Flash Crossovers
Filters
2K | « Prev Page 1 2 3 4 5 12 .. Last Next »

Riding the Lightning! by Elyred3516 reviews
(NOT FOR WEST-ALLEN FANS) A series of our very own Scarlet Speedster going on a sexual hazardous rampage with countless woman across the multiverse (Barry multi)
Crossover - Flash & Supergirl - Rated: M - English - Romance/Humor - Chapters: 4 - Words: 24,918 - Reviews: 22 - Favs: 26 - Follows: 20 - Updated: 8/30 - Published: 1/28 - [Barry A./The Flash, Kara D./Supergirl, Lena L.]
What is worse than human? by Bl4ckHunter reviews
One-shot story. Crack fic. When Stefan shuts his humanity off as he gives into Caroline's terms in 6x15, coincidentally, Iris West goes into Mystic Falls to get a scoop on the mysterious things going on here. Not for fans of Iris West.
Crossover - Flash & Vampire Diaries - Rated: T - English - Humor - Chapters: 1 - Words: 1,222 - Reviews: 2 - Favs: 3 - Follows: 1 - Published: 8/28 - Complete
Marvels The Flash (Avengers 1) by G4dgetJunior reviews
What If A Certain Speedster Existed In the MCU? Could Certain Events Change? What Would Happen Differently? Eventual Barry X Natasha, Steve X Kara. Reviews Are Welcome.
Crossover - Flash & Avengers - Rated: T - English - Hurt/Comfort/Sci-Fi - Chapters: 5 - Words: 4,579 - Reviews: 8 - Favs: 26 - Follows: 31 - Updated: 8/28 - Published: 4/24 - Barry A./The Flash, Cisco R., Captain America/Steve R., Erik S.
The Hitchhiker's Guide to the Millma Verse by Captain Sigma- Karry Co-Master reviews
With so many worlds in the multiverse, Hitchhiking Kayla enlists Mutant Cisco to explore, finding potential friends and enemies along the way. Continuing story. Part of the Millma Verse.
Crossover - Flash & Supergirl - Rated: K - English - Adventure/Sci-Fi - Chapters: 19 - Words: 111,167 - Reviews: 88 - Favs: 25 - Follows: 18 - Updated: 8/28 - Published: 11/26/2019 - Barry A./The Flash, Cisco R., Kara D./Supergirl
Anniversary Threesome by changingdestiny40
For their sixth anniversary, Patty presents Barry with the opportunity to enjoy a heated threesome with herself and a certain sexy and redhead female Avenger and close friend of theirs, providing the 3 of them with an evening of passion they'll never forget.
Crossover - Flash & Avengers - Rated: M - English - Romance/Friendship - Chapters: 1 - Words: 2,501 - Favs: 4 - Follows: 4 - Published: 8/27 - [Barry A./The Flash, Patty S., Black Widow/Natasha R.] - Complete
Bounty by CharmedMilliE- Karry Master reviews
On a world where the multiverse is well known criminals try to escape to another world to get away. Kara, Barry, and Rae (Barry's cousin) go after them to bring them back. Part of the Millma Verse
Crossover - Flash & Supergirl - Rated: T - English - Family/Adventure - Chapters: 14 - Words: 59,173 - Reviews: 78 - Favs: 22 - Follows: 16 - Updated: 8/21 - Published: 10/13/2020 - Barry A./The Flash, OC, Kara D./Supergirl
the PJ masks meet The Flash by Happy New Year 2022
The title says it all! (this crossover will be on hold)
Crossover - PJ Masks & Flash - Rated: K - English - Adventure - Chapters: 3 - Words: 2,805 - Published: 8/18 - Barry A./The Flash
BETTER ANGELS (KARRY SUPERFLASH) by KingMaster2526 reviews
¿alguna vez te han dicho que eres un ángel?- pregunto Barry dulcemente a lo que Kara nego juguetonamente- pues lo eres, Kara Danvers o Kara Zor-El. porque ese es tu nombre alienigena, porque eres una alienigena y creo que eso es genial- ambos rieron fuertemente mientras se perdían en la mirada del otro -y tu el mio, Barry Allen- respondió Kara con una dulce sonrisa SUPERFLASH
Crossover - Flash & Supergirl - Rated: T - Spanish - Romance/Family - Chapters: 12 - Words: 73,722 - Reviews: 6 - Favs: 8 - Follows: 8 - Updated: 8/15 - Published: 12/30/2021 - Barry A./The Flash, Cisco R., Kara D./Supergirl, Alex D.
A Summary of Pre-Finale Events by Cer1992 reviews
A summary of key events that occur after "Alternate Events 4: Multiversal Clashes" leading up to the Crisis finale of this series.
Crossover - Flash & Smallville - Rated: T - English - Adventure/Sci-Fi - Chapters: 2 - Words: 9,056 - Reviews: 7 - Favs: 4 - Follows: 8 - Updated: 8/12 - Published: 7/6 - Barry A./The Flash, Oliver Q./The Arrow, Clark K./Superman, Conner K./Superboy - Complete
Of Speedsters and Forces by Aragorn II Elessar reviews
A new enemy sends Barry, Wally, Jesse, Jay and Hunter into the Speed Force through which they discover new allies and worlds. Part 4 of the 'Heroes' series. Arrowverse/MCU/Smallville/DCEU/X-Men/LOTR crossover.
Crossover - X-Men: The Movie & Flash - Rated: T - English - Adventure/Sci-Fi - Chapters: 15 - Words: 45,211 - Reviews: 165 - Favs: 64 - Follows: 37 - Updated: 8/9 - Published: 2/29/2020 - Charles Xavier, Apocalypse/En Sabah N., Barry A./The Flash, Wally W. - Complete
Beautiful by CharmedMilliE- Karry Master reviews
On a world where most of our favorite characters are actors they balance their jobs, fans, conventions, their real lives including kids, and superhero life.
Crossover - Flash & Supergirl - Rated: T - English - Family - Chapters: 23 - Words: 135,542 - Reviews: 125 - Favs: 47 - Follows: 41 - Updated: 8/7 - Published: 8/25/2019 - [Barry A./The Flash, Kara D./Supergirl] [Dr. Caitlin S., OC]
The Xena & Gabriella Talk Show Arrowverse Interview by changingdestiny40 reviews
In light of the recent news regarding "The Flash" cancellation famed warriors, heroines, and part time talk show hosts Xena and Gabriella receive the opportunity to interview the majority of the Arrowverse's heroic leads regarding the cancellation of their franchise, what went wrong with it, and how the heroes feel regarding the years long journey they provided for its audiences.
Crossover - Xena: Warrior Princess & Flash - Rated: K+ - English - Chapters: 1 - Words: 5,747 - Reviews: 1 - Favs: 4 - Follows: 1 - Published: 8/6 - Gabrielle, Xena, Barry A./The Flash, Oliver Q./The Arrow - Complete
The Flash Annual by jason429
Peter Parker pays Barry Allen a quick visit on Central City as things ramp up on the road the Battleworld. One-Shot
Crossover - Spider-Man & Flash - Rated: M - English - Friendship/Hurt/Comfort - Chapters: 1 - Words: 719 - Favs: 2 - Follows: 1 - Published: 8/3 - Peter P./Spider-Man, Barry A./The Flash - Complete
Kara's sick day by Chuck B
Kara wakes up not feeling well and calls in sick to work she also calls her Super Friend Barry Allen who races to help her. This is just a nice little one-shot I did a while back.
Crossover - Flash & Supergirl - Rated: K+ - English - Friendship - Chapters: 1 - Words: 447 - Favs: 1 - Published: 7/31 - Barry A./The Flash, Kara D./Supergirl - Complete
The Flash reunites with Jake and his crew by Laquan2022 reviews
Jake, Izzy, and Cubby return to Central City to reunite with Barry Allen, Iris west, Cisco ramon, Caitlin snow, and Joe. But this time Jake and Izzy's future daughter Carol accidentally arrives to Central city. And secretly she's working with Captain Hook in the future. But the group doesn't know that yet. But they will though soon enough.
Crossover - Flash & Jake and the Never Land Pirates - Rated: K - English - Adventure - Chapters: 4 - Words: 2,243 - Reviews: 4 - Updated: 7/30 - Published: 11/5/2021
Flash Fiction by Toaofwriting reviews
Part II of the Lightning-Struck TARDIS series. A series of short pieces covering the plots, adventures, battles, and day-to-day lives of Barry's friends, allies, and enemies.
Crossover - Doctor Who & Flash - Rated: K+ - English - Adventure - Chapters: 5 - Words: 3,645 - Reviews: 3 - Favs: 4 - Follows: 7 - Updated: 7/24 - Published: 5/19 - Barry A./The Flash, Eobard T./Impostor Harrison W./Reverse-Flash
The Flash: into the Buffyverse by Stand with Ward and Queen reviews
When Barry runs into the singularity, he ends up in the Buffyverse universe at the end of Chosen. Barry must now come to grips with his new reality as he battles threats both supernatural and impossible.
Crossover - Buffy: The Vampire Slayer & Flash - Rated: T - English - Fantasy/Sci-Fi - Chapters: 9 - Words: 13,855 - Reviews: 49 - Favs: 65 - Follows: 67 - Updated: 7/20 - Published: 1/5/2021 - Buffy S., Faith L., Barry A./The Flash
Flashpoint Mayhem by TrueHorror88 reviews
Another victory for the team, yet someone was unable to celebrate that and chose to make a world-shaking decision. Barry saved his mother from death, changing his past and his present, but it also affected others without him knowing. Seth and his family are just as affected, maybe more. The team faces newer threats, but they're not new to the Lethal Protector. They're threats.
Crossover - Flash & Venom - Rated: M - English - Adventure/Romance - Chapters: 15 - Words: 458,243 - Reviews: 82 - Favs: 100 - Follows: 110 - Updated: 7/18 - Published: 4/18/2021 - [Dr. Caitlin S., OC] Killer Frost
Arrogance leads to downfall by Aragorn II Elessar reviews
The Illuminati try to fight an intruder in their Universe, but due to their arrogance, it does not go well for them. One-shot.
Crossover - Flash & Avengers - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 1,380 - Reviews: 13 - Favs: 30 - Follows: 14 - Published: 7/11 - Eobard T./Impostor Harrison W./Reverse-Flash - Complete
Possibilities by LycoX reviews
A series of one shots and ideas centered in the Arrowverse. (Requests Open Again)
Crossover - Flash & Arrow - Rated: T - English - Humor/Adventure - Chapters: 302 - Words: 369,709 - Reviews: 757 - Favs: 182 - Follows: 147 - Updated: 7/7 - Published: 3/5/2015
DONDE SEA, CUANDO SEA (THE FLASH X LEGENDS OF TOMORROW WHITEFLASH) by KingMaster2526
Historia ambientada en el 3x19 de The Flash -lo que sea por una hermana- -SCARLET CANARY / WHITEFLASH- AU
Crossover - Flash & Legends of Tomorrow - Rated: T - Spanish - Hurt/Comfort/Family - Chapters: 4 - Words: 18,780 - Favs: 2 - Follows: 2 - Updated: 7/3 - Published: 2/26 - Barry A./The Flash, Cisco R., Sara Lance/White Canary, Ray Palmer/Atom
There's A Car In The Living Room by changingdestiny40
Barry and Patty find their peaceful afternoon with friends at the West home rudely interrupted by a car barreling into the living room courtesy of Allegra due to a driving lesson with Chester gone wrong.
Crossover - Flash & Legends of Tomorrow - Rated: K+ - English - Humor/Friendship - Chapters: 1 - Words: 1,963 - Favs: 6 - Follows: 2 - Published: 6/26 - Barry A./The Flash, Allegra G. - Complete
Karry Universe by CharmedMilliE- Karry Master reviews
In an alternate universe both Barry and Kara exist together. This is what happens when they meet in college and fall in love. Follow them, their family, and friends through life from college years to being superheroes and beyond. This is Karry Universe. Leading the Millma Verse.
Crossover - Flash & Supergirl - Rated: T - English - Romance - Chapters: 185 - Words: 1,028,039 - Reviews: 3297 - Favs: 1,550 - Follows: 1,361 - Updated: 6/19 - Published: 3/4/2016 - [Barry A./The Flash, Kara D./Supergirl]
Heroes of SHIELD : Season 2 by What If Universe reviews
The Agents of SHIELD have returned to their "normal" everyday lives after they helped save the universe from the Batman Who Laughs and brought their homes back from the collision. But now they need to live with the fact they've become part of a bigger multiverse. But they can't worry about that now, considering their world is filled with problems of their own now.
Crossover - Flash & Agents of S.H.I.E.L.D. - Rated: T - English - Supernatural/Adventure - Chapters: 5 - Words: 10,300 - Reviews: 3 - Favs: 9 - Follows: 10 - Updated: 6/18 - Published: 9/8/2021 - [Barry A./The Flash, Skye/Daisy J.] Dr. Caitlin S., J. Simmons
Future Foundation (BRANCH of F&SM) by What If Universe reviews
Time is like a river; cause enough ripples and you could change the tide. What if the Flash was never born, in turn never creating the Reverse Flash? What if one simple change altered the universe forever? Welcome to a reality that shows one simple change can alter the course of everything. Follow us, as we journey farther into the unknown, and ponder the question: "What if…?"
Crossover - Flash & Fantastic Four - Rated: T - English - Humor/Parody - Chapters: 26 - Words: 73,920 - Reviews: 14 - Favs: 34 - Follows: 35 - Updated: 6/18 - Published: 9/3/2021 - Franklin R., Invisible Woman/Susan S., Spider-Man/Peter P., Valeria R.
2K | « Prev Page 1 2 3 4 5 12 .. Last Next »