Ben 10 Crossovers
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Earth's Mightiest Heroes by UltraPhantom reviews
When the powerful King Detritus and his massive army invade Earth, a group of unaligned heroes and a certain Anti-Hero, discover the only way to fend off the attack will be to work together as a cohesive unit. The Blur, Ben 10, Cat Noir, American Dragon, Gwen, Danny Phantom, Ninja, and Kevin combine their respective talents in an all-out battle to save the planet. YJHU: 1
Crossover - Danny Phantom & Ben 10 - Rated: T - English - Supernatural/Sci-Fi - Chapters: 9 - Words: 25,693 - Reviews: 29 - Favs: 50 - Follows: 54 - Updated: 8/27 - Published: 3/18/2020 - Danny F., Ben T., Gwen T., Kevin
Unity by UltraPhantom reviews
In their own world, Ben 10, Danny Phantom, American Dragon, Kim Possible, Generator Rex, and Stitch are all heroes. They help save the world and stop evil. But what if in this world, none of them are heroes at all? They are broken pieces of heroes seeking acceptance. Together they unite and venomized this world of evil, even if they have to get blood on their hands.
Crossover - Danny Phantom & Ben 10 - Rated: T - English - Hurt/Comfort/Drama - Chapters: 3 - Words: 7,905 - Reviews: 6 - Favs: 17 - Follows: 18 - Updated: 8/27 - Published: 4/23 - Danny F., Ben T.
Ben 10: Justice League (the series) by darkstorm1364 reviews
Ben Tennyson was abducted by aliens when he was 10 years old after accidentally received the Omnitrix, but then got rescued by Tetrax. He also brought Rook Blonko with his side. Both Ben and Rook are orphans, where Tetrax trained them to become the Galactic Guardians. Then after reaching his teen years, he received the Ultimatrix and recruiting more members.
Crossover - Justice League & Ben 10 - Rated: T - English - Adventure/Drama - Chapters: 16 - Words: 118,907 - Reviews: 74 - Favs: 199 - Follows: 189 - Updated: 8/27 - Published: 6/7/2020 - Clark K./Kal-El/Superman, Linda L./Kara Zor-El/Supergirl, Ben T., Rook
Just Another Day at the Office by Darthkvzn
Spectre-turned-bounty hunter (and unwilling interdimensional traveler) Jane Shepard arrives at her base of operations on Knowhere to embark on a mission to this dimension's version of Earth - one that could help her find her way back to the universe she was ripped from... (F!Shepard, multicrossover, part of the Kryptonverse series!)
Crossover - Ben 10 & Mass Effect - Rated: T - English - Adventure - Chapters: 3 - Words: 9,060 - Favs: 15 - Follows: 14 - Updated: 8/26 - Published: 6/25 - EDI, Shepard
My Hero Academia: Rising Alliance by Super Saiyan 4 Rukido reviews
Earth as we know it today felt like they could expect anything. They had Heroes with powerful Quirks, technology that benefited them greatly and a society that wouldn't crumble to pieces easily. What's there to worry about? How about Villians hellbent on world domination, a few secret organizations and Aliens from Space? Lucky for the Earth it has it's own protectors just for them!
Crossover - Ben 10 & My Hero Academia/僕のヒーローアカデミア - Rated: T - English - Adventure - Chapters: 25 - Words: 185,109 - Reviews: 133 - Favs: 137 - Follows: 150 - Updated: 8/26 - Published: 5/23/2021 - OC, Ship, 1-A Students
Fleeting Dream! by Gr33dy-N1ghtmar3 reviews
A punishment deserves a just cause. But it lack thereof would cause unwarranted misfortune. A world where human and monsters reign together, the fight for supremacy would ensure chaos. What happens when it is fate weaving the future of torch bearers? Destined to shape of the next era, be it feud or treachery, if it fate that rolls the dice, then they are all pawns to be played.
Crossover - One Piece & Ben 10 - Rated: T - English - Adventure/Fantasy - Chapters: 1 - Words: 4,898 - Reviews: 5 - Favs: 8 - Follows: 8 - Published: 8/26 - Ben T.
Ben 10 RWBY Chibi: A Series of Shenanigans by The Omni-Remnant reviews
Ever since the cancellation of their show a couple years ago, the cast of RWBY Chibi have been isolated in the halls of Beacon Academy, simply wishing for SOMETHING to happen. However, little do they know that they're about to be visited by a certain Alien Trio and EVO, kickstarting what will undoubtedly be the greatest, funniest time of their lives!
Crossover - Ben 10 & RWBY - Rated: T - English - Humor/Parody - Chapters: 15 - Words: 55,623 - Reviews: 85 - Favs: 125 - Follows: 120 - Updated: 8/26 - Published: 12/24/2020 - [Ben T., Yang X.L.] Gwen T., Team RWBY
RWBY 10 by AsinfulParadox
When an alien watch from space lands at Ruby's feet she is granted the power of different aliens! With this power and the temporary closing of Beacon Ruby teams up with new friends to become an alien superhero!
Crossover - Ben 10 & RWBY - Rated: T - English - Adventure/Supernatural - Chapters: 1 - Words: 3,312 - Favs: 5 - Follows: 10 - Published: 8/24 - Vilgax, Ruby R., OC
The Omni-Rose Huntress - Ruby Rose by Kaizerthewriter reviews
The Omnitrix, a weapon capable of the either intergalactic peace or massive universal destruction. In one universe, the prototype was created by Azmuth of the Galvan and landed in the hands of a young Benjamin Tennyson. But in this universe (this story), not only was it created by another alien, but it also landed in the hands of a more... simple soul. (Rated M just in case)
Crossover - Ben 10 & RWBY - Rated: M - English - Adventure/Sci-Fi - Chapters: 1 - Words: 3,658 - Reviews: 3 - Favs: 26 - Follows: 36 - Published: 8/24 - Ozpin, J. Ironwood, Team RWBY, Team JNPR
Young Alien Justice by JungleFurious reviews
Nathan Hart was just an ordinary teen ready to begin his summer vacation, but soon he discovered a strange watch that could transform him into 10 superpowered aliens. this puts him on notice with the Justice League and decide to have him be a part of a team of young aspiring heroes. Together, they'll face threats such as criminals, robots, society of villains, and alien conquerors.
Crossover - Ben 10 & Young Justice - Rated: T - English - Adventure/Sci-Fi - Chapters: 5 - Words: 38,902 - Reviews: 77 - Favs: 139 - Follows: 154 - Updated: 8/23 - Published: 1/22 - [OC, Raquel E./Rocket] Vilgax, Hal J./Green Lantern
Amalgamation part 2: Ascension by epic insanity666 reviews
Summer Vacation over, his family grown beyond expected, Kenneth Tennyson moves to settle down and get his future plans started... if only a certain cyclops hadn't sent him on a one man mission to Japan filled with soul eating demons, wild magic trying to escape oh and dead people... dead people everywhere. Well, this will be interesting. Harem story
Crossover - Bleach & Ben 10 - Rated: M - English - Adventure/Supernatural - Chapters: 40 - Words: 68,822 - Reviews: 13 - Favs: 57 - Follows: 70 - Updated: 8/23 - Published: 12/31/2021 - [OC, T. Harribel, Yoruichi S.]
The Sixth Titan Omni by Chance Green G King reviews
Little do people know is that there is life beyond the stars and our own planet. There are all kinds of hero's, each with different stories about how they become great. Join a teen armed with a device that holds the key to understanding all life in the universe as he joins a team of hero's to heal old wounds and make new memories. He has many names, but let's call him Omni.
Crossover - Teen Titans & Ben 10 - Rated: T - English - Sci-Fi/Friendship - Chapters: 18 - Words: 154,953 - Reviews: 175 - Favs: 243 - Follows: 255 - Updated: 8/22 - Published: 10/5/2018 - Raven, Khyber, OC, Malware
The Worth Of A Hero Is Not Their Power, But The Heart Inside Of Them by GoldGuardian2418 reviews
The Grant Mansion residents get a surprise visit from someone who looks just like a good friend of theirs and who needs some convincing that she can be the hero others believe she can be. Co-written with Redbat132. :)
Crossover - Ben 10 & Miraculous: Tales of Ladybug & Cat Noir - Rated: K+ - English - Friendship/Hurt/Comfort - Chapters: 1 - Words: 4,642 - Reviews: 2 - Favs: 3 - Published: 8/21 - Complete
The 10th Titan by Chaser Red Productions reviews
When the last of Humanity faces Extinction against a seemingly endless force of Carnivorous giants, an ace in the hole arises in the form of a Titan...Who could change shape? With the wielder of the Omnitrix, could they begin to turn the tide of this endless war?
Crossover - Ben 10 & Attack on Titan/進撃の巨人 - Rated: M - English - Chapters: 5 - Words: 21,138 - Reviews: 20 - Favs: 53 - Follows: 64 - Updated: 8/21 - Published: 5/28/2021 - Ben T., Eren Y., Armin A., Annie L.
Ben 10: Earth's Mightiest Heroes by Firestorm808 reviews
Ben is sent to the world of Earth's Mightiest Heroes! With political and cosmic danger on the rise, it's up to Ben and the Marvel heroes to set things straight. (Tying up loose plot holes. Connecting various other Marvel shows. Cover image from Promsien.)
Crossover - Ben 10 & Avengers: Earth's Mightiest Heroes - Rated: T - English - Adventure/Romance - Chapters: 14 - Words: 48,285 - Reviews: 403 - Favs: 962 - Follows: 1,031 - Updated: 8/21 - Published: 4/21/2018 - Ben T.
Ringo 10 by daveping243
Ringo and her two best friends go on a road trip with her father over the course of summer vacation. Little did they know, this road trip was going to get freaky and action-packed when Ringo and her friends find the Omnitrix after they saw it land in a forest. Now they all have to fight off creatures of all shapes and sizes that suddenly start appearing in their world.
Crossover - Ben 10 & Puyo Puyo - Rated: T - English - Adventure - Chapters: 2 - Words: 9,272 - Updated: 8/20 - Published: 6/30 - Ringo A., Risukuma, Sasaki M.
IZUKU 10 by Comments sensefic reviews
"Deku I don't care that you are now a furry wrestling cat it doesn't give you the balls to talk like Hulk Hogan." 10 year old Baku ." Listen here Katsuki Bakugo ,Rath doesn't what know what you are referring Rath to Hulkamania." the tiger said. "Fuck oi man hands help out here." "Itsuka doesn't know what the Bakugou is saying but Itsuka will help with Hulkamania."
Crossover - My Hero Academia/僕のヒーローアカデミア & Ben 10 - Rated: T - English - Sci-Fi/Friendship - Chapters: 2 - Words: 19,356 - Reviews: 3 - Favs: 23 - Follows: 26 - Updated: 8/20 - Published: 7/31 - Izuku M., Itsuka K., Katsuki B., Azmuth
James Harem 2 by GreyKing46 reviews
It has been two years since Brother Blood. Two years since the Titan's went their own ways. To learn, to train, to grow stronger. Now they return, stronger than ever, as their greatest challenges look just over the horizon. No longer Teens, they are the Titan's. And they will fight together, until the the end. James(OC)XHarem. NightwingXDuela. ChangelingXHarem. CyberianXSarah
Crossover - Teen Titans & Ben 10 - Rated: M - English - Adventure/Romance - Chapters: 101 - Words: 533,579 - Reviews: 1053 - Favs: 512 - Follows: 484 - Updated: 8/19 - Published: 4/21/2018 - [OC, Starfire, Raven, Jinx]
The Royal We by Darthkvzn reviews
Fresh from surviving the coup that took the lives of their parents, Akiridion Royals Aja and Krel Tarron need a place to lay low, and SWORD believes that can be Arcadia, under Ben 10's protection. Ben's pretty sure he can handle it, after taking down Vilgax, but the heirs to the Akiridion throne might draw in their own trouble... (a sequel to Changing of the Guard, multicrossover)
Crossover - Ben 10 & 3Below: Tales of Arcadia - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 15,687 - Reviews: 13 - Favs: 27 - Follows: 27 - Updated: 8/18 - Published: 1/20 - Ben T., Julie Y., Princess Aja Tarron, Prince Krel Tarron
Omniverse:Justice League by TennysonForce reviews
When Animo send Ben to another universe he meets the Justice League. Now he needs to adjust this new universe and help out the heroes as well and who knows maybe he'll find love. Cause He's the baddest kid ever to save the day.
Crossover - Ben 10 & Justice League - Rated: T - English - Adventure/Romance - Chapters: 6 - Words: 7,605 - Reviews: 40 - Favs: 117 - Follows: 119 - Updated: 8/17 - Published: 10/13/2020 - Ben T., Barbara Gordon/Batgirl/Oracle
Justice Matrix by AUfan62 reviews
Ben crossed over into the YJ universe. (No he doesn't lose everything he loves.) Now he joins a newly formed team. Takes place after series 1 Ben is 13 didn't give up the Omnitrix. Ben/Zatanna pairing.
Crossover - Ben 10 & Young Justice - Rated: T - English - Adventure - Chapters: 18 - Words: 151,922 - Reviews: 345 - Favs: 592 - Follows: 643 - Updated: 8/16 - Published: 7/18/2019
An Omni Titan by LinkSkywalk3r reviews
Ben Tennyson lost his team, his family, and is now in a new world with the Omnitrix. He's broken, lost, and lonely, but when the world needs another hero he'll be there.
Crossover - Teen Titans & Ben 10 - Rated: M - English - Adventure - Chapters: 1 - Words: 2,990 - Reviews: 1 - Favs: 17 - Follows: 18 - Published: 8/16 - Kara Z./Supergirl, Ben T., Ship
BURN THE ALIEN HERO by Shinobi360 reviews
These past few months since Ben had defeated the Dagon had proven to be quite uneventful. That would change with a mission given to him by Grandpa Max. One unlike any he'd ever been set on. To aid two teenage girls: Ninny and Noel,in their quest to protect London from Dragons.
Crossover - Ben 10 & Burn the Witch - Rated: T - English - Fantasy/Adventure - Chapters: 1 - Words: 4,955 - Reviews: 10 - Favs: 13 - Follows: 14 - Published: 8/15 - Ben T., Ninii S., Noel N., Balgo
Ben 10: Reincario by omnimegalander reviews
Nearly 15 years after sacrificing himself to save the Tree of Beginning from its untimely end, Lucario's destiny changes upon meeting a mysterious professor. Now on a brand new world with creatures of every shape and size, Lucario works alongside the hero of the universe, Ben Tennyson, to protect the innocent and fight against powerful villains, both old and new.
Crossover - Pokémon & Ben 10 - Rated: T - English - Adventure/Sci-Fi - Chapters: 10 - Words: 76,346 - Reviews: 23 - Favs: 69 - Follows: 71 - Updated: 8/14 - Published: 3/16/2020 - [Ben T., Julie Y.] Lucario, Prof. Paradox
A New World by Pnyk reviews
Kevin and Gwen found themselves in another universe after their whole universe was destroyed due to a dimensional warlord. Watch as they find themselves on an Earth filled with shapeshifting robots and other humans. What will the two Plumbers do?, will they join another alien war when they find themselves enrolled in it? I own nothing all belong to their respective creators.
Crossover - Transformers/Beast Wars & Ben 10 - Rated: M - English - Sci-Fi/Romance - Chapters: 1 - Words: 1,326 - Reviews: 1 - Favs: 4 - Follows: 4 - Published: 8/13 - Optimus Prime, Gwen T., Kevin
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