Top 20 Short Crossover Fanfics
Ranked by AO3 kudos. Each fic is tagged with crossover and falls in the 10,000–50,000 words range.
None So Blind
by prettybirdy979
They say when you assume you make an ass of you and me.Matt wishes that the Avenger's assumptions about his seeming inability to read the written word did something as benign as making an ass of him and them. Being called illiterate shouldn't hurt, not when he knows he's not, and it's not like he ca
Atlas
by etymologyplayground
"Eh! 'Little brother,' what!" Wei WuXian says, mock-outraged. "I'm thirty-five!" (Sort of. He was born thirty-five years ago, anyway.) "You must be, what, twenty-five tops?""Nooo," Xie Lian says, smiling. "I'm eight hundred years old.""You don't look a day over four hundred," Wei WuXian says. "Serio
Harry Potter and the Immortal's Playground
by May_May_0_0
It starts slowly, the steady disconnect between who he is and who he should be. The man in the mirror becomes a stranger to him; he looks into the glass and wonders how everything became so distorted and backward and...wrong. He notices in bursts: when Teddy grows taller than him, when he’s kissing
Mutantkind
by TheSovereigntyofReality
Logan is present in Siberia when the fight breaks out. He sees everything and has one thought. This dickhead needs his ass kicked.
you are a paradigm
by 1electricpirate
Sometimes, only sometimes, when Sherlock is very far away and absolutely guaranteed not to return for at least three hours, John sits on the sofa and lets the tea make itself. In which John is (reluctantly) a wizard, Mycroft is (apparently) omniscient, and Sherlock is (surprisingly) oblivious.
5 Times Venom Shocked the Avengers
by aanahitt
And one time Eddie did. After the life foundation incident, everything settled to normal for Eddie and his symbiote. Until the Avengers have to come pick them up because their cannibalistic habits are starting to freak the local cops. How do you adjust to living with heroes when your modus operandi
Alien Taskforce
by TheSovereigntyofReality
Just because S.H.I.E.L.D. and the Avengers didn't listen to Tony after the Battle of New York, it doesn't mean no one did.
Summer Job
by Sword93
Steven takes a summer break from his road trip at a little town called Gravity Falls.There he meets two kids who are in way over their heads.
Genius Billionaire
by TheSovereigntyofReality
After the Avengers Civil War, Natasha found another billionaire she believed would support the Avengers. It was the biggest mistake they ever made.
Finding Family and Home
by Slayer_of_Destiny
When Harry and the Doctor meet by accident, can they change the course of each others lives for the better? With Harry in his life how will the Doctor's changing relationship with Rory and Amy be different. And with the Doctor in his life how will Harry's life shape out differently from the expectat
A Lot of Red Leather and a Lot of Smoke
by greenleaf
Based on prompts here by doctor-derektionstein and clarkoholic.Derek Hale and Oliver Queen are best friends who work out together once a week at HAO Gym. Stiles Stilinski works the front desk and is convinced they’re together which sucks because he is totally attracted to Derek. Felicity Smoak comes
The Three Gods
by TheSovereigntyofReality
Following the Avengers Civil War, Stark Tower receives some visitors who are going to have an embarrassingly easy time of defeating Thanos. And putting the Rogues in their place.
Professor Elric?
by schrijverr
After The Promised Day Edward is sent on a miliary mission to Hogwarts where he will teach Alchemy to his students. He is told not to interfere with their business, but he has a hard time not getting involved with this weird Voldy prick.
A Shop Girl With A Broken Fob Watch
by LicieOIC
Following an emergency landing in the Dorset town of Broadchurch, the Doctor must hide his Time Lord self inside a fob watch to escape some vicious hunters, leaving Rose to look after his human self, Alec Hardy.
Gods and Monsters
by reaperlight
It was not his intention to bring an innocent into his war with L. But then he couldn’t in good conscience leave him there to be returned to the cupboard under the stairs. Ryuk chuckled and clapped him on the back. “Happy Father’s Day. I’m sure Misa will be thrilled.”
In the Light of My Love
by sn0w_quill
Shocked honey brown eyes stared down, seemingly frozen. Expressive grassy ones peered right back up, framed by some truly horrid glasses. Light Yagami considered himself a genius, nay, he was a genius. While he never saw the need to get his exact IQ, his perfect university entrance exam scores prove
Hero Classroom
by Wendy_Noire
When applying to high schools Karasuma told 3-E that the Department of Defense wanted them to apply to UA, so everyone did. Surprisingly for the dead end class of quirkless rejects, they all got into the classes they applied to.They have a head start compared to their classmates, at least a year of
Shadow's Ward
by KimpatsuNoHoseki
Harry didn't know where the Shadows came from, just that they were always there for him. However, a chance meeting with others who have Shadows of their own, leads to a better life for him.
Leon S. Kennedy is Dead
by GoblinCatKC
It's Leon's first day on the job. Dante's just waiting on the zombified pizza boy. An outbreak of mutations and zombies bring Dante and Leon together. Again. Seems they have a rather intimate history.
i was born (when they took my name)
by forthehonorr
“Woah,” Both he and Adora said in unison as they locked identical blue eyes. It was uncanny, like looking in a mirror. The young man had the same straw colored hair as hers, shaggy and shaved on the sides, but pulled back in a loose pony-tail. His nose had the same upturn as hers that Catra used t
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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 20short Crossover fanfics spans 470,929 total words. Kudos range from 301 on the newest entries to 31,364 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 (9 of 20 fics).
Recurring tags across this list: Crossover · Alternate Universe · Not Steve Friendly · Team Tony · Hurt/Comfort.
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