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

A Rupture between Worlds Vol2 by SpeedyJesus354 reviews
Takes place after Vol.1 and 3x9 In the Flash. Regarding the aftermath of Flashpoint and defeating Zoom, Barry wounded back to the MCU after acidentally traveling there again. But, new problems and new faces show up leading to a war no one saw coming.
Crossover - Avengers & Flash - Rated: T - English - Humor/Sci-Fi - Chapters: 15 - Words: 48,842 - Reviews: 29 - Favs: 20 - Follows: 19 - Updated: 2/4 - Published: 11/24/2021 - Wanda M./Scarlet Witch, Captain America/Steve R., Barry A./The Flash, Cisco R.
Multiverse: Year One by The Batman II reviews
First installment in the Multiverse series. Heartbroken by everything that's happened because of Flashpoint, Barry leaves Earth One and finds a home on Earth 616, home to the Avengers. Barry will soon discover that his new home has great challenges for him. However, that won't stop Barry from fighting for what's right. Will The Scarlet Speedster be able to survive in his new home?
Crossover - Flash & Agents of S.H.I.E.L.D. - Rated: M - English - Sci-Fi/Adventure - Chapters: 26 - Words: 113,948 - Reviews: 112 - Favs: 75 - Follows: 71 - Updated: 2/4 - Published: 7/3/2021 - [Barry A./The Flash, Skye/Daisy J.] Savitar, P. Coulson - Complete
Flash Vs the MCU by Elyred3516 reviews
Barry Allen has turned evil and now it’s up to the Marvel Cinematic Universe to put a stop the guy who once was a hero!
Crossover - Flash & Avengers - Rated: T - English - Humor/Sci-Fi - Chapters: 1 - Words: 145 - Reviews: 4 - Favs: 2 - Follows: 1 - Published: 2/1 - Barry A./The Flash, Carol Danvers/Captain Marvel, Wanda M./Scarlet Witch, Thor - Complete
When the Scarlet Speedster met the Scarlet Witch by Elyred3516 reviews
Barry Allen has finally come undone. After Oliver dies rebooting the universe, Barry didn’t know what dangers led ahead, which is what led to Iris’s death. When he can’t recover, Barry leaves Earth-1 and goes on his own path. Along the way he meets new friends, new life, and a certain witch.
Crossover - Avengers & Flash - Rated: M - English - Adventure/Romance - Chapters: 3 - Words: 6,730 - Reviews: 6 - Favs: 13 - Follows: 14 - Updated: 1/31 - Published: 1/10 - [Wanda M./Scarlet Witch, Barry A./The Flash] Black Widow/Natasha R., Captain America/Steve R.
The Scarlet-Canary Collection by AllyBP reviews
A collection of short fics focused on Barry and Sara (because just like Elseworlds, I like to play with what ifs) All ratings
Crossover - Flash & Legends of Tomorrow - Rated: M - English - Romance/Humor - Chapters: 14 - Words: 37,820 - Reviews: 11 - Favs: 66 - Follows: 56 - Updated: 1/31 - Published: 10/27/2018 - Barry A./The Flash, Sara Lance/White Canary
The Second Oracle of Apollo by Elsa Phoenix reviews
Clarisse La Rue left her home in Ohio when she was ten, escorted by satyr Gleeson hedge, leaving behind her older brother, in Central City, who she loved above all else. The one who raised her. Years pass, both the Titan and Giant war have passed, and Clarisse hasn't spoken or heard from her brother since she came to Camp. Full Summary inside.
Crossover - Flash & Percy Jackson and the Olympians - Rated: T - English - Adventure/Family - Chapters: 13 - Words: 32,550 - Reviews: 3 - Favs: 9 - Follows: 15 - Updated: 1/30 - Published: 2/17/2021 - Leonard S./Captain Cold, Annabeth C., Clarisse R., Percy J.
Everyone loves the Flash! by Elyred3516 reviews
(NOT FOR WEST-ALLEN FANS)After a fierce battle with Thawne and Zoom, Barry is sent to S.T.A.R. Labs with shattered bones and a few injuries. When his friends from the MCU, Arrowverse, and DCEU come to check on him to make sure he’s okay, The Speedforce pays our Scarlet Speedster a visit and gives him a gift that no body could resist-not even Barry.
Crossover - Flash & Avengers - Rated: M - English - Romance/Humor - Chapters: 2 - Words: 3,771 - Reviews: 13 - Favs: 12 - Follows: 10 - Updated: 1/29 - Published: 1/28 - [Black Widow/Natasha R., Wanda M./Scarlet Witch, Barry A./The Flash] Iris W.
The Flash: Armageddon AU-Retribution & Comeuppance by changingdestiny40 reviews
Following the intense and chaotic events of "Armageddon", an infuriated Barry has finally had enough and takes extreme measures to finally and once put an for all an end to Thawne and his machinations. But not before delivering in no uncertain terms a strong message regarding his feelings towards his nemesis. With his fists!
Crossover - Flash & Arrow - Rated: T - English - Chapters: 1 - Words: 3,487 - Reviews: 3 - Favs: 6 - Follows: 4 - Published: 1/29 - Barry A./The Flash, Eobard T./Impostor Harrison W./Reverse-Flash, Oliver Q./Arrow/Green Arrow - Complete
protectors of central city by Snixxfrosty1
Rachel and her two best friends Brittany S Pierce and Barry Allen ( Sebastian) was struck by lightning causing them to go into a coma for 9 months. After the 9 months are passed Rachel and her friends soon find out they were granted superpowers. and long the way they meet someone from another world.
Crossover - Flash & Glee - Rated: K+ - English - Hurt/Comfort/Romance - Chapters: 4 - Words: 9,760 - Favs: 4 - Follows: 3 - Updated: 1/26 - Published: 12/10/2021 - [Killer Frost, Barry A./The Flash] [Rachel B., Santana L.]
Heroes Collide by UltraPhantom reviews
Barry, Oliver, Kara, and the rest of the heroes had just defeated the Dominator Invasion. They can finally rest...not. After the battle, the Dominators had one last trick that sent the Trinity into the MCU. They meet other heroes as they try their best to get them home. Along the way, the Trinity decided to help their world with their own threats. AMCU: 1
Crossover - Flash & Avengers - Rated: T - English - Adventure/Drama - Chapters: 3 - Words: 6,400 - Reviews: 21 - Favs: 28 - Follows: 36 - Updated: 1/21 - Published: 10/24/2021 - Barry A./The Flash, Oliver Q./The Arrow, Captain America/Steve R., Iron Man/Tony S.
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: 12 - Words: 344,351 - Reviews: 65 - Favs: 86 - Follows: 95 - Updated: 1/20 - Published: 4/18/2021 - [Dr. Caitlin S., OC] Killer Frost
SNOW-KEEN FAMILY(ARROWVERSE LESBIAN ROMANCE AND MDLG CROSSOVER FANFIC by Chloebuttocks10
Elizabeth Keen arrives to The Flash home town or city and met with Caitlin Snow after adopting their adult daughters what will happen next?
Crossover - Blacklist & Flash - Rated: M - English - Romance/Family - Chapters: 1 - Words: 1,105 - Published: 1/18 - E. Keen, Dr. Caitlin S., Felicity S.
SNOW-KEEN FAMILY(ARROWVERSE LESBIAN ROMANCE AND MDLG CROSSOVER FANFIC by Chloebuttocks10
Elizabeth Keen arrives to The Flash home town or city and met with Caitlin Snow after adopting their adult daughters what will happen next?
Crossover - Blacklist & Flash - Rated: M - English - Romance/Family - Chapters: 1 - Words: 1,105 - Published: 1/18 - E. Keen, Dr. Caitlin S., Felicity S.
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: 10 - Words: 40,204 - Reviews: 57 - Favs: 17 - Follows: 11 - Updated: 1/15 - Published: 10/13/2020 - Barry A./The Flash, OC, Kara D./Supergirl
Spider-Man: No Way Home by jason429 reviews
The final stop on the road to Battleworld begins here. Eobard Thawne warned Peter of his greatest challenge in Armageddon. Now? That challenge has arrived. It's gonna take Spider-Man and his Amazing Friends to band together for the most pivotal chapter on the Webslinger's story that will change Peter Parker forever. Based on the recent film of the same name, there's No Way Home.
Crossover - Spider-Man & Flash - Rated: M - English - Drama/Humor - Chapters: 14 - Words: 34,284 - Reviews: 28 - Favs: 17 - Follows: 16 - Updated: 1/11 - Published: 1/3 - [Peter P./Spider-Man, Michelle Jones/MJ] Barry A./The Flash, Mia Q./Blackstar - Complete
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: 4 - Words: 8,477 - Reviews: 2 - Favs: 6 - Follows: 8 - Updated: 1/10 - Published: 9/8/2021 - [Barry A./The Flash, Skye/Daisy J.] Dr. Caitlin S., J. Simmons
Justice League War Games by edmaster2
With a warning from Rip Hunter, the Justice League will have to get to the next level as more dangers start to rise: an unending nightmare spreads around the earth, Iron Heights Prison breakout, extermination machines, and much more and worse.
Crossover - Flash & Arrow - Rated: T - English - Adventure/Friendship - Chapters: 3 - Words: 7,497 - Favs: 2 - Follows: 2 - Updated: 1/8 - Published: 12/17/2021 - Barry A./The Flash, Kendra S./Hawkgirl, Carter H./Hawkman, Oliver Q./Arrow/Green Arrow
Alternate Events 4: A New Phase by Cer1992 reviews
The fourth installment of the "Alternate Events" series that begins one month after the heroes of the various universes defeated the enemy forces from Earth-X and Earth-64. It's only a matter of time before a new threat arises and not only brings everyone together once again, but leads to chaotic clashes across the Multiverse.
Crossover - Flash & Smallville - Rated: T - English - Adventure/Sci-Fi - Chapters: 10 - Words: 57,166 - Reviews: 65 - Favs: 18 - Follows: 20 - Updated: 1/5 - Published: 9/29/2021 - Barry A./The Flash, Clark K./Superman, Lex L., Conner K./Superboy
Stretching Your Wings by KitKatt0430
It's been... a while since Cisco last heard from Kendra. In fact, he thinks the last time he heard from her was right after she and Carter left the Legends. So he wasn't exactly expecting to get a call from her, asking for a favor. The favor being check in on Carter for her.
Crossover - Flash & Legends of Tomorrow - Rated: K+ - English - Friendship/Hurt/Comfort - Chapters: 1 - Words: 7,556 - Favs: 2 - Follows: 2 - Published: 1/3 - [Cisco R., Kamilla H.] Carter Hall/Khufu/Hawkman - Complete
Always Running by Kyle.Park reviews
Barry had been running from something his while life. So after waking up from a nine month coma Barry finds out he can run at the speed of light and becomes the flash. Though eventually his old teenage thoughts come back. With the help of the ccpd, Joe, Iris Oliver and team flash he may just make it through those thoughts again. He just has to find the courage to tell someone.
Crossover - Flash & Arrow - Rated: M - English - Hurt/Comfort/Angst - Chapters: 16 - Words: 29,322 - Reviews: 1 - Favs: 2 - Updated: 1/3 - Published: 2/14/2021 - Barry A./The Flash, Cisco R., Det. Joe W., Oliver Q./Arrow/Green Arrow
The Scarlet Spider by ParkerCooper reviews
After the Singularity that hit Central City, a mysterious Metahuman is trying to do good, but what will Barry Allen AKA The Flash and his team think of a new hero in their city? reviews are highly appreciated!
Crossover - Spider-Man & Flash - Rated: K+ - English - Suspense/Sci-Fi - Chapters: 13 - Words: 25,664 - Reviews: 7 - Favs: 39 - Follows: 52 - Updated: 1/1 - Published: 9/14/2021 - Peter P./Spider-Man, Gwen S., Barry A./The Flash, Det. Joe W.
Across Space and Time by KitKatt0430
Only one of them has even been born yet and, as the year ticks over from 2021 to 2022, Mia herself should only be about two years old. Not in her twenties. But here they are together, anyway. (Mia Queen/Nora West-Allen)
Crossover - Flash & Arrow - Rated: K+ - English - Romance - Chapters: 1 - Words: 1,036 - Favs: 1 - Follows: 1 - Published: 12/29/2021 - [Mia Q./Blackstar, Nora W.A./XS] - Complete
I'll be your soldier by Originalhybridlover reviews
Being in a relationship where the person who claimed to love was the same one who hurt you was no way to live but she didn't know how to get out. However, when Linda met Oliver Queen everything started to change for her. Falling in love with him was the easiest thing in the world. And just maybe he could be her salvation. [I suck at summaries] [ON-HIATUS]
Crossover - Flash & Arrow - Rated: M - English - Friendship/Romance - Chapters: 11 - Words: 33,081 - Reviews: 2 - Favs: 9 - Follows: 8 - Updated: 12/28/2021 - Published: 3/30/2018 - Linda P., Oliver Q./Arrow/Green Arrow
Futomomo by tooattached2fictionalcharacter
Len and Sara have ideas about what to do with Barry in the bedroom. I might continue if that's the kind of response I get.
Crossover - Flash & Legends of Tomorrow - Rated: T - English - Romance - Chapters: 1 - Words: 2,045 - Published: 12/24/2021 - Barry A./The Flash, Leonard S./Captain Cold, Sara Lance/White Canary - Complete
Revived arrow story by Pink ranger 13 reviews
What if Oliver Queen did get revived after crisis on infinite earths
Crossover - Arrow & Flash - Rated: K - English - Adventure/Family - Chapters: 2 - Words: 169 - Reviews: 1 - Favs: 4 - Follows: 4 - Updated: 12/20/2021 - Published: 1/20/2020 - Oliver Q./Arrow/Green Arrow, Sara L., Barry A./The Flash, OC
2K | « Prev Page 1 2 3 4 5 12 .. Last Next »