Top 20 One-Shot Crossover Fanfics
Ranked by AO3 kudos. Each fic is tagged with crossover and falls in the short stories under 10,000 words range.
All Hallow's Eve - New York
by WhisperingDarkness
Harry Potter had never really managed a normal, peaceful Halloween, so he really shouldn't have been surprised when he was suddenly displaced from the grocery store and found himself in front of a maniacally cackling man in a very dramatic outfit.
No Difference
by The_Bookkeeper
Derek has been in a lot of bad situations. This one easily makes the top five. Or would, if Dean and Sam Winchester were actually acting like the sadistic psychopaths he expected them to be. Instead, Dean is referencing Star Trek, Sam is comforting Reid, and Derek has never been more confused.
The Other Father
by IzzyMRDB
So, Poseidon would admit he was lost.Odysseus had tricked him. Again. Despite the way the man had been all but trapped in Poseidon’s domain, Athena’s precious ‘Warrior of the Mind’ had not yet run out of luck and Poseidon was suffering for it. The coward refused to extend proper mercy, didn’t stand
The Dragon of Moria
by pristineungift
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 unt
Unforeseen Mayhem
by Aerugonian
It all happens so fast.One second Izuku's watching as Eri steps haltingly into the room, stomach dropping as he realizes she's going to go back to Overhaul and Togata isn't there to stop her. His body isn't cooperating with him anymore. It's all he can do to stand there and watch as she takes a step
To Dine so Dark
by jesso
Anne invites Eddie to a dinner with one of Dan's friends from work. It's not until he's halfway through the meal that he realizes what's in the food.This work is now available in Chinese
The Cyborg Arm Job
by copperbadge
The Leverage crew run into a new friend, find some buried treasure, and fight some Nazis. It's a pretty good day.
Mostly Void, Partially Stars
by Infinite_Monkeys
The Avengers' search for Loki takes them to a small desert town where the sun is hot, the moon is beautiful, and the single mother of an eight-legged horse can join the PTA.
Handler
by copperbadge
There are some staff changes going on at SHIELD.
By Any Other Name
by esama
There were many times John Watson came to Death's Door - only to be pulled back.
graduation day
by phollie
Two time-travelers meet at the in-between of two different worlds, but their purpose is forever the same - to make their precious person happy. [Kaworu and Homura form an unlikely friendship. Evangelion+Madoka crossover. Kawoshin, Madohomu. Mentions of self-harm.]
Come Home
by copperbadge
Jack finds a way to reverse Ianto's death; there is a cost, but the little family was happy, until their son James and his friend Steve went to war...
5 Times the Doctor Interfered in Darcy's Life and SHIELD Was Clueless, And The One Time That Everyone Found Out
by ITookTheOneLessTravelled
Multi-era Doctor Who, plays with the idea that Darcy was a companion (sort of). Slight spoilers for The Name of the Doctor. Rated for a bit of language and slightly mature themes.
Prodigal Son
by copperbadge
Bucky dies, but it doesn't take.
The Perils of Immortality
by helloearthlings
The Rift monitor is acting up again, but Jack knows exactly who's causing the disturbance.
White Hats
by shadydave
It’s a very comprehensive hat-based philosophy.
Spark
by haintblue
It’s 3 a.m. on a random Thursday when Stiles meets the witch.
Switched
by bestmelle
An ACOTAR/TOG Crossover in which Aelin and Feyre suddenly find themselves in the other’s court.
This Time, I’ll Stay
by Zumix_Xx
After defeating the White Star, Cale Henituse expected peace in his next life. Instead, he was reborn into the Fujioka family and somehow ended up attending Ouran Academy alongside rich weirdos, a chaotic Host Club. Cale is determined to live lazily and avoid trouble. Unfortunately, Kyoya seems oddl
The Ophidiophobia Job
by Glinda
Leverage/Stargate SG1 Crossover. Team Leverage discover that their mark has access to lots of highly classified alien technology. Eliot calls in some help from a 'buddy in the business' and it turns out he worked for the Stargate programme. Conspiracies are discovered, bombs are defused, aliens are
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About Crossover
Two or more separate canons collide: characters from different universes meet, team up, fight, or fall in love. Crossovers range from elegant fusions that merge settings into one world to gleeful collisions that drop one cast into another's plot.
Crossovers answer fandom's eternal 'who would win' and 'would they get along' debates on the page, and the friction between universes generates stories neither canon could hold alone.
Common scenarios: Detectives from two different procedurals jurisdictionally forced onto the same case, or a fusion sorting one show's cast into another universe's institutions.
About This List
This list of 20one-shot Crossover fanfics spans 96,218 total words. Kudos range from 295 on the newest entries to 22,953 on the most established. 55% are marked complete — check the status flag before committing to a longfic. The most common rating is Teen And Up Audiences (13 of 20 fics).
Recurring tags across this list: Crossover · Crack Treated Seriously · Crossover Pairings · Fluff and Crack · Alternate Universe - Canon Divergence.
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