Ben 10 Crossovers
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The Alien Soldier by Nomadic Chaos reviews
What would happen if Naruto had found the Ultimatrix, and with the power of a seemingly vast array of power and possibility; as he now gains the opportunity to use this to rise up to greatness in his village, but also to become a great soldier and hero for Konoha. All the while contending from threats both on planet and beyond. Largely A.U, Rated M for Mature Themes and Violence.
Crossover - Naruto & Ben 10 - Rated: M - English - Sci-Fi/Adventure - Chapters: 7 - Words: 52,565 - Reviews: 50 - Favs: 96 - Follows: 100 - Updated: 11/4 - Published: 9/6 - Naruto U., Sasuke U., OC
Close Encounters of the Ghostly Kind by Kallin Presley 2 reviews
Ben, Gwen, and Grandpa Max stop at Amity Park to meet Max’s old ghost hunting friends. Unfortunately, for the likes of Ben Tennyson and Danny Fenton, there’s no such thing as a pleasant visit…
Crossover - Ben 10 & Danny Phantom - Rated: K - English - Adventure - Chapters: 1 - Words: 925 - Reviews: 2 - Favs: 6 - Follows: 7 - Published: 11/4
My Alien Academia by The Incredible Muffin reviews
Some worthy souls are chosen to carry the mantle of great heroes. Sometimes, this is destiny. Other times, it's all about being in the right universe, at the right time, chosen by the right watch.
Crossover - Ben 10 & My Hero Academia/僕のヒーローアカデミア - Rated: T - English - Adventure/Friendship - Chapters: 48 - Words: 437,959 - Reviews: 1553 - Favs: 2,310 - Follows: 2,402 - Updated: 11/2 - Published: 11/26/2019 - Ben T., Izuku M.
Leonardo Voorhees: Alien Chronicles by Pravus666 reviews
What happens when a 12-year-old Harry is given the Ultimatrix and given the chance to become something greater? Well this is that story, as we follow his misadventures in the world and the worlds beyond, with a legion ready to take on anyone. Rated M for Blood, Violence, Gore, and Mature Themes. Ultimatrix Harry AU. Harry X ?
Crossover - Harry Potter & Ben 10 - Rated: M - English - Sci-Fi/Fantasy - Chapters: 7 - Words: 55,229 - Reviews: 37 - Favs: 96 - Follows: 121 - Updated: 11/1 - Published: 6/29 - Harry P., Voldemort, OC, Charmcaster/Hope
Black Bull's Quartet Wreckers by Artzilla406
Long ago, a powerful and ruthless demon threaten the realm, humanity was in the brink of destruction. However a lone mage accompanied with eight magic knights, vanquish the demon with all their might. After their triumph the lone mage was crown the wizard king and the eight wizards disappeared, now four new wizards will step forward and take the path to become the wizard kings.
Crossover - Ben 10 & Black Clover/ブラッククローバー - Rated: M - English - Fantasy/Adventure - Chapters: 6 - Words: 107,383 - Favs: 7 - Follows: 7 - Updated: 11/1 - Published: 2/21
The Tennyson Priestess Logs by SilverSoulmmc reviews
Side Stories of Yukiko and her family during their summer vacation! Filled with humor, friendship, romance, and lots of property damage!
Crossover - Ben 10 & Persona Series - Rated: T - English - Family/Adventure - Chapters: 21 - Words: 39,249 - Reviews: 53 - Favs: 28 - Follows: 34 - Updated: 11/1 - Published: 12/20/2021 - Ben T., Gwen T., Max T., Yukiko A.
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: 41 - Words: 69,943 - Reviews: 13 - Favs: 60 - Follows: 74 - Updated: 11/1 - Published: 12/31/2021 - [OC, T. Harribel, Yoruichi S.]
Ten Times The Hero by Hornets88 reviews
Izuku Midoriya is about to give up on his dreams of heroism when a teenager clad in a green jacket and a man claiming to be a professor break into his room in broad daylight. Ben Tennyson and Professor Paradox have travelled to the My Hero universe in order to find a worthy successor to wield the Omnitrix once Ben passes... and they firmly believe Izuku is worthy to inherit it.
Crossover - Ben 10 & My Hero Academia/僕のヒーローアカデミア - Rated: T - English - Sci-Fi/Adventure - Chapters: 20 - Words: 160,219 - Reviews: 142 - Favs: 382 - Follows: 492 - Updated: 11/1 - Published: 9/28/2021 - [Izuku M., Kyoka Jiro] Toshinori Y./All Might, 1-A Students
Alien kid in a Monster world by Feedbackblast18 reviews
Dan Tennyson is just your average kid that has moved to New Salem. But when he discovers a strange watch that can turn him into 10 different aliens, a whole new world opens up for him. Especially if that world has him making friends with real life monsters as well. Dan and the students of Monster High are going to find themselves on adventures around and out of this world.
Crossover - Ben 10 & Monster High - Rated: K+ - English - Adventure/Humor - Chapters: 1 - Words: 4,407 - Reviews: 4 - Favs: 15 - Follows: 12 - Published: 10/31 - OC, Clawdeen W., Spectra V.
Ben 10: Futo Adventures by Bigby the Big Bad Wolf reviews
Two-Shot Crossover, Up for Adoption. Ben Tennyson has come to the city of Futo thanks to a mysterious tip. Seeking out the Narumi Detective Agency, he ends up joining forces with the two-in-one detective against those who would make the city cry. Now, count up your sins because it's Hero Time!
Crossover - Ben 10 & Kamen Rider - Rated: T - English - Adventure/Mystery - Chapters: 2 - Words: 22,248 - Reviews: 5 - Favs: 16 - Follows: 11 - Published: 10/31 - Ben T., Akiko N., Philip/Raito S./W, Shotaro H./W - Complete
Security In Family's Arms by GoldGuardian2418 reviews
Vanny is back and she's after Gregory and Freddy. Can the two escape to a safe haven? Can the other animatronics be free of the Glitchtrap virus? Let's find out. :) *FNAF: Security Breach/Ben 10 crossover*
Crossover - Ben 10 & Five Nights at Freddy´s - Rated: T - English - Family/Hurt/Comfort - Chapters: 1 - Words: 5,648 - Reviews: 2 - Favs: 6 - Follows: 2 - Published: 10/31 - Rook, Freddy Fazbear, Gregory, Sun/Moon - Complete
Lost Tales Of The Two Mages by GoldGuardian2418 reviews
What if Luz wasn't the only human to come to the Boiling Isles by chance? Two universes collide, this time leaving Rachel and Lea stranded in the Boiling Isles. Will they survive and find a way home? Co-written with Redbat132. :)
Crossover - Ben 10 & Owl House - Rated: K+ - English - Friendship/Adventure - Chapters: 4 - Words: 11,482 - Reviews: 4 - Favs: 8 - Follows: 7 - Updated: 10/31 - Published: 6/20 - OC, Luz N., Eda, Hooty
A Hopeful Fright to Remember by GoldGuardian2418 reviews
When Blue Lantern Lea and Green Lantern Hal walk into a haunted fortress, they didn't expect to go to a new timeline altogether. *Ben 10/Green Lantern Animated crossover* Collab with Redbat132. :) Cover art done by alvaxerox on Deviantart. :)
Crossover - Misc. Cartoons & Ben 10 - Rated: K+ - English - Friendship/Adventure - Chapters: 1 - Words: 4,664 - Reviews: 2 - Favs: 1 - Published: 10/31 - Complete
Omni Hero-Deku by blazeninja0 reviews
His goal in life was to be a hero and along with the gifts that he has gained, he will be one. Mini extra crossovers with the story. Izuku x Hearm
Crossover - Ben 10 & My Hero Academia/僕のヒーローアカデミア - Rated: M - English - Humor/Adventure - Chapters: 10 - Words: 90,453 - Reviews: 13 - Favs: 165 - Follows: 177 - Updated: 10/31 - Published: 12/2/2021 - [Izuku M., Nemuri K./Midnight, Momo Y., Ochako U.]
Naru10 by blazeninja0 reviews
Naruto found the Omnitrix when he was 10; This is the story on how he saved the universe. He will go along with help from all across the stars Mass Crossover Naruto x Harem.
Crossover - Naruto & Ben 10 - Rated: M - English - Sci-Fi - Chapters: 30 - Words: 90,026 - Reviews: 64 - Favs: 343 - Follows: 338 - Updated: 10/31 - Published: 5/11/2020 - Naruto U.
In Marvel With The Omnitrix by SHplayer reviews
A Man who lost everything he owned because of people who were his friends when he was little, and so with nothing else to do he started to watch movies and cartoons, but there was one cartoon and movie that fascinated him the most and they were Ben 10 and marvel.
Crossover - Ben 10 & Marvel - Rated: T - English - Adventure/Humor - Chapters: 4 - Words: 9,791 - Reviews: 10 - Favs: 31 - Follows: 36 - Updated: 10/31 - Published: 10/6 - OC, B. Banner/Hulk, T. Stark/Iron Man, P. Parker/Spider-Man
Ben 10: Winter's Secrets by I craft experiences reviews
The Official Sequel to Age of Marvels, the long awaited crossover with CATWS. Two years after the events of New York, a web of conspiracies reveal dark secrets between the Plumbers and SHIELD, and an old foe resurfaces... How will these new revelations change our heroes?
Crossover - Ben 10 & Avengers - Rated: T - English - Adventure/Sci-Fi - Chapters: 3 - Words: 23,770 - Reviews: 26 - Favs: 62 - Follows: 56 - Updated: 10/31 - Published: 9/4 - Ben T., Black Widow/Natasha R., Captain America/Steve R., Kevin
LES MUSICIENS DU MONDE ARC III 2011 TO 2016 by DanteVirgil09 reviews
This is the final arc of this particular saga where it is reaching closer and closer to its climax. When transcending choice for others and making them for some, where every emotion and motive for all characters will have to face and handle to the best of their abilities. Will everyone rise and pave their destinies or fall from grace? But all roads lead to the stars in the end.
Crossover - Evangelion & Ben 10 - Rated: M - English - Adventure/Drama - Chapters: 22 - Words: 360,370 - Reviews: 12 - Favs: 7 - Follows: 11 - Updated: 10/31 - Published: 3/12/2016
Obnoxious Aliens Times 10 by MJWatt1998 reviews
Ben is pitted in a game of tag against a cute alien girl named Lum Invader who belongs to a race called Oni where they have come to take over the Earth. He is given a week to touch Lum's horns as part of the rules or else his planet is doomed.
Crossover - Urusei Yatsura & Ben 10 - Rated: K - English - Sci-Fi/Humor - Chapters: 3 - Words: 13,573 - Reviews: 9 - Favs: 26 - Follows: 25 - Updated: 10/31 - Published: 10/10 - Lum, Ben T., Max T., Rook
The Hiccup Cup Group Project by PKMN37 reviews
This is an anthology story of some of our favorite characters given the hiccups through a mysterious, shape-shifting chalice. The Hiccup Cup can take the form of any cup, from plastic to its original iron form. Its origins are unknown but some believe that it was created by a hiccup-loving wizard of a faraway kingdom to give the women of the town hiccups at will.
Crossover - Ben 10 & Pokémon - Rated: M - English - Chapters: 33 - Words: 89,968 - Reviews: 6 - Favs: 10 - Follows: 5 - Updated: 10/31 - Published: 5/29/2019 - Ash K./Satoshi, Misty/Kasumi, Gwen T., Julie Y.
Omnitrix Vampire by TopModelCollectorY2K reviews
What if Ben and Moka didn't meet at Yokai academy, but met when the Tennysons travel to Japan during their journey in 2006? What if they hoped to see each other again? What if they did and they were, unknown to them, about to be sent to the same high school in Japan.
Crossover - Ben 10 & Rosario + Vampire - Rated: T - English - Sci-Fi/Romance - Chapters: 5 - Words: 21,461 - Reviews: 3 - Favs: 37 - Follows: 35 - Updated: 10/31 - Published: 3/12/2021
Aliens and Exorcists by myzor king of war reviews
My first Ben 10 Blue Exorcists crossover which is also the first of its kind sorry I'm not very good at Summaries. Rating changed to M due to chapter 7.
Crossover - Ben 10 & Blue Exorcist/青の祓魔師 - Rated: M - English - Adventure - Chapters: 22 - Words: 57,218 - Reviews: 69 - Favs: 43 - Follows: 38 - Updated: 10/31 - Published: 5/8/2015
Omniverse Earth-38 by choejhulkp9 reviews
The multiverse is a big, wide open space of possibilities. Think of them like snowflakes: they look similar but they're different enough. This earth is no different. A citizen of earth finds himself wielding the most powerful weapon in the universe. It stuck itself upon his wrist with secrets that it hid. Now he's got superpowers, he's no ordinary kid. He's...well, you get it.
Crossover - Ben 10 & DC Superheroes - Rated: M - English - Chapters: 8 - Words: 257,015 - Reviews: 207 - Favs: 721 - Follows: 755 - Updated: 10/30 - Published: 1/1/2021 - C. Kent/Kal-El/Superman, Kara Z./Supergirl, OC
The Loud 10: Omnitrix Team Adventures by Harriet546 reviews
Lincoln Loud, the Omnitrix Team and the Omnitrix itself are as heroic as always. Join Lincoln and the Omnitrix Team as they go through adventures with heroic friends, make new ones, and fight to save the world and other worlds like it. (Inspired by The Loud 10 by GokuSannin9000).
Crossover - Ben 10 & Loud House - Rated: K+ - English - Adventure/Humor - Chapters: 65 - Words: 281,653 - Reviews: 30 - Favs: 45 - Follows: 36 - Updated: 10/30 - Published: 6/26/2018 - Lincoln L., Luna L., OC, Ronnie Anne S.
Ben 10: Hero Force by DBZpower197 reviews
It had now been 3 years since Ben took a chance at a normal life. However, history had a tendency to repeat and life had a tendency to be unfair. With the news of someone person putting in a good word for him at UA, Ben would once again don the Omnitrix and face the challenges ahead all the while having one question in mind: "Could he meet the legacy of that watch once again?"
Crossover - Ben 10 & My Hero Academia/僕のヒーローアカデミア - Rated: T - English - Adventure/Sci-Fi - Chapters: 22 - Words: 217,845 - Reviews: 442 - Favs: 588 - Follows: 688 - Updated: 10/30 - Published: 4/19/2021 - Ben T., Izuku M., Momo Y., 1-A Students
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