Best crossovers
This is a collection of awesome crossovers that do a great job of fitting two fandom universes together. Completed or regularly updated stories of 30,000 words or more preferred. No fandom fusions (The Avengers are all Hogwarts students, for example); characters and settings should remain themselves until they encounter people or places from another fandom. Please invite more stories to the collection!
(Open, Moderated)
Random works
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Harry Potter and the Key of Dagon by DonSample
Fandoms: Buffy the Vampire Slayer, Harry Potter - J. K. Rowling
05 Oct 2015
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Summary
A chance encounter in London leads Dawn Summers into a whole new world.
Series
- Part 1 of Key of Dagon
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The Right Technology by MarcusRowland
Fandoms: Buffy the Vampire Slayer, Wallace & Gromit
02 Jan 2007
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Summary
When Xander meets a stranger in a small British town, it's the start of a grand adventure...
Series
- Part 1 of West Wallaby Street
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Reaping the Whirlwind (The Boom Boom Boom Ba Remix) by liz_marcs for nothorse
Fandoms: Buffy the Vampire Slayer, Dead Like Me
01 Jan 2014
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Summary
What does the addition of supernatural-related reaps to the reaping workload, Roxy’s promotion, the addition of a new grim reaper with supernatural experience, a new sort-of boyfriend who may or may not be a pirate, and an approaching apocalypse all have in common? New grim reaper boss George doesn’t know, but she’s willing to bet that in the middle of it all the universe will kick her ass. Again.
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Summary
Through the spite of the spirits or plain rotten chance, a door that would have been better left untouched has opened. On the other hand, with Fire and Earth as one's allies, sometimes escaping is the easy part.
Even the Dragon-King's temple floods.
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The Dragon of Moria by pristineungift
Fandoms: Harry Potter - J. K. Rowling, The Lord of the Rings - All Media Types
12 May 2016
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Summary
After the Battle of Hogwarts, Harry Potter helped with the rebuilding and then went back to school, sitting his NEWTS and graduating with the rest of what The Daily Prophet called ‘The Disrupted Class.’ Following that, everyone expected him to become an auror. Harry himself expected it, right up until the moment came to apply to the academy.
He takes up a hobby instead, and it leads him to a whole new world.
Series
- Part 2 of Harry Potter AUs & Crossovers
Random bookmarks
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The Misunderstandings Series by DonSample
Fandom: Buffy the Vampire Slayer, Stargate Atlantis, Stargate SG-1
30 Sep 2015
- Words:
- 80,313
- Works:
- 5
- Bookmarks:
- 72
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Summary
Clark Kent finds himself in the Magic Box when Willow's memory spell goes haywire during "Tabula Rasa". Now an amnesiac Clark has to deal with a whole bunch of strange people, vampires, and superpowers.
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The Tale of Two by Spade_Storm
Fandoms: Iron Man (Movies), Marvel Cinematic Universe, H2O: Just Add Water
21 Jun 2021
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Summary
Rikki has traveled the world and lived her life to the fullest. While, the others have settled with their lives on land, Rikki remains unfulfilled.
She returns to Mako Island, the place of her rebirth, in the hope that Mako will give her another purpose. Her bond with Mako opens a door to a new world. A world filled with new rules and dangers.
And a man named Tony Stark.
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Adventures with Faith by DonSample
Fandom: Buffy the Vampire Slayer, Fargo (1996), The Hobbit - J. R. R. Tolkien
02 Oct 2015
- Words:
- 30,958
- Works:
- 4
- Bookmarks:
- 8
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Tags
Summary
Sarah Williams lives her life and retires to England, only to have another brush with magic when she witnesses three oddly dressed beings leave a baby on a doorstep. When her attempts to help the child come to naught, there is only one thing for Sarah to do: She must Wish the child away to the Goblin King. - How different may things be, when a child of prophecy becomes Fae.
Series
- Part 4 of Harry Potter AUs & Crossovers