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

Admin Assistance by T0rti reviews
Kara Danvers was not her cousin. She didn't don tights and soar through the skies. Nope. She kept her head down and worked in the shadow of a legend, taking care to stay far away from the wild and weird. That is until the wild and weird dragged her to it on its own. Waking up in the broken remains of a particle accelerator was not on her schedule this week.
Crossover - Flash & Supergirl - Rated: T - English - Adventure/Friendship - Chapters: 2 - Words: 7,103 - Reviews: 1 - Favs: 8 - Follows: 15 - Updated: 7/10 - Published: 7/3 - Barry A./The Flash, Iris W., Eobard T./Impostor Harrison W./Reverse-Flash, Kara D./Supergirl
Heroes Fathers Day Gathering by changingdestiny40 reviews
Following the previous Mothers Day surprise party, it's now the fathers on the receiving end of the surprise as their loved ones gather together to celebrate Fathers Day with them. Part 4 of [Heroes Multiversal Holiday Gatherings: 2022-2023]
Crossover - Flash & Avengers - Rated: K - English - Family/Friendship - Chapters: 1 - Words: 2,174 - Reviews: 2 - Favs: 5 - Follows: 2 - Published: 7/9 - Barry A./The Flash, Nora W.A./XS, Ant-Man/Scott Lang, Cassie L. - 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: 19 - Words: 87,777 - Reviews: 107 - Favs: 33 - Follows: 23 - Updated: 7/9 - Published: 10/13/2020 - Barry A./The Flash, OC, Kara D./Supergirl
The Reverse Flash Of Konoha by Gold3nWrld reviews
Naruto gains the connection of the Negative speed force on the day of his birth will that 1 percent of the Speed force help him control his anger or will he fall to darkness? Will he become something greater than his siblings and parents ever will be? How will he learn to control his speed? ON HIATUS WILL BE BACK AFTER THE OPE DF STORY
Crossover - Flash & Naruto - Rated: T - English - Chapters: 6 - Words: 19,304 - Reviews: 21 - Favs: 38 - Follows: 40 - Updated: 7/8 - Published: 6/10
Ode To Frost by changingdestiny40 reviews
Following her tragic yet heroic sacrifice, Frost finds herself in the Afterlife upon which she finds her welcoming committee consisting of both a truly legendary hero and another person dear to her and who has patiently awaited their reunion. Volume I.II of {MULTIVERSAL SAGA}
Crossover - Flash & Arrow - Rated: K+ - English - Supernatural/Family - Chapters: 2 - Words: 3,556 - Reviews: 3 - Favs: 14 - Follows: 7 - Updated: 7/5 - Published: 5/13/2022 - Killer Frost, Oliver Q./Arrow/Green Arrow - Complete
The Crimson Speedster by choejhulkp9 reviews
Barry Allen AKA the Flash wasn't the only one who was affected by the particle accelerator. He and Star Labs find another speedster who has similar powers to Barry, yet he's a bit different. Watch as the Scarlet Speedster joins the Crimson Speedster possibly join forces and protect Central City. Naruto x Linda x ?
Crossover - Flash & Naruto - Rated: M - English - Chapters: 17 - Words: 526,193 - Reviews: 745 - Favs: 1,925 - Follows: 1,946 - Updated: 6/30 - Published: 12/18/2015 - Linda P., Naruto U.
Lost Universe by CharmedMilliE- Karry Master reviews
When an accident happens Alura and Zor assume Kara is dead but years later they find out how wrong they were
Crossover - Flash & Supergirl - Rated: K+ - English - Family - Chapters: 3 - Words: 13,873 - Reviews: 23 - Favs: 28 - Follows: 29 - Updated: 6/25 - Published: 6/11 - [Barry A./The Flash, Kara D./Supergirl] [Alura, Zor-El]
Flash Forwards: The Lightning-Struck TARDIS Book II by Toaofwriting reviews
It has been a little over three years since Barry returned home after traveling through time and space with the Doctor. Unknown to him, though, his adventures are just beginning. For the Reverse-Flash has been waiting a long, long time to confront his oldest enemy, and his schemes will set all of Central City alight...unless Barry, Kara, and their friends can stop him. B
Crossover - Doctor Who & Flash - Rated: T - English - Adventure/Drama - Chapters: 2 - Words: 3,261 - Reviews: 1 - Favs: 4 - Follows: 6 - Updated: 6/14 - Published: 12/1/2022 - Barry A./The Flash, Eobard T./Impostor Harrison W./Reverse-Flash
The Alliance by ChaosTOAOAA
It was a Fated encounter. They, meeting each other was a Fated encounter. There meeting will go down in History. Two Heroes, Greatest of all time, will join hands to take down the foes to protect the Multiverse. Foes beyond the stars will think thrice to even lay their eye on them. Breaking the barriers of Space and Time to defeat the common enemies. For they are The Alliance.
Crossover - Flash & Avengers - Rated: M - English - Sci-Fi/Adventure - Chapters: 1 - Words: 1,479 - Favs: 3 - Follows: 7 - Published: 6/11 - Barry A./The Flash, Harrison Wells, Iron Man/Tony S., Jarvis
Star Wars: Balance by G4dgetJunior reviews
(Crossover AU) In an alternate universe, Anakin Skywalker was born female, and a man named Barry Allen is vader. What else is different? And what does this mean for the SW Timeline? Come find out in: Star Wars Balance.
Crossover - Star Wars & Flash - Rated: T - English - Sci-Fi/Fantasy - Chapters: 2 - Words: 2,874 - Reviews: 5 - Favs: 3 - Follows: 4 - Updated: 6/9 - Published: 5/12 - Anakin Skywalker, Barry A./The Flash, E. Palpatine, Gideon
Green Arrows Perfect Shot by William Joseph Geraghty WJG
Barry Allen
Crossover - Flash & Arrow - Rated: K - English - Adventure - Chapters: 1 - Words: 5,561 - Follows: 1 - Published: 6/6 - Barry A./The Flash, Eobard T./Impostor Harrison W./Reverse-Flash, Oliver Q./Arrow/Green Arrow
Heroes Mothers Day Gathering by changingdestiny40 reviews
Once more the heroes from across the multiverse and from different worlds gather together alongside their children and for the third time. This time to throw a Mothers Day party for the mothers and surrogate mothers among them. Part 3 of [Multiversal Holiday Gatherings: 2022-2023]
Crossover - Flash & Avengers - Rated: K - English - Family/Friendship - Chapters: 1 - Words: 2,064 - Reviews: 2 - Favs: 5 - Follows: 3 - Published: 6/4 - Patty S., Nora W.A./XS, Wasp/ Hope van Dyne, Cassie L. - Complete
Super Snowbarry by Zach-Morse-117 reviews
The Flash is the one to find Kara when she crash lands instead of Superman. Caitlin and Barry are together in this story because SnowBarry and Supercorp eventually. Disclaimer I do not own the rights to any Characters.
Crossover - Flash & Supergirl - Rated: T - English - Sci-Fi - Chapters: 12 - Words: 26,982 - Reviews: 25 - Favs: 64 - Follows: 61 - Updated: 6/2 - Published: 5/19/2021 - Barry A./The Flash, Dr. Caitlin S., Kara D./Supergirl, Alex D.
Ninja Sqaud by William Joseph Geraghty WJG
I have no summary
Crossover - Flash & Minecraft - Rated: K - English - Chapters: 1 - Words: 5,561 - Published: 6/2 - Barry A./The Flash, Eobard T./Impostor Harrison W./Reverse-Flash - 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: 7 - Words: 19,931 - Reviews: 3 - Favs: 11 - Follows: 13 - Updated: 5/31 - Published: 9/8/2021 - [Barry A./The Flash, Skye/Daisy J.] Dr. Caitlin S., J. Simmons - Complete
New Justice: Madness of the League by CharmedMilliE- Karry Master reviews
Summer 2022 and in Gotham the Gotham heroes are dealing with madness brought on by relatives of Batman. The rest of the league is enjoying a somewhat quiet summer though.
Crossover - Flash & Supergirl - Rated: T - English - Chapters: 6 - Words: 41,711 - Reviews: 27 - Favs: 14 - Follows: 7 - Updated: 5/20 - Published: 2/19 - OC, Kara D./Supergirl
The Flash: Learning to Live Again by Star Wars guy 123
After the fallout from the betrayal of his friends in dealing with Zoom, Team Flash is fractured. Barry decides it is best to head to Starling City to be with friends he trusts, but little does Oliver or Barry know what is in store for them
Crossover - Flash & Arrow - Rated: T - English - Hurt/Comfort/Romance - Chapters: 5 - Words: 7,454 - Favs: 17 - Follows: 17 - Updated: 5/20 - Published: 2/12 - [Barry A./The Flash, Thea Q.] Eobard T./Impostor Harrison W./Reverse-Flash, Malcolm M./Dark Archer
Secret Crisis: Battleworld by jason429 reviews
Battleworld is here. After the devastating loss of our heroes and the sacrifice of Peter Parker, our heroes must reassemble and band together to remind themselves who they truly are in the Darkest of times. Heroes.
Crossover - Flash & Avengers - Rated: M - English - Sci-Fi/Fantasy - Chapters: 32 - Words: 38,721 - Reviews: 13 - Favs: 10 - Follows: 8 - Updated: 5/18 - Published: 9/11/2022 - 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: 197 - Words: 1,111,552 - Reviews: 3421 - Favs: 1,645 - Follows: 1,435 - Updated: 5/14 - Published: 3/4/2016 - [Barry A./The Flash, Kara D./Supergirl]
The Fighting of Many Evils by ArrowverseFan833
The heroes have finally returned home from being shipwrecked, where they learned that they were destined to be heroes and were trained by Yeo Few, Slade Wilson, and Ra's Al Ghul. This is the sequel to "The Beginning of the Age of Heroes." *I do not own Arrow, Flash, or Supergirl. They belong to DC comics, Warner Bros., and the CW as well as their writers.*
Crossover - Flash & Arrow - Rated: T - English - Adventure/Friendship - Chapters: 19 - Words: 20,453 - Favs: 16 - Follows: 14 - Updated: 5/11 - Published: 9/12/2022 - [Oliver Q./Arrow/Green Arrow, Black Canary/Earth-1 D. Laurel Lance] Barry A./The Flash, Thea Q.
Fastest Alive by blackflashingfox1 reviews
I am the fastest alive. When I was a child, I saw mother killed by something impossible. Then an accident made me the impossible. To the outside world I'm an ordinary high school student but secretly, I use my speed to fight crime. And one day I'll find who killed my mother and get justice. I own nothing. M to be safe
Crossover - Flash & Quintessential Quintuplets/五等分の花嫁 - Rated: M - English - Crime/Adventure - Chapters: 2 - Words: 4,066 - Reviews: 1 - Favs: 5 - Follows: 5 - Updated: 5/10 - Published: 10/15/2022 - OC, Miku N.
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: 15 - Words: 48,526 - Reviews: 11 - Favs: 80 - Follows: 70 - Updated: 5/9 - Published: 10/27/2018 - Barry A./The Flash, Sara Lance/White Canary
Sorrow Souls by antisocialmike reviews
Based after the series finale of Arrow & if Thea said no to Roy's proposal & After the Flash defeats Eva. My take on some things. Can two of the most damaged people anybody could know, help each other heal & find peace within themselves as well as with the world? (Rated M Later)
Crossover - Flash & Arrow - Rated: T - English - Romance/Hurt/Comfort - Chapters: 10 - Words: 40,955 - Reviews: 13 - Favs: 22 - Follows: 27 - Updated: 4/30 - Published: 4/1/2022 - Barry A./The Flash, Dr. Caitlin S., John D./Spartan, Thea Q.
Need and Trust by Ronnie Jane
Barry may not be able to push everyone else away – But Oliver won't be one of those people.
Crossover - Flash & Arrow - Rated: T - English - Hurt/Comfort/Romance - Chapters: 1 - Words: 3,730 - Published: 4/24 - Barry A./The Flash, Oliver Q./Arrow/Green Arrow - Complete
Elem 4-Speedster's Trials by LORD NAVIGATOR reviews
Father and mother killed by a man in yellow with red lightning. At seven wonders around the village and gets caught by a storm, rushing home he finds a place where a window was open. About to enter, he is hit by a lightning bolt and falls into a chemical container, but quickly comes out by swimming back up. Develops powers and gets a team to stop crime in the world.
Crossover - Flash & Naruto - Rated: T - English - Family - Chapters: 6 - Words: 16,607 - Reviews: 7 - Favs: 41 - Follows: 44 - Updated: 4/20 - Published: 6/22/2018 - Eobard T./Impostor Harrison W./Reverse-Flash, Naruto U., Samui, C
2K | « Prev Page 1 2 3 4 5 12 .. Last Next »