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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: 8 - Words: 55,332 - Reviews: 35 - Favs: 16 - Follows: 10 - Updated: 11/5 - Published: 2/19 - OC, Kara D./Supergirl
Darkest Days and Brightest Nights by Garfield.M.Logan reviews
What if Barry Allen wasn't the flash? And the bolt of lightning didn't choose him just yet, but someone else did. This is an AU story, inspired by the Amalgam comics. This is a SnowBarry and FlashFrost fanfic, and I do try to make it as realistic as possible whilst making it my own.
Crossover - Flash & Ghost Rider - Rated: M - English - Romance/Adventure - Chapters: 2 - Words: 3,770 - Reviews: 1 - Favs: 5 - Follows: 8 - Updated: 11/4 - Published: 3/26 - Barry A./The Flash, Dr. Caitlin S., Cisco R., Killer Frost
From Heartbreak To A New Beginning by changingdestiny40 reviews
Following a shocking betrayal from his wife and the resulting violent aftermath, Barry is taken in by a concerned Patty and Felicity, two of his closest friends. And they help him heal and lead him towards new and unexpected love. Volume II.IX of {MULTIVERSAL SAGA}
Crossover - Flash & Arrow - Rated: T - English - Hurt/Comfort/Romance - Chapters: 6 - Words: 18,925 - Reviews: 8 - Favs: 22 - Follows: 22 - Updated: 11/3 - Published: 12/11/2020 - [Barry A./The Flash, Patty S., Felicity S.] Oliver Q./Arrow/Green Arrow
Heroes coming together by Aragorn II Elessar reviews
The Singularity at the end of Flash Season 1 has graver consequences than anyone foresaw. Now, it is up to Heroes from various worlds to come together and defeat the forces of evil that have risen in the Singularity's wake. LOTR/MCU/Star Wars/Buffyverse/Smallville/Supernatural/Arrowverse crossover. Part 1 of 'When Legends meet'.
Crossover - Flash & Avengers - Rated: T - English - Adventure/Friendship - Chapters: 11 - Words: 88,830 - Reviews: 150 - Favs: 53 - Follows: 44 - Updated: 11/3 - Published: 8/27 - Barry A./The Flash, Cisco R., Captain America/Steve R., Thor
Blaze Speedster by killerssg reviews
Naruto is eight years old when the Kyuubi attack happens and life changes for him. Now eight years later, he finds out that his family who he thought was dead is actually alive. Being so upset he decides to quit being a shinobi knowing that everyone he thought he was friends with was on the plan and leaves Konoha. Slight Minato/Kushina bashing and Jiraiya bashing. Harem.
Crossover - Flash & Naruto - Rated: M - English - Chapters: 3 - Words: 38,207 - Reviews: 50 - Favs: 246 - Follows: 282 - Updated: 11/2 - Published: 10/9 - Naruto U., Mikoto U.
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: 18 - Words: 560,905 - Reviews: 765 - Favs: 1,956 - Follows: 1,985 - Updated: 10/31 - Published: 12/18/2015 - Linda P., Naruto U.
An Arrowverse Halloween by Taw2541 reviews
Come to Halloween Night at S.T.A.R. Labs and witness what your favorite superheroes and their friends dress up on the spookiest night of the year.
Crossover - Flash & Arrow - Rated: K+ - English - Humor - Chapters: 1 - Words: 2,073 - Reviews: 2 - Favs: 1 - Follows: 1 - Published: 10/31 - Barry A./The Flash, Oliver Q./Arrow/Green Arrow - Complete
Heroes 4th of July Gathering by changingdestiny40
Within this latest installment, the multiversal heroes and their loved ones and allies all come together to commemorate the 4th Of July. Part 5 of [Multiversal Holiday Gatherings: 2022-2023]
Crossover - Flash & Avengers - Rated: K - English - Friendship/Family - Chapters: 1 - Words: 1,514 - Published: 10/29 - Complete
Scarlet Spider & Speedster 3 : Flashpoint Paradox by What If Universe reviews
Barry Allen did it. He saved his mother and ruptured all of time and space. Now the ripple effect has taken place and ripples of distortion radiated from that point of impact, shifting everything just slightly, but enough to make a gigantic impact on the timeline. Friends have become enemies, enemies will never come to pass, and let's just say the universe will never be the same.
Crossover - Spider-Man & Flash - Rated: K+ - English - Family/Angst - Chapters: 3 - Words: 11,421 - Reviews: 1 - Favs: 16 - Follows: 12 - Updated: 10/29 - Published: 9/2 - [Peter P./Spider-Man, Mary Jane W.] [Dr. Caitlin S., Barry A./The Flash]
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: 3 - Words: 10,163 - Reviews: 3 - Favs: 11 - Follows: 20 - Updated: 10/14 - Published: 7/3 - Barry A./The Flash, Iris W., Eobard T./Impostor Harrison W./Reverse-Flash, Kara D./Supergirl
Something Else by Zuiri
Mick x Caitlin, following the events of "It Had to Be You." Multiple chapters. In an attempt to save the Legends from a mysterious group out to destroy them, Caitlin joins the team and begins a chaotic adventure through time.
Crossover - Flash & Legends of Tomorrow - Rated: M - English - Adventure/Romance - Chapters: 4 - Words: 25,477 - Favs: 1 - Follows: 2 - Updated: 10/12 - Published: 1/9
Legends of Tomorrow: Golden Rogue by ElementalDrift reviews
This story is a version of Legends of Tomorrow, which includes: Lisa Snart. In cannon Lisa had left The Flash in season 2, but in this we will see what happens when she sticks with her brother and partner, and later joins the Legends.
Crossover - Flash & Legends of Tomorrow - Rated: T - English - Chapters: 7 - Words: 28,754 - Reviews: 1 - Favs: 2 - Follows: 3 - Updated: 10/11 - Published: 12/26/2022
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: 12 - Words: 77,324 - Reviews: 45 - Favs: 68 - Follows: 68 - Updated: 10/9 - Published: 1/28/2022 - [Barry A./The Flash, Kara D./Supergirl, Lena L.]
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: 28 - Words: 162,728 - Reviews: 150 - Favs: 54 - Follows: 46 - Updated: 10/8 - Published: 8/25/2019 - [Barry A./The Flash, Kara D./Supergirl] [Dr. Caitlin S., OC]
Accidental Meeting by UltraPhantom reviews
After accidental getting stuck in Kara's world, Barry was ready to go home. Unfortunately, the Multiverse had other plans as the fastest man alive ends up in the Originals World. There Barry must decide on what to do as well as to who to trust. But can Barry get home before he gets too rope into the Michaelson's battle? AM: 1
Crossover - Flash & Originals - Rated: T - English - Supernatural/Friendship - Chapters: 2 - Words: 5,625 - Reviews: 9 - Favs: 10 - Follows: 12 - Updated: 10/7 - Published: 9/10 - Barry A./The Flash, Klaus M., Elijah M., Rebekah M.
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: 17 - Words: 115,968 - Reviews: 9 - Favs: 13 - Follows: 16 - Updated: 10/5 - Published: 12/30/2021 - Barry A./The Flash, Cisco R., Kara D./Supergirl, Alex D.
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: 20 - Words: 632,282 - Reviews: 96 - Favs: 134 - Follows: 145 - Updated: 9/30 - Published: 4/18/2021 - [Dr. Caitlin S., OC] Killer Frost
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: 8 - Words: 16,389 - Reviews: 54 - Favs: 62 - Follows: 77 - Updated: 9/29 - Published: 10/24/2021 - Barry A./The Flash, Oliver Q./The Arrow, Captain America/Steve R., Iron Man/Tony S.
The Avenging Flash (Book One) by G4dgetJunior reviews
In an alternate universe, Spiderman does not come into existence. Instead, a different hero rises to the call. The Flash! Steve x Natasha. Barry X Kara.
Crossover - Flash & Avengers - Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 16,099 - Reviews: 14 - Favs: 22 - Follows: 27 - Updated: 9/27 - Published: 8/6 - Barry A./The Flash, Eobard T./Impostor Harrison W./Reverse-Flash, Black Widow/Natasha R., Iron Man/Tony S. - Complete
To Hell and Back by Nyame reviews
The AU where Oliver, Barry, and Kara survive Lian Yu together for years, raising a baby Kal-El, and are eventually rescued – by the League of Assassins. (Note: This version is unedited. For main, edited version, go to AO3)
Crossover - Flash & Arrow - Rated: T - English - Adventure/Friendship - Chapters: 165 - Words: 530,190 - Reviews: 459 - Favs: 805 - Follows: 712 - Updated: 9/15 - Published: 12/17/2017 - [Barry A./The Flash, Iris W.] [Oliver Q./Arrow/Green Arrow, Black Canary/Earth-1 D. Laurel Lance]
Kara & Barry: Sparks & Forces by KeaneDragon reviews
As Barry leaves to Earth 1, Kara realises how much she pines for him. But neither have time to reflect. Barry returns to face a severe crisis in Earth 1. Kara is thrown into multiple crisis of her own. How & When How will the Duo meet & spark again?
Crossover - Flash & Supergirl - Rated: K+ - English - Adventure/Romance - Chapters: 10 - Words: 20,361 - Reviews: 10 - Favs: 7 - Follows: 8 - Updated: 9/14 - Published: 7/22 - [Barry A./The Flash, Kara D./Supergirl]
A Story of A Multiverse: Torn From My World by GrimesAllen08 reviews
Takes place after The Flash 2x23. In one reality, Barry created Flashpoint after the death of his father. In another, things took a drastic turn. Barry finds himself trapped in a completely different earth, ripped away from his loved ones and thrown into a constant battle for survival in a zombie apocalypse. Making friends and foes, old and new, can he survive? Or will he fail?
Crossover - Flash & Avengers - Rated: M - English - Sci-Fi/Angst - Chapters: 24 - Words: 81,388 - Reviews: 39 - Favs: 14 - Follows: 15 - Updated: 9/8 - Published: 4/8 - Barry A./The Flash, Black Widow/Natasha R., Captain America/Steve R., Iron Man/Tony S. - Complete
A Speedster in Sunnydale by fmfan1980 reviews
Barry wanted to change the past after the battle with Zoom. Instead of reaching his past, he finds himself stuck in a place of magic, demons, and vampires. A place that attracts the creatures of darkness, and is guarded by a peppy former cheerleader. (Undergoing rewrites.)
Crossover - Buffy: The Vampire Slayer & Flash - Rated: T - English - Chapters: 20 - Words: 98,386 - Reviews: 125 - Favs: 259 - Follows: 306 - Updated: 9/4 - Published: 7/29/2016 - [Buffy S., Barry A./The Flash]
Percy Jackson the Fastest Man Alive by WraithPlague049 reviews
Percy is betrayed and gains a incredible power.
Crossover - Percy Jackson and the Olympians & Flash - Rated: M - English - Adventure - Chapters: 2 - Words: 1,081 - Reviews: 1 - Favs: 5 - Follows: 6 - Published: 8/28 - Hunter Z./Zoom, Percy J.
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: 25 - Words: 156,053 - Reviews: 112 - Favs: 32 - Follows: 22 - Updated: 8/19 - Published: 11/26/2019 - Barry A./The Flash, Cisco R., Kara D./Supergirl
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