1 - 20 of 90 Works in Undyne (Undertale) is a Good Friend
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Summary
Sans makes a HIGHLY inappropriate joke, and Papyrus is having none of it.
So, Papyrus heads over to Undyne for some comfort
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Snowdin Adventures with the Skeletwins by Just_AliAnne261
Fandoms: Undertale (Video Game)
16 Dec 2025
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"You want to know what to do here in Snowdin? Grillby's has food, and the library has information... If you're tired, you can take a nap at the inn. It's right next door - my sister owns it.
"And if you're bored, you can sit outside and watch those wacky skeletons do their thing. There's two of them... Brothers, I think. They just showed up one day and... asserted themselves. The town has gotten a lot more interesting since then."
The daily lives of wacky skeleton brothers Sans and Papyrus. Watch and read as they get into all sorts of wacky adventures, cause mayhem, and learn life lessons along the way!
Series
- Part 1 of Skeletwins
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Without History (maybe some things should stay forgotten) by Human_with_no_life
Fandoms: Undertale (Video Game)
15 Dec 2025
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After the barrier breaks, Monsters and Humans have learnt to live together on the surface, there is still many mysteries hidden in the underground. Most of them will stay forgotten or buried forever.
Until a ‘promise’ Sans made with Frisk leads to him telling a long and complicated story. His story, well not exactly 'his', but with as many questions as it answers, it seems to raise more. One thing is for sure; this tale will change everything.
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After the fall of the Barrier, life on the surface has begun to settle—but not all wounds heal with freedom. Frisk and the monsters navigate the quiet rhythms of a new world while remnants of the Underground’s past ripple beneath their feet. Between sleepless nights and strange seismic readings, old instincts stir, and a journey begins—one that may unearth more than just stone.
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Despite what he told the rest of the multiverse, what he had tried to tell himself, Error wasn’t nearly as against Soulmates as he pretended to be. You were perfect, his Star, only his. And he was finally ready to meet you.
Series
- Part 1 of Soulmate Au
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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."
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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. Completed!
Series
- Part 2 of FUSEVERSE
- Part 1 of aubades and nocturnes
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A FINE LINE BETWEEN ORANGE AND YELLOW - Hiatus/Rewriting by MairwynCSulien1990
Fandoms: Undertale (Video Game), Original Work
07 Nov 2025
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While Aneira didn't necessarily believe monsters existed, she did find the fact that everyone and their dog still did might mean something. Her childhood town of Beddgelert believed in monsters trapped under the mountains near their home that would need a seventh soul now to break out and destroy lands.
Putting this on hiatus because not only do I feel I can characterise Aneira better (writing characters in character is not easy for me), the general plot can do with reworking and yk foreshadowing. Might just reupload chapters once I've completed the story, which may actually get me to update something in a reasonable time frame.
Do not expect anything to be done soon because I am going to be very busy very soon and won't have the time until the Christmas holidays.
Sorry, not sorry, I want something I write not to weigh on my mind how badly written it was, less so than usual - this note is mainly for the singular friend that follows me and may actually read this.Series
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THE GREAT PAPYRUS PROBABLY DOESN'T NEED FOOD!
...probably being the keyword there.
But it's an experiment! A very scientific, very important experiment! And it has absolutely nothing to do with how disgusted food makes him feel!
Sans can't know about it. It's not that he doesn't trust him, no. It's just that Papyrus knows Sans wouldn't like the idea of his brother trying not to eat for a whole month.
or
Eating never came easy for Papyrus. The taste, the texture, the strange disgust that followed... none of it made sense. But when he hears skeletons might not need food at all, something inside him clicks.
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Existe uma história que todo mundo conhece, uma que não precisa ser repetida. Mas o antigo misturou-se com o novo, dando à luz uma obra composta pelo imutável e por aquilo que mudou. Oito humanos caíram. O primeiro foi perdido, assim como seu irmão. Mas último não era mais o mesmo. E um dos outros seis era um pecador. A história que todo mundo conhece ainda existe, mas mudada. Transformada. Não é mais a mesma história, mas, ao mesmo tempo, é. Medos antigos e memórias ruins transformaram-se em agressividade e raiva. Certezas e fé transformaram-se em dúvidas e receio. Uma jornada difícil transformou-se numa jornada ainda mais difícil... mas muito mais recompensadora.
E com tantas coisas iguais misturando com coisas transformadas, eu não consigo não me questionar: o que mais vai se transformar? E o que se tornará?
Series
- Part 1 of AnotherTale
- Language:
- Português brasileiro
- Words:
- 7,971
- Chapters:
- 3/?
- Hits:
- 7
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Summary
"I was – um, I was just being dramatic about it, you know?”
When Alphys pulled away a little to give her an embarrassed smile though Undyne just looked at her proudly.
“You mean you were being passionate! That is good, passion is one of your best qualities!”
Alphys stared at her in wonder a few seconds. It looked like it took all her courage to say: “I really want to kiss you right now.”
Undyne kept herself from leaning in. Pulling Alphys close, she asked, “What’s stopping you?”
Alphys is over the moon to finally get together with Undyne after some really high-stakes times in Hometown.
When her insecurities and doubts get in the way of having an honest happy relationship she doesn't know how to deal.
Series
- Part 13 of Kink/Whumptober 2025
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6 weeks after the barrier is broken, Alphys isn't speaking to anyone. Undyne starts to get very worried and tries to figure out how to help her and maybe finally get to kiss?
(True lab trauma)(before the beach scene) (beach scene will come later dw) -
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Hiiii guys 😗🥲 it's been so long ya'll oh my gosh 😭😭😭
"
Getting a job at an aquarium was not something Gustav ever thought he'd be getting into.
He went to college, he studied culinary, he was great. But, y'know. Shit happens. Plans fall through. And you take chances.
So! When he stepped foot into that private area, he assumed it was some rare fish- although, while technically yes they are rare fish. Eeeeeh, he doesn't think.... that really counts.
Mermen.
Jesus christ what fucking dream has refused to loosen its grip on him.
"
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Toriel teaches Papyrus and Undyne to cook properly, to varying results.
Toby mentioned his awesome fanfic idea on the Undertale 10th Anniversary stream, so I decided to cook something quickly. Enjoy!
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Everyone sees Undyne as loud, brash, unshakable.
Everyone sees Kris as quiet, distant, unreadable.But neither of them is just what the world expects.
When a soft piano melody in the hospital lobby meets the sound of a lime-fueled vending machine victory, two misunderstood souls find themselves sitting side by side—sharing music, honesty, and the kind of understanding that doesn’t need to be spoken aloud.
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When Alphys begins to cough up red spider lilies, she knows what it means. She's heard stories of it, even treated patients suffering from this exact thing. But she's the only doctor in the underground. How is she supposed to preform surgery on herself?
Alphys gets Hanahaki because I love the trope of characters getting fatally ill and hiding it
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There's been an epidemic of monsters suddenly falling unconscious, never to wake up. It's been labeled as falling down and the patients the fallen. As the Royal Scientist, Alphys has been put in charge of fixing things. But what is she supposed to do when her girlfriend's mom is among the fallen? Or when she makes things so much worse? How can she face Undyne or tell her what she's done? How will she fix this?
Might be a little out of character because I haven't played true pacifist in a while and I'm at the Sans fight so I don't want to reset to start true pacifist
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A Oneshot about Undyne moving in with Sans and Papyrus after she lost her house/job in a Queen Toriel ending.
Papyrus: SANS…WOULD YOU HAPPEN TO KNOW HOW I COULD HELP UNDYNE?
Sans: why don't you ask her?
Papyrus: I DID! SHE JUST SAID SHE DIDN'T KNOW… BUT I STILL WANT TO KNOW HOW TO BE A GOOD HOST!!
Sans: i think that's your first problem, bro. undynes not really a guest. we’re more like her roommates now.
Papyrus: “ROOMMATES”….SO… I TREAT HER LIKE I TREAT YOU??? UH THAT DOESN'T SOUND VERY-
Sans: -no, i mean like…well this is also her house now, yeah?
Papyrus: YEAH?
Sans: so you're a “guest” in her house as much as she’s a guest in yours. she’s got rules too.
Papyrus: …I DON'T REALLY GET IT
Series
- Part 2 of A Neutral Ending
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Having 1 HP isn't easy, as Sans can attest. Here's a bunch of instances where Sans gets hurt more than he should.
Series
- Part 2 of Not Skeletwins
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“Monsters are the surface finally! Papyrus got his car, Toriel got her dream school, Undyne and Alphys are planning to get married soon, Frisk couldn’t be happier with this ending.
But.. their sins still crawl on their back… they have to make it right and tell everyone what had led up to this happy ending… only for them to not be forgiven by one monster.”
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After taking the test to become a royal guard 46 times, Papyrus has given up. Now, his father has to get involved and see what on earth could make the Captain turn away his son, and historically Undyne has *not* been a fan of the scientist.