1 - 20 of 112 Works in Established Alphys/Undyne (Undertale)

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  1. Tags
    Summary

    Requests open!

    This is a collection of Reader-Insert Oneshots that are based off of either requests or prompts I’ve found.

    All requests are welcome as long as they are either Sans/Reader, Papyrus/Reader, or any combination of the skeleton boys and Reader.

    AUs of any kind are accepted! Though if I don't feel comfortable writing something I won't. No major character death or explicit non-con, please.

    Language:
    English
    Words:
    21,112
    Chapters:
    6/?
    Comments:
    11
    Kudos:
    51
    Bookmarks:
    6
    Hits:
    977
  2. Tags
    Summary

    DARK

    DARKER

    YET DARKER

    THE DARKNESS KEEPS GROWING

    ...

    You never believed in the supernatural, even after monsters escaped the Underground and magic was revealed to the world. But strange, inexplicable occurrences keep happening at your apartment, your dreams filled with visions of a peculiar grey door.

    Not to mention your weird neighbors and their shenanigans; A pair of skeleton brothers, a talking houseplant, and the quiet kid living with them.

    Perhaps that terrifying, short skeleton knows more than he lets on...

    [Update Schedule Here]

    Series
    Language:
    English
    Words:
    120,065
    Chapters:
    27/30
    Comments:
    474
    Kudos:
    397
    Bookmarks:
    67
    Hits:
    8184
  3. Tags
    Summary

    This is a fragment of a sequel to Askellie's Refuse.
    With her permission I'm giving this up for adoption to anyone willing to give it a try.

    Language:
    English
    Words:
    844
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    7
    Bookmarks:
    1
    Hits:
    46
  4. Tags
    Summary

    DIRECT SEQUEL/EPILOGUE TO “PATCHWORK SOUL” — 3 months later. A family of monsters and their little human kid try to start life anew beyond the confines of a giant mountain. Maybe they find something. Maybe they lose something. Time flows ever onwards, but sometimes it goes sideways, and it's heavier than they thought.

    [Please read PATCHWORK SOUL, know all major canon timelines, and the music of Undertale before reading for the best experience.]

    [An extended AU of what happens after a specific time kid's True Pacifist ending.]

    Series
    Language:
    English
    Words:
    465,797
    Chapters:
    46/?
    Comments:
    159
    Kudos:
    144
    Bookmarks:
    8
    Hits:
    3469
  5. Tags
    Summary

    Long ago, Humans and Monsters lived together in harmony… but one day, for reasons lost to time, war broke out amongst the two races. This is the journey of a child who will change the world forever; freeing the monsters beneath Mt. Ebbot and their journey to become the Symbol of Hope.
    This is the story of Izu Midoriya

    Language:
    English
    Words:
    13,391
    Chapters:
    8/?
    Comments:
    68
    Kudos:
    270
    Bookmarks:
    72
    Hits:
    3329
  6. Tags
    Summary

    Everyone has made it to the surface, filling each and everyone of them with happiness and astonishment.

    I mean, it was everyone's dream at one point.

    But this pacifist timeline wasn’t like the others; there was someone trying to destroy it for their own sick thrills.

    Though... we won’t allow that to happen.

    Rewritten version of Into You.

    Language:
    English
    Words:
    23,830
    Chapters:
    11/?
    Kudos:
    10
    Bookmarks:
    2
    Hits:
    391
  7. Tags
    Summary

    You reader, live in the horrortale universe five years after the monsters have surfaced. You enjoy a quiet life with your soulmate Sans and his brother Papyrus, or you did. Before Classic Sans decided to drag you and your boys across the multiverse! Lets see how this goes.

    Language:
    English
    Words:
    2,789
    Chapters:
    2/?
    Comments:
    5
    Kudos:
    73
    Bookmarks:
    12
    Hits:
    582
  8. Tags
    Summary

    They were all so happy. Laughing, joking, full of life, and hope.

    And you just... weren't.

    They didn't need you.

    No one did.

    Language:
    English
    Words:
    10,824
    Chapters:
    1/2
    Comments:
    18
    Kudos:
    79
    Bookmarks:
    6
    Hits:
    816
  9. Tags
    Summary

    Papyrus has been acting different, and Sans decides to talk to him about it.

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    This story entails a LOT of a paranoid, snappy Papyrus, and a worried but equally snappy Sans. Neither are perfect, but they're both trying to adjust to life on the surface, and it's a bit hard when Papyrus suddenly starts behaving oddly. He avoids his friends, especially Frisk, misses work (which he loved up until now), and much more to come. This is not going to be a very happy fic at first, but I promise there's a happy ending and some sweet moments sprinkled in-between for my own sanity.

    Language:
    English
    Words:
    2,880
    Chapters:
    3/?
    Comments:
    9
    Kudos:
    44
    Bookmarks:
    4
    Hits:
    377
  10. Tags
    Summary

    This is a collection of smut stories set in the Out of the Void AU. This is for those who wanted to see a bit more into the relationships of the major pairings in this AU. There's smut here but there's also fluff and plenty of serious discussions when it comes to relationships. I hope you'll enjoy it, you damn sinners.

    Language:
    English
    Words:
    10,720
    Chapters:
    4/4
    Comments:
    3
    Kudos:
    8
    Hits:
    341
  11. Tags
    Summary

    after many regretful resets, frisk has learned not to take their new monster family and life for granted, and now they have promised to never reset again...

    but not everyone believes that.

    what will happen?

    pls bear with me to find out

    oh yea also flowey's an asshat

     

    yes i suck at summaries))

    Language:
    English
    Words:
    1,401
    Chapters:
    1/?
    Kudos:
    21
    Hits:
    149
  12. Tags
    Summary

    ~You know, like the Notebook. But with less chick flick moments~

    (Y/n) is running out of time in this world. So, what does she do? The only logical thing. Complete her bucket list! Filled with Determination and a bit of Bravery, she does everything she can to finish it in time. Will she be able to? Of course! Especially with a very attractive skeleton helping her. But, will meeting him spark a new desire to live?

    Series
    Language:
    English
    Words:
    2,722
    Chapters:
    3/?
    Comments:
    6
    Kudos:
    23
    Bookmarks:
    3
    Hits:
    239
  13. Tags
    Summary

    □■□■□■□
    You were always a bit odd...

    That is, until you fall into the underground and meet a giant happy skeleton that seems to come right out of your dreams! It seems you two were made for eachother.
    But he hasnt been happy since his brother went missing, so many years ago.

    You accidently find his brother, now you must return to Papyrus before it's too late.
    This new world is twisted and evil.
    ■🕸■
    Good luck!

    (■This is written as ten scenes with one hundred words in each.■)
    (Ch.3 updated!)

    Language:
    English
    Words:
    5,313
    Chapters:
    4/?
    Comments:
    4
    Kudos:
    5
    Bookmarks:
    1
    Hits:
    152
  14. Tags
    Summary

    Life is good! Everything perfect for Alphys! A perfect home, a happy ending...

    Okay, so maybe the family Frisk made for them had...completely scattered to the four winds. But Alphys' life is perfect as long as she has Undyne. With her by her side, everything is manageable... until that security is undone by Undyne's hand, and she sends her away on "vacation".

    She decides to spend her "break" at a local Ski Resort, only to find that she has stumbled into Papyrus' workplace and accidentally breaks the three-year-long radio silence between them.

    It's only been three years, but he's aged.

    Series
    Language:
    English
    Words:
    7,874
    Chapters:
    2/?
    Comments:
    8
    Kudos:
    15
    Bookmarks:
    4
    Hits:
    154
  15. Tags
    Summary

    Frisk has failed the Underground, failed Underfell. A new child has fallen. The last child. With the last enterance sealed up, will the Monsters take Frisk message to heart, or will they take theirs?

    Series
    Language:
    English
    Words:
    6,521
    Chapters:
    1/1
    Hits:
    16
  16. Tags
    Summary

    Frisk has failed the Underground, failed Underfell. A new child has fallen. The last child. With the last enterance sealed up, will the Monsters take Frisk message to heart, or will they take theirs?

    Series
    Language:
    English
    Words:
    6,521
    Chapters:
    1/1
    Kudos:
    1
    Hits:
    6
  17. Tags
    Summary

    It's the age of Prohibition and Organized Crime.

    While many attempted to forget their worldly troubles with booze and drugs, the skeleton brothers were hard at work lifting Snowdin from poverty to profitability. Even if the means were less than legal at times and required a LV increase. They were nearing their biggest feat yet when you threw a wrench into their decade long plan.

    Overthrowing the tyrannical Don, or as he liked to call himself, "King" Asgore, would have to wait.

    Little did they know just how much of an effect that little wrench would cause besides the delay.

    How some 'entertainer' with an alcohol problem and an attitude to match could influence their world so much, was a wonder that puzzled even Gaster. But whether he had a plan or not, a storm of utter chaos was headed their way and everyone was going to be rocked by the waves you made.

    Language:
    English
    Words:
    12,886
    Chapters:
    4/?
    Comments:
    9
    Kudos:
    46
    Bookmarks:
    13
    Hits:
    485
  18. Tags
    Summary

    A story where you lose your home, have nothing left but a backpack of few belongings and some clothes sitting on a bench in an new unknown part of town and it's raining cats and dogs…… at lest you make a new friend?

    Language:
    English
    Words:
    5,214
    Chapters:
    2/2
    Kudos:
    16
    Bookmarks:
    3
    Hits:
    248
  19. Tags
    Summary

    Your name is Y/N, and you are a zombie. There was a zombie outbreak (thanks to Alphys' experiments going wrong,) 2 years ago, and you so happened to get bit a week ago. There was no cure, and so you had to spend your last moments with your friends, and your boyfriend Sans, before turning and losing all of your memories and emotions... Or so you thought.

    Language:
    English
    Words:
    293
    Chapters:
    1/1
    Comments:
    4
    Kudos:
    54
    Bookmarks:
    10
    Hits:
    547
  20. Tags
    Summary

    Now on the surface, and with increasing numbers daily, Alphys and Undyne now have to start looking towards their shared future with humans, one that they strive to make peaceful and happy. Along with the birth of their child, however, comes tensions, confusion, and fear. And as if that weren't enough, their child becomes more and more interesting as the years go by, offering them both a unique challenge along with the rest.

    Series
    Language:
    English
    Words:
    203,424
    Chapters:
    58/65
    Comments:
    280
    Kudos:
    127
    Bookmarks:
    9
    Hits:
    3114

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