crossovers that actually work

All too often, crossovers are poorly executed and/or clunkily fitted together. But every once in a while, they work. They really work. This is a collection of those crossovers.
(Open, Moderated)
Random works
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The Hitchhiker's Guide To The Apocalypse, Or How To Train Your Human by Devilbaby
Fandoms: The Umbrella Academy (TV), Hitchhiker's Guide to the Galaxy - Douglas Adams
09 Apr 2019
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Summary
On the subject of Number Five, The Hitchhikers Guide To The Galaxy says: "Highly successful instrument of chaos. If he smiles at you, run. Can be neutralized with coffee."
The one where Dolores is an alien.
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of things unknown (but longed for still) by aloneintherain for wayfiend
Fandoms: Marvel Cinematic Universe, Spider-Man - All Media Types, Spider-Man (Tom Holland Movies)
29 Apr 2020
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Summary
Peter Parker can’t walk around with the same daemon as Spider-Man. But she’s going to settle one day, and there’s nothing he can do about it.
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"Doesn't it creep you out, seeing a person without a daemon like that?"
"No. I think it would be creepier if the victim did still have a daemon, seeing as they're dead."
AU of Bones set in the His Dark Materials universe, where everyone has their soul made physical in the shape of a talking animal companion -- their daemon. -
A Captain With Seven Children...What's So Fearsome About That? by Rockinlibrarian
Fandoms: The Sound of Music - Rodgers/Hammerstein/Lindsay & Crouse, The Umbrella Academy (TV)
12 Mar 2023
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Summary
In Which Sir Reginald Hargreeves is still looking for a governess to handle his extraordinary brood, and thinks a convent would be a good place to find someone who truly understands discipline.
The Mother Superior may have slightly misunderstood his request, and instead sends him her novice most in NEED of discipline.
But perhaps Maria’s sense of harmony is what everyone needs most of all.
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Summary
When John Dorian turns up at Princeton-Plainsboro, House becomes interested in his case for all the wrong reasons.
Random bookmarks
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FIGHTERS OF THE GOOD FIGHT by AgnesClementine
Fandom: Supernatural, The Umbrella Academy (TV)
29 Oct 2020
Summary
One unexpected meeting creates a lifelong connection between two broken boys with hearts of gold.
- Words:
- 156,795
- Works:
- 15
- Bookmarks:
- 278
Bookmarked by mayfriend
15 Jun 2019
Bookmarker's Collections:
Bookmarker's Notes
“About, um– I wasn’t going to kiss you. At first.”
Oh.
Diego blinks, drums his fingers on his chest.
“What made you change your mind?” He asks, hesitant as he is because what if he doesn’t like the answer.
I got carried away. Payback. It was the heat of the moment thing. I thought it would be funny. I thought I’d like it but I don’t.
Dean shrugs jerkily, clears his throat, and starts peeling the label of his beer bottle. He mutters something that Diego doesn’t catch. Maybe he was too quiet or maybe Diego didn’t hear him from the sound of his heart beating in his ears.
“What?” He asks.
Dean clears his throat again, “I said I, uh, I saw you.”
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A Captain With Seven Children...What's So Fearsome About That? by Rockinlibrarian
Fandoms: The Sound of Music - Rodgers/Hammerstein/Lindsay & Crouse, The Umbrella Academy (TV)
12 Mar 2023
Tags
Summary
In Which Sir Reginald Hargreeves is still looking for a governess to handle his extraordinary brood, and thinks a convent would be a good place to find someone who truly understands discipline.
The Mother Superior may have slightly misunderstood his request, and instead sends him her novice most in NEED of discipline.
But perhaps Maria’s sense of harmony is what everyone needs most of all.
- Language:
- English
- Words:
- 14,754
- Chapters:
- 4/7
- Collections:
- 1
- Comments:
- 37
- Kudos:
- 77
- Bookmarks:
- 21
- Hits:
- 800
Bookmarked by mayfriend
03 Jul 2022
Bookmarker's Collections:
Bookmarker's Notes
“I’m Number Three, and I heard a Rumor that we don’t need a governess.”
An odd cloudiness seemed to pass through Maria’s brain, and she frowned at the row of children in confusion. They didn’t need a governess. But what was she doing here if they didn’t need a governess?
What they need, a small voice in the back of her mind pushed in, is a mother.
Sir Reginald’s voice cut through the fog. “Nice try, Number Three, but you’re getting her anyway.”
Well, they certainly needed someone, and she was already here.
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who else can take all your blood and your curses? by janie_tangerine for outboxed (fallencrest)
Fandoms: A Song of Ice and Fire - George R. R. Martin, Game of Thrones (TV), Wild Cards - George R. R. Martin
12 Aug 2014
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Summary
where the entirety of Westeros turns into mutants and it’s not good news for most of them.
Also, where Theon’s mission to Pyke is entirely changed by his own mutation and it means both bad and good consequences.
Series
- Part 1 of mutants in westeros
- Language:
- English
- Words:
- 15,328
- Chapters:
- 1/1
- Collections:
- 3
- Comments:
- 39
- Kudos:
- 547
- Bookmarks:
- 95
- Hits:
- 7,729
Bookmarked by mayfriend
01 Jun 2015
Bookmarker's Collections:
Bookmarker's Notes
Well, they say he said, looks like out of all the wild cards you could draw, you got off lightly.
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Fantastic Humanity by esama
Fandoms: Fantastic Beasts and Where to Find Them (Movies), Doctor Who
24 Jan 2017
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Summary
Somewhere in Newt's suitcase there is a pocket watch.
Bookmarked by mayfriend
12 Mar 2018
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Bookmarker's Notes
Four days after Newt had been expelled from Hogwarts, Mother and Father sit him down on the old living room couch and tell him the truth.
Two days after the welcoming feast on his first year at Hogwarts, Theseus pulls him aside in a empty corridor to tell him the truth.
On Mother's birthday when Newt is nine, uncle Will gets terribly drunk and breaks of in middle of tale about hippogriffs to tell him the truth.
Truth is, Newt never really forgot.
He still remembers sitting on the open road somewhere in Wales, weight of something big and heavy to four year old hands in his pocket and the wide open night sky above him. There were so many stars and he thought he knew their names.
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Shining Hero by Infinite_Twilights
Fandoms: 약한영웅 Class 1 | Weak Hero Class 1 (TV), 반짝이는 워터멜론 | Twinkling Watermelon (TV)
06 Oct 2025
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Summary
August 26.
The day Ha Yichan and Yoon Cheongah welcomed their second born. A day that had always been tried to fill with joy to cover the shadow of the loss of a third son that never got to grow up. Eungyeol would grow up wondering sometimes how his life would have turned out different if Ha Eunjae had been by his side. How much they would have in common, how different they would be from each other. That day was always a reminder of what could have been for him and his family.
That day also happens to be Park Humin’s birthday too.
a.k.a a different take in the twinkling watermelon x weak hero class crossover I’ve seen people want.
Bookmarked by mayfriend
24 Jun 2025
Bookmarker's Collections:
Bookmarker's Notes
“What if mom didn’t do it?” he reiterated, his father still unmoving “What if there’s something else we are missing? I think things are more complicated than–”
He didn’t flinch when the refrigerator door got slammed with force enough to shake it, he was used to it. His father turned around enraged, a level of anger that did send alarm bells on his head.
“What do you know, you brat?!” the man screamed “You think you know better because what? She was nice? She would do no such thing? Guess what, the world doesn’t work like that! You didn’t even know her like I did!”
Humin noticed how his eyes were starting to water a bit, but tried to ignore it.
“Dad, I didn’t ask you about this only because of that–”
“Then why exactly? You needed confirmation that you are not related to trash like me? Is that what you were hoping for?!” he kept yelling, but Humin still didn’t move. “You think I don’t see how you look at me, son?” he emphasized ironically “That I don’t notice how pathetic and useless you think I am? Or how all your friends glare at me when they come by? Huh?!”
“No, if you would just listen–”
“Well you got what you wished for! We should celebrate!” he exclaimed, laughing again while opening the full bottle, empty one on the other hand “We can stop pretending, right?”
Behind all that anger, Humin hated that he could see his father’s grief and despair as easily as he could breathe. He knew that this conversation would have probably ended up in an argument, but nothing like this.
“Dad…” he spoke carefully, almost as if the word was made of glass, and it seemed like it “I just wanted to stop feeling like this.” he admitted, his voice barely working as he did “I don’t think mom cheated, I found some things, and I think there’s more to it that we both don’t know, mom would never–”
He froze as the empty bottle flew across the room and crashed on his left shoulder.
Neither of them moved.
It wasn’t atypical of them to get into discussions, or sometimes even screaming like this, but it was the first time his father had done something close to hitting him before. He wouldn’t say he was the best, but he had never reached that low. Even with the pain he was feeling on both his shoulder and side of the face, he felt numb. It wasn’t the first or the last time he was hurt, but this felt different, crueler. Almost as if moving on his own, his hand carefully touched his cheek, feeling not only a few cuts but also the tears that were starting to fall, making them burn.
His father looked horrified.
“Humin…”
He didn’t bother answering, shake off the few glass shards on his shoulder, or grab anything other than his phone, jacket and shoes. For the first time in his life, he ran from a fight.