21 - 40 of 93 Bookmarked Items in Alternate Universe - Undertale Fusion
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the second & third human. by Buttercup_ghost
Fandoms: Mahou Shoujo Madoka Magika | Puella Magi Madoka Magica, Undertale (Video Game)
25 Jul 2025
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Summary
*A pair of beautiful dolls. Keep together. Do not separate.
Series
- Part 2 of forwards, beckon, rebound (Undertale/Multifandom Crossover)
- Part 131 of crossover works
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Sealed Land of Forbidden Mysticism by akeetpotato
Fandom: Touhou Project, Undertale (Video Game)
30 Apr 2025
- Words:
- 287,924
- Works:
- 5
- Bookmarks:
- 4
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codependency twins ayano & kano meet codependency twins chara & asriel and do the spiderman pointing meme (with bonus time travelers feat. mary & frisk) | undertale/kagerou project crossover by Buttercup_ghost
Fandom: Kagerou Project, Mekakucity Actors, Undertale (Video Game)
14 Aug 2025
Summary
And yet neither of these siblings are actually twins.
- Words:
- 1,013
- Works:
- 1
- Bookmarks:
- 1
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forwards, beckon, rebound (Undertale/Multifandom Crossover) by Buttercup_ghost
Fandom: Dangan Ronpa Series, Mahou Shoujo Madoka Magika | Puella Magi Madoka Magica, Persona 5, Persona Series, Undertale (Video Game), 文豪ストレイドッグス | Bungou Stray Dogs
12 Nov 2025
Summary
Fusing multiple worlds into Undertale lol
Universe 1: Multiplayer
Universe 2: Asriel Survives- Words:
- 4,305
- Works:
- 5
- Bookmarks:
- 3
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suicide plans by Buttercup_ghost
Fandoms: Kagerou Project, Mekakucity Actors, Undertale (Video Game)
14 Aug 2025
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Summary
“So you also had a plan with your sibling to save your family?”
Ayano blinked red eyes at the young child in front of her. Their eyes were also red, scarlet painted over babydoll brown. The Daze, or the void as the kid was affectionately calling it, was split in half between them and her.
“I- yes, I suppose,” the kid, Chara, said. “But I doubt yours was like mine. I- kind of killed myself for mine.”
They blushed, contrite, as if this was a small mistake and not their life. Ayano laughed, decidedly nervous.
“Ah, you’d be surprised…”
Series
- Part 1 of codependency twins ayano & kano meet codependency twins chara & asriel and do the spiderman pointing meme (with bonus time travelers feat. mary & frisk) | undertale/kagerou project crossover
- Part 136 of crossover works
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there are eight humans. there are eight souls. by Buttercup_ghost
Fandoms: Undertale (Video Game), Mahou Shoujo Madoka Magika | Puella Magi Madoka Magica, 文豪ストレイドッグス | Bungou Stray Dogs, Dangan Ronpa Series, Persona 5
25 Jul 2025
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Summary
The First Human. Whether they be angel or demon, it depends on you.
The Second Human. Believed by the humans to bring salvation to the world, yet unable to fulfill that destiny as it would mean leaving her dearest friend.
The Third Human. She has the potential to become a Devil even more wicked than any.
The Fourth Human. Will she remain blind, or will her unbending back guide her to the correct answers?
The Fifth Human. An empty tool that does not know what it means to be human, much less monster.
The Sixth Human. A brightly burning soul of justice fed up with the hand dealt to him.
The Seventh Human. For how can you stand up for justice without being brave?
The Last Human. The one with the power to save or damn them all.
STAY DETERMINED.
Series
- Part 1 of forwards, beckon, rebound (Undertale/Multifandom Crossover)
- Part 106 of danganronpa crossover works
- Part 130 of crossover works
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Summary
(An AU were the cast of Murder Drones take that place of the Undertale Cast.)
After Uzi falls into the Underground, she must make her way through, learning more about herself along the way.
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Summary
There is a moment, when the Fellflower grins up at you with a mouth shining with too many teeth, where you allow your heart to crack. Allow the dangerous, hopeless thought to come close to the surface.
(we were so close)
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Bookmark Notes:
awwwwwwwwwwwwwwwwwwwwww
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Bookmark Notes:
i will cry (honorific). narrator aether guiding lumine thru the world,,,, sob
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Zine Pieces by starryroyalty
Fandom: Chainsaw Man (Anime), Chainsaw Man (Manga), Gravity Falls, Homestuck, Mouthwashing (Video Game), Over the Garden Wall (Cartoon & Comics), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia, 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), 呪術廻戦 | Jujutsu Kaisen (Anime), 呪術廻戦 | Jujutsu Kaisen (Manga)
10 Nov 2025
Summary
A collection of zine pieces I’ve had the honor to write!
- Words:
- 167,904
- Works:
- 48
- Bookmarks:
- 6
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Summary
The Underground was the perfect excuse to reinvent yourself.
To run away from your past.
But now it's only when you're standing on the surface that you realize that persona you made for yourself is about to crash and burn.And you're nowhere near ready.
Series
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17
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4
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speaking of our studied hesitation by Anonymous
Fandoms: Video Blogging RPF, Minecraft (Video Game)
07 May 2021
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Summary
Ranboo thought he was one of the few existing hybrids remaining, until he found himself in a cursed mountain, secretly a haven for his kind. However, things aren't as they seem on the surface, and Ranboo finds himself in a conspiracy that he didn't ask to be a part of. Needless to say, things get... complicated.
or, an undertale au because we all had an undertale phase
title from "glowing" by the oh hellos!
- Language:
- English
- Words:
- 13,512
- Chapters:
- 4/?
- Collections:
- 1
- Comments:
- 50
- Kudos:
- 190
- Bookmarks:
- 25
- Hits:
- 3,281
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Bookmark Notes:
Undertale(-esque) au
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The Frisk Chronicles AKA The Many Headcannons I Have For Frisk Dreemurr by G8BanterM8
Fandom: Earthbound: Halloween Hack, Undertale (Video Game)
09 Oct 2018
Summary
"There's no such thing as true hero"
Frisk knows that better than anybody.
The best heroes are those only an inch away from being a villian, the line between good and evil had always been blurry for Frisk and no matter how hard they try they know that deep down pacifism can only get them so far.
These are the stories of the Frisk's that understood that better than the others, the ones who died, fought, and eventually killed to get the happy ending they wanted.
These were the Frisks that did anything to achieve their goals.
Even if it meant becoming a monster.
Not that they minded.
It just meant they looked more like they did on the inside.
And for once they were perfectly okay with that.
- Words:
- 199,551
- Works:
- 3
- Bookmarks:
- 20
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Bookmark Notes:
reread on le list
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Summary
“I hate you,” the flower told him, once.
It was plainly stated. Like a simple statement of fact. It didn't even sound bitter, or resentful — just tired. He hummed back, just as unbothered, smiling still.
“I know,” he said. “I hate me, too.”
Series
- Part 2 of keep pretending to be one.
- Part 101 of danganronpa crossover works
- Part 122 of crossover works
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Summary
I want to tell you a story, I think. But the words are like shards in my throat.
Once upon a time, I could start, there was a girl that hated everything.
Once upon a time, I could continue, there was a boy who didn't.
But it didn't matter, did it? No matter how I told the story, the ending has already been written.
Series
- Part 1 of keep pretending to be one.
- Part 100 of danganronpa crossover works
- Part 121 of crossover works
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PotterTale by CryptidTyping
Fandoms: Harry Potter - J. K. Rowling, Undertale (Video Game)
21 Feb 2017
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Summary
While on the Horcrux hunt, Harry’s luck takes a turn when instead of going to Gringotts with Ron and Hermione, he is taken to Mt. Ebbot and meets a strange child in a striped shirt and together they fall down. How will Harry and Frisk make their way through the Underground?
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See you Later [ Never. ] ; TargetStrings by Crims0n_flow3r
Fandoms: Undertale (Video Game)
23 Aug 2024
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Summary
Error and Killer falls in love! Nightmare is opposed to it.
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Bookmark Notes:
See you Later [ Never. ] ; TargetStrings by Crims0n_flow3r
Summary:
Error and Killer falls in love! Nightmare is opposed to it.
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Was i a troubled kid?Yeah,you could say that.But i was a good one too and i think i also make a pretty good adult by Summerthecat
Fandoms: Percy Jackson and the Olympians & Related Fandoms - All Media Types
12 Feb 2024
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Summary
Percy,Percy,Percy,my first ever friend.I met you 10 years ago and you were the first protagonist i really related to and you're still the character i see myself in the most despite everything that's changed and you've gotten me through a lot.As a thank you,i offer this
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Summary
Adam is approaches the biggest challenge of his journey yet. Facing the King... but his nerves get better of him.
To help him, Lucifer decides to tell him a story of a long ago... the tragic tale of first fallen human and princess of Underground.
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how a star is born by Buttercup_ghost
Fandoms: Dangan Ronpa - All Media Types, Undertale (Video Game)
07 Jul 2021
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Summary
After Hajime stops coming to their meet ups, Chiaki visits Mount Ebbot in search of answers. She’s not sure what she’s looking for, specifically, but everyone has heard to the legends surrounding the place; Chiaki won’t be gone forever, but disappearing for a little sounds good. Just enough to mourn, even if she doesn’t know what exactly happened to her friend. And hey, maybe Hajime will be here! It’s a long shot, but Chiaki still has hope.
And then, high up on that mountain while lost in her thoughts, Chiaki Nanami trips.
(Meanwhile, Nagito Komaeda meets a strange woman with even stranger ideals.)
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“For a star to be born, there is one thing that must happen: a gaseous nebula must collapse.
So collapse.
Crumble.
This is not your destruction.This is your birth.”
—Zoe Skylar
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“Now that you’re here, what are you going to do? Can you really succeed, where we failed? It’s going to be tough. You’re going to cry, scream, struggle. You’re going to die, over and over again. Can you still do it?”
“No matter what, I’ll stay determined.”
“...Then I’ll believe in you, Chiaki Nanami. For now.”
Series
- Part 1 of what have you found to be unkillable?
- Part 66 of My DR3 rewrites
- Part 112 of crossover works
- Part 98 of danganronpa crossover works
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what have you found to be unkillable? by Buttercup_ghost
Fandom: Dangan Ronpa - All Media Types, Undertale (Video Game)
07 Jul 2021
Summary
“What part of yourself did you have to destroy
in order to survive in the world this year?
But most importantly:
what have you found to be unkillable?”
—Arabelle Sicardi-
Chiaki Nanami falls into a mountain, and the fate of the world—
s h i f t s .
- Words:
- 2,157
- Works:
- 1
- Bookmarks:
- 2