi- uhm- Story with Blue joins the Bad Guys and FGoD Error In one- Bad Dream, Ink gets a redemption arc.
Das it.
Also, UnderFell, UnderSwap and Undertale Skeleton Brothers are all brothers, so no Red/Classic.
Also, gray Echo Flowers inspo is from the story For The Forgotten Ones. I forgot who wrote it T^T.... But It's a good story, go check them out!
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You were finally getting your life back on track. Juggling college courses and a new job, you were slowly but surely rebuilding from the ground up, convinced the worst was behind you. That all changes when a magical summons you can't refuse rips you from your world and drops you into a house filled with powerful, skeletal monsters who despise you before you’ve even said a word.
To them, you are the arrogant and careless human who shattered the soul of their dearest friend, the gentle mage Lyra. They see you not as a person, but as a living tool—a magical "key" they require to heal the damage you supposedly caused. Trapped in a multiversal nexus with no way home, you must navigate a gauntlet of relentless animosity and suspicion.
Every word you say is twisted, every action is judged through the lens of lies you don't even know have been told. How can you survive in a home that isn't a home, surrounded by enemies who believe they are the heroes? And how can you prove your innocence when the true manipulator is the very person they've sworn to protect?
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You've moved across country for a fresh start. (Running, you were running away.) Having a shit apartment with a high rent and needing a job, you go to your first interview and low and behold you run into a few monsters.
What happens when you meet a star eyed skeleton and feel something you've never felt with anyone else? How will meeting him change your life?
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Eight Skeletons Compete for My Attention and None of Them Pay Rent (And Neither does the Ghost) by Itsyaboisunnyd
Fandoms: Undertale (Video Game)
20 Sep 2025
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Living with skeleton monsters was supposed to be temporary. A law, a requirement, a way to smooth over integration. But secrets linger in the walls, a machine that hums at night, skeletons who call themselves cousins with stories that never line up, and a shadow you think you can only see. You keep telling yourself you could not see him. You tell your roommates nothing at all.
But lies don't last forever. -
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Blue and Razz are stuck inside a new Au, notably similar to their own. They both find each other and try to survive it together...while being hunted down by the Sans of the Au. Who they deemed as Violet/Indigo (They're the same colors right?) They avoid the Sans for as long as they can, but they can't do it forever. And to add the cherry on top, the Queen will deal with them sooner or later. And who would've thought that their absences in their Aus would cause such issues!!!
[There's actually no fics of these three and it's driven me bonkers!! They deserve love too!!]
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I STAND FOR THE SFR/FS FANS, I AM HERE TO SERVE AND DELIVER!! -
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It has been five years since the monsters emerged from the underground and with it humans that have turned into monsters. There is currently three skeleton invertos being held. A mother and her two children
Another inverto fic but with my little twist on it.
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My Fear, Nethermore [Underswap MEGALOVANIA] by blinkandyoullmissit
Fandoms: Undertale (Video Game)
18 Sep 2025
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Summary
Every indulgence comes with a cost.
The world of UNDERSWAP is a derivative one, a place where characters you're familiar with can live out new lives, do different things, but always retain that sense of identity and familiarity you're accustomed to, while not straying too far into newness.
We see for ourselves how this is not that uncommon a behavior, a world similar to this one has the main character be named Kris instead of Frisk. Submerging yourself in the opportunity of this, understanding the lengths to which you may cling onto it, is a fearsome thing.
What makes this world so special, is the question? What makes it worth doing, clinging onto this feeling?
A skeleton guides you through the underworld, and he chooses whether or not you may pass from one world to the next.
- Language:
- English
- Words:
- 7,123
- Chapters:
- 2/2
- Hits:
- 9
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A Pony's Tale by NumberOneNezuFan
Fandoms: Undertale (Video Game), My Little Pony Generation 4: Friendship Is Magic (Cartoon 2010)
16 Sep 2025
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*also disclaimer Ebott takes place in Canada, but I know jack shit about Canada so google is currently my best friend at the moment.*
Ayla suddenly woke up in a facility 7 years ago as a monster with no memory of where she came from. Then 5 years ago a women drops of a baby who is the same type of monster as Ayla. Now it's just her and that child. What will happen when somebody finally decides to take them in?
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Running through that forest you felt relived
No more fighting no more rings
No more experiments
No more cages
And most importantly your bitty where with you
Wait…are those…more skeletons!? -
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The Puzzle Honey Bandits are at it again!
Their reign of terror must end!
We all know they are monsters who only burgle other monsters.
What fiends they must be?
Who would dare?
They need to be brought down, by any means!
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The whiteness greeted you as you woke up again. It felt almost suffocating, especially when the only other people with you didn't exactly look or act normal. You just wanted them to emote, even a little bit.
All you wanted was to not be alone but no. You were reborn as Ink after you died in a lonely ditch. Now you have to navigate the vast Multiverse with your knoweledge of your last life. As you get friends and foes alike, you notice that not everything you know is trustworthy. Especially when you're a little lost skeleton with questionable ability to feel.
After all, anything could happen in a place this big.
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Starvation and desperation has run rampant in Underswap/Horrorswap Sans' AU for weeks. And with his friend and royal scientist, Undyne having nearly succumbed to malnutrition. It's up to Sans, the new interim royal scientist to solve the crisis before the returning king Asgore is ousted from power.
His weeks of research and isolation in the royal lab culminates in him believing he's developed a small yet extremity calorically dense food source in blueberries; grown in Determination (DT) and Perseverance (PV) enriched soil. With time running short and his own hunger beginning to set it. Sans makes himself the monster test dummy.
Good news; it looks to work
Bad news...just a few very juicy, very inflammatory, very mind altering, and VERY permanent side effects.Welcome to Berrytale
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Basically a classicshift fic, been starving for one so decided to write it myself. The whole thing was written at night so I beg you to not mind regressive quality of storytelling throughout it.
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Needing a connection between the two kingdoms to support their agreement of trades; arranged marriage comes into play with the princes being of marrying age and without a betrothed. Blue was the obvious first choice being that he was the younger of the two, but Stretch wouldn’t allow that and volunteered to be the one to be sent to the war-heavy foreign kingdom. Stretch was to be wedded to the commander of the kingdom's army, Edge. He was a warmonger and heavily scared from the multiple battles he fought. Rumors said that during wars Edge would go to the front lines because only a warrior like him could defeat the enemy single handedly and it was a waste of precious time to have his men fight for so long when he could easily do it. The thought of the beast of a man single handedly taking out another's army had Stretch shivering, what did he sign up for?