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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: 80 - Favs: 98 - Follows: 108 - Updated: 21h - Published: 4/18/2021 - [Dr. Caitlin S., OC] Killer Frost
Scarlet Spider and Speedster (BRANCH of F&SM) by What If Universe reviews
What if instead of friends, Barry Allen and Peter Parker were brothers? But when Nora was murdered by Eobard Thawne, they were separated when Peter was only a baby. Peter was adopted by the Parker's, and Barry was adopted by Joe West when the Parker's left. As the years went on, Barry never gave up on finding Peter, but things change when he was on a trip and a spider bit him.
Crossover - Spider-Man & Flash - Rated: T - English - Parody/Drama - Chapters: 35 - Words: 103,252 - Reviews: 79 - Favs: 78 - Follows: 75 - Updated: 7/17 - Published: 1/27 - [Peter P./Spider-Man, Mary Jane W.] May P., Barry A./The Flash
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: 20 - Words: 120,615 - Reviews: 106 - Favs: 44 - Follows: 42 - Updated: 7/17 - Published: 8/25/2019 - [Barry A./The Flash, Kara D./Supergirl] [Dr. Caitlin S., OC]
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: 11 - Favs: 20 - Follows: 9 - Published: 7/11 - Eobard T./Impostor Harrison W./Reverse-Flash - Complete
The Next Generation : Book 4 of the Spiderverse by What If Universe reviews
It has been over a decade since Crisis. The Justice League on Earth-Prime have all moved on and have all started to raise their families in this crazy new world. But this world is showing to have many more challenges for the next generation. New villains rising from the ashes, and there are a few secrets within these families that will change everything they thought was once true.
Crossover - Marvel & Flash - Rated: T - English - Mystery/Adventure - Chapters: 41 - Words: 161,918 - Reviews: 50 - Favs: 27 - Follows: 26 - Updated: 7/9 - Published: 10/23/2021 - [P. Parker/Spider-Man, Dr. Caitlin S., Killer Frost] OC
Second Chances: Kid Flash by Lauriverfanboy1 reviews
My name is Wally West. For years I've traveled, trying to find my place in a world of heroes, trying to find peace. But after getting struck by lightning in a new world, I think I've finally found my place as I become the hero I was always meant to be. I am Kid Flash. Part 9 of Second Chances.
Crossover - Flash & Black Lightning - Rated: T - English - Chapters: 20 - Words: 19,949 - Reviews: 13 - Favs: 14 - Follows: 12 - Updated: 7/8 - Published: 1/6 - [Wally W., Linda P.] [Felicity S., Det. Eddie T.]
Earth 262 by breacher243 reviews
Formally a vigilante know as strike in Star City young Hunter Lance moves to Central City to live a normal life as a CSI when things take a unexpected turn/ DISCLAIMER: I DO NOT OWN THE FLASH OR ARROW JUST A FEW ORIGINAL CHARACTERS.
Crossover - Flash & Legends of Tomorrow - Rated: M - English - Sci-Fi/Hurt/Comfort - Chapters: 33 - Words: 68,577 - Reviews: 2 - Favs: 4 - Follows: 2 - Updated: 7/8 - Published: 1/6 - Dr. Caitlin S., Barry A./The Flash, Oliver Q./The Arrow, Sara Lance/White Canary
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
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: 1 - Words: 3,545 - Reviews: 3 - Favs: 3 - Follows: 9 - Published: 7/6 - Barry A./The Flash, Oliver Q./The Arrow, Clark K./Superman, Conner K./Superboy
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: 11 - Words: 61,236 - Reviews: 6 - Favs: 5 - Follows: 6 - Updated: 7/3 - Published: 12/30/2021 - Barry A./The Flash, Cisco R., Kara D./Supergirl, Alex D.
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
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: 4 - Words: 2,892 - Reviews: 2 - Favs: 4 - Follows: 6 - Updated: 6/27 - Published: 5/19 - Barry A./The Flash, Eobard T./Impostor Harrison W./Reverse-Flash
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: 2 - Follows: 1 - 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: 1,028,045 - Reviews: 3291 - Favs: 1,537 - Follows: 1,350 - 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: 31 - Follows: 32 - Updated: 6/18 - Published: 9/3/2021 - Franklin R., Invisible Woman/Susan S., Spider-Man/Peter P., Valeria R.
A Web of Problems (BRANCH of F&SM) by What If Universe reviews
What would change if Peter Parker met and had a child with a woman named Natalia Romanova? This was someone he met the same day Ronnie and he met Caitlin, and that day altered everything. Considering that at the end of the day, Peter is engaged to a woman who doesn't remember much about her past, doesn't care to discover much as she's afraid to know, and has a son to take care of.
Crossover - Flash & Avengers - Rated: K+ - English - Friendship/Family - Chapters: 5 - Words: 11,328 - Reviews: 3 - Favs: 29 - Follows: 28 - Updated: 6/18 - Published: 3/24 - [Spider-Man/Peter Parker, Black Widow/Natasha R.] Dr. Caitlin S., Cisco R.
Alternate Events 4: Multiversal Clashes 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: 12 - Words: 69,771 - Reviews: 78 - Favs: 20 - Follows: 24 - Updated: 6/17 - Published: 9/29/2021 - Barry A./The Flash, Clark K./Superman, Lex L., Conner K./Superboy - 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: 13 - Words: 54,386 - Reviews: 72 - Favs: 19 - Follows: 13 - Updated: 6/14 - Published: 10/13/2020 - Barry A./The Flash, OC, Kara D./Supergirl
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: 3 - Words: 19,091 - Reviews: 22 - Favs: 23 - Follows: 19 - Updated: 6/14 - Published: 1/28 - [Barry A./The Flash, Kara D./Supergirl, Lena L.]
United we stand, divided we fall by Bl4ckHunter reviews
An attempt of Tony Stark and Bruce Banner at creating a peacekeeping program Ultron backfires, so the Avengers, Oliver Queen and Barry Allen have to stand together against Ultron, despite the struggles that threaten to divide the entire group as they also face new enemies and find new allies.
Crossover - Flash & Avengers - Rated: T - English - Adventure - Chapters: 9 - Words: 28,192 - Reviews: 42 - Favs: 13 - Follows: 7 - Updated: 6/11 - Published: 6/5 - Complete
The Beginning of the Age of Heroes by ArrowverseFan833 reviews
Oliver, Barry, Kara, Laurel, Sara, and Thea are all trapped on Lian after going on the Queen's Gambit to have a celebration. See how the team becomes the heroes that the world will need them to be in the future. (The group is all from Starling City. Kara is taken in by the Queens and Barry is taken in by the Lances.)
Crossover - Flash & Arrow - Rated: T - English - Romance/Adventure - Chapters: 32 - Words: 36,183 - Reviews: 22 - Favs: 55 - Follows: 48 - Updated: 6/9 - Published: 6/7/2021 - [Oliver Q./Arrow/Green Arrow, Black Canary/Earth-1 D. Laurel Lance] Barry A./The Flash, Sara L. - Complete
What's Up, My Meta? by LycoX
In which Freeland, and later Central, takes one man's negativity and turns it into a positive much to his dismay. (Part of the 'Hijinks' series)
Crossover - Flash & Black Lightning - Rated: T - English - Chapters: 1 - Words: 511 - Favs: 2 - Follows: 1 - Published: 6/7 - Complete
Stuck Worlds by hunter.guiles.9 reviews
So I liked the hero swap. I thought about what happened if this was the price Oliver had to pay. Forcing them back to being each other's heroes. (Any help to create this new world would be awesome , I explained in the fanfic) Basically the world of cannon CW in the second reality jump in Elseworlds.
Crossover - Flash & Arrow - Rated: K - English - Humor/Drama - Chapters: 2 - Words: 1,053 - Reviews: 1 - Updated: 6/5 - Published: 3/21/2019 - Barry A./The Flash, Oliver Q./Arrow/Green Arrow
Special Delivery: Take Two! by LycoX
In which Jay makes a delivery to Freeland and sticks around afterwards during the events of 4x05.
Crossover - Flash & Black Lightning - Rated: T - English - Family/Friendship - Chapters: 1 - Words: 730 - Favs: 2 - Follows: 2 - Published: 6/4 - Jay G./The Flash, Jefferson P., Anissa P., P. Gambit - Complete
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