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The Omnitrix and the Umbral Star by JDog2K reviews
In one world, two thirds of the Extella Trio are having a ball with who may be their greatest partners, Tamamo with an unlucky spiky teen with a mysterious right hand, Nero with a boy with more guts then one hundred spec ops soldiers, but what about the final member? Well she gets flung into a different world and entwines her fate with that of a young watch wearing hero of course!
Crossover - Ben 10 & Fate/stay night - Rated: T - English - Sci-Fi/Adventure - Chapters: 10 - Words: 46,376 - Reviews: 68 - Favs: 96 - Follows: 110 - Updated: 18h - Published: 7/15 - Ben T., Attila the Hun
Ben 10 meets dc superhero girls part 1 by skipper.weinkauf reviews
Ben 10 goes to another universe to meet the superhero girls, as well as other heroes throughout the multiverse
Crossover - DC Super Hero Girls & Ben 10 - Rated: K+ - English - Adventure/Sci-Fi - Chapters: 29 - Words: 98,919 - Reviews: 44 - Favs: 35 - Follows: 36 - Updated: 23h - Published: 2/20 - Ben T., Kara K./Supergirl, Wonder Woman, Rook
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: 1 - Words: 3,150 - Reviews: 1 - Favs: 2 - Follows: 1 - Published: 10/10 - Lum, Ben T., Max T., Rook
Cartoon Heroes Unite by HeroesUnite2020 reviews
Cartoon Heroes Unite fight against evil from various dimensions. Ben Tennyson, Jake Long, Steven Universe, Danny Phantom and Jenny Wakeman join forces to defeat Aku, Bill Cipher and other villains. They are lured into a trap and sent to other dimensions. Will they manage to return and defeat evil? Robotboy, Rex Salazar, Teen Titans are joining them to defeat Aku.
Crossover - Kim Possible & Ben 10 - Rated: T - English - Adventure/Mystery - Chapters: 17 - Words: 52,324 - Reviews: 3 - Favs: 9 - Follows: 9 - Updated: 10/10 - Published: 7/10/2020 - [Kim P., Ron S.] [Ben T., Rook]
XL 12: The Series by XLR8 The Fox reviews
When a Fox/Kitsune mobian hybrid obtains the most powerful device in the universe, the Xenotrix, he must defend his planet and beyond against all who side with evil, with his brother, cousin and tons of friends by his side, he will never give up to save all of those in need, IT'S BLAZING TIME Cover art by my friend Rickthehedgewolf on DeviantArt
Crossover - Sonic the Hedgehog & Ben 10 - Rated: M - English - Adventure/Sci-Fi - Chapters: 8 - Words: 84,169 - Reviews: 16 - Favs: 14 - Follows: 14 - Updated: 10/10 - Published: 4/23/2020
Hero of Konoha by Shinobi360 reviews
In a universe where the society of the world is dominated by Ninjas, an alternate Ben Tennyson sets off on a journey to become the greatest hero to have ever lived. No matter what hardships may come his way,he remains undeterred in his beliefs, and strengthened by the faith shared by his friends and family. Amongst them,a Naruto Uzumaki with a great ambition: to become Hokage.
Crossover - Ben 10 & Naruto - Rated: T - English - Fantasy/Adventure - Chapters: 1 - Words: 5,823 - Reviews: 3 - Favs: 14 - Follows: 15 - Published: 10/10 - Ben T., Naruto U.
Fairy x10 by Ciel Binns reviews
After recreating a universe, Ben is sent to another universe filled with Magic, Dragons, God's, and Demons. Watch as he battles various mages, dragons, and insane black mage in order to help the people he cares about.
Crossover - Ben 10 & Fairy Tail - Rated: K - English - Adventure/Romance - Chapters: 4 - Words: 34,143 - Reviews: 12 - Favs: 34 - Follows: 36 - Updated: 10/9 - Published: 9/17
Ben 10 the shifter by Ben 1000000 reviews
I looked around and saw that there were not that many ben 10 x mha with ben having the omnitrix like there were only 27 out of 100 storys with just ben and in 2 of then ben didn't have omnitrix. In this ben dies of old age at 110 and is reborn in mha world, and due to certain circumstances ben will have to be a hero again, ben will help the next gen of hero in his own wayEXPERIMENT
Crossover - Ben 10 & My Hero Academia/僕のヒーローアカデミア - Rated: M - English - Chapters: 4 - Words: 20,094 - Reviews: 7 - Favs: 32 - Follows: 38 - Updated: 10/9 - Published: 7/30 - Ben T., 1-A Students, 1-B Students
BEN 10: The Omni Irregular by ALPHA02FURY97 reviews
BEN 10: Commonplace to world's strongest. NOTE: This is my very first Ben 10 X Arifureta Crossover so please don't judge. In this Story I'll be using Plumber cadet trainee No watch Ben Tennyson. Takes place after The Time war with Vilgax from Ben Prime Timeline.
Crossover - Ben 10 & Arifureta Shokugyou de Sekaisaikyou/ありふれた職業で世界最強 - Rated: M - English - Adventure/Fantasy - Chapters: 14 - Words: 35,888 - Reviews: 12 - Favs: 15 - Follows: 18 - Updated: 10/9 - Published: 9/12 - Ben T., Yue, S. Kaori - Complete
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: 1 - Words: 1,468 - Reviews: 3 - Favs: 9 - Follows: 10 - Updated: 10/8 - Published: 10/6 - OC, B. Banner/Hulk, T. Stark/Iron Man, P. Parker/Spider-Man
10 Story Pitches in 2K words by Shinobi360 reviews
I'll be pitching 10 story concepts to you under a word length of 2K words. Whichever one interests you the most will be my next story. And you have a chance in being involved with it as a co-writer! Read for more details.
Crossover - Ben 10 & Anime X-overs - Rated: T - English - Adventure - Chapters: 17 - Words: 21,866 - Reviews: 117 - Favs: 12 - Follows: 11 - Updated: 10/8 - Published: 6/3 - Ben T., Naruto, Bleach, Dragon Ball Z
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: 21 - Words: 201,432 - Reviews: 422 - Favs: 561 - Follows: 655 - Updated: 10/8 - Published: 4/19/2021 - Ben T., Izuku M., Momo Y., 1-A Students
The Ultimate Alliance by Ashtech301 reviews
Captain Marvel gets thrown into an alternate reality when she tries to attack Thanos alone, without the help of the avengers. Ben has the same thing done to him by Proffesor Paradox during a fight with Aggregor. Will both heroes take on the responsibilities of protecting those realities, or will they still be haunted by the errors of their past? PS: They will meet at some point
Crossover - Ben 10 & Captain Marvel - Rated: K+ - English - Adventure/Drama - Chapters: 11 - Words: 33,727 - Reviews: 21 - Favs: 27 - Follows: 29 - Updated: 10/8 - Published: 9/22/2020 - Ben T., Prof. Paradox, C. Danvers/Vers
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: 5 - Words: 34,548 - Reviews: 41 - Favs: 84 - Follows: 89 - Updated: 10/7 - Published: 9/6 - Naruto U., Sasuke U., OC
Tom 10 by Alphamon Burstmode X reviews
On a camping trip with his family, young Tommy Pickles' life is changed forever as a pod falls from the sky containing a watch-like device which can change him in to a plethora of different alien creatures. Join Tommy as he learns the secrets of the Omnitrix and works to one day become the hero of heroes. (Tommy x Kimi) (Please enjoy, fav, and review.)
Crossover - Rugrats/All Grown Up! & Ben 10 - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 6,291 - Reviews: 9 - Favs: 19 - Follows: 20 - Updated: 10/7 - Published: 3/29/2021 - [Tommy P., Kimi F.] Angelica P., Dil P.
The Infinity Legion:Fairy Tail by Jerry Ruffin reviews
After the Darkentors and save the entire Multiverse, the Infinity Legion travels across the Multiverse as its protectors. They travel to the Fairy Tail world where they meet the Fairy Tail Mages. They face many challenges together. The Elodas story arc is out.
Crossover - Ben 10 & Fairy Tail - Rated: T - English - Sci-Fi/Fantasy - Chapters: 14 - Words: 112,350 - Reviews: 16 - Favs: 15 - Follows: 11 - Updated: 10/7 - Published: 7/2
Omni Boys by AUfan62 reviews
While fighting both Kevin and Vilgax at Niagara Falls both them and Ben get sucked into a portal created by the Null Void projector. Only it’s not the Null Void they land. They land in a world where Superheroes are just a bunch of corporate puppets and think they can do whatever they want. But no it’s a real Hero’s Time.
Crossover - Ben 10 & Boys - Rated: M - English - Adventure - Chapters: 3 - Words: 22,563 - Reviews: 54 - Favs: 109 - Follows: 112 - Updated: 10/7 - Published: 9/3 - Ben T., Billy Butcher, Homelander/John, Hughie Campbell
Ben 10 RWBY Volume 2: Ultimate Omniverse by The Omni-Remnant reviews
Having returned from a massive adventure in the world of Remnant, Ben, Team RWBY, and the rest of their friends find themselves faced with new challenges at every turn on Earth. Be it villains old and new… or even things that they never imagined to be real. It's going to be a challenge unlike any they've seen before, but they're up for it. It's Hero Time! (Cover Art credit inside)
Crossover - Ben 10 & RWBY - Rated: T - English - Adventure/Romance - Chapters: 55 - Words: 755,304 - Reviews: 1017 - Favs: 465 - Follows: 438 - Updated: 10/7 - Published: 4/4/2021 - [Ben T., Yang X.L.] Gwen T., Ruby R.
Heroes Never Die It's Hero Time by Guardian-Sigil reviews
One would think that in a world where everyday people possess impossible abilities nothing would really be a surprise. Izuku Midoriya, who upon the age of four was diagnosed as quirkless, was denied of his dream of become a hero that can save everyone with a smile. But fate gives him a chance; allowing him access not to one but a universe of powers and abilities.
Crossover - Ben 10 & My Hero Academia/僕のヒーローアカデミア - Rated: T - English - Adventure/Sci-Fi - Chapters: 73 - Words: 1,504,533 - Reviews: 3773 - Favs: 1,704 - Follows: 1,706 - Updated: 10/7 - Published: 11/26/2019 - Kevin, Izuku M., Ochako U., 1-A Students
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: 58 - Words: 251,324 - Reviews: 26 - Favs: 43 - Follows: 34 - Updated: 10/7 - Published: 6/26/2018 - Lincoln L., Luna L., OC, Ronnie Anne S.
Tales from Avenging 10 by CaptainRex75 reviews
So many Heroes in one Universe. Too many to fit on one story. A series of One Shots involving Ben 10 as he teams up with different Character of the Marvel Universe to fight the forces or evil. (Co-Written by bcarandang1)
Crossover - Ben 10 & Avengers: Earth's Mightiest Heroes - Rated: T - English - Humor/Adventure - Chapters: 6 - Words: 42,148 - Reviews: 87 - Favs: 137 - Follows: 108 - Updated: 10/6 - Published: 7/15/2016
Planet Olympus by My Little Demigodly Brain reviews
When the worlds of Percy Jackson and Ben 10 collide, crazy stuff is bound to happen. Join Percy, Annabeth, Ben and Gwen on an incredible journey which might just question everything they've known till now.
Crossover - Percy Jackson and the Olympians & Ben 10 - Rated: T - English - Adventure/Mystery - Chapters: 2 - Words: 9,559 - Reviews: 7 - Favs: 16 - Follows: 22 - Updated: 10/5 - Published: 6/27/2021 - Percy J., Annabeth C., Ben T., Gwen T.
The Multiversal Oneshot Theatre by MiniTennyson reviews
A dedicated one shot story for each series for everyone to enjoy. Featuring characters from across all corners of fiction interacting with one another like never before. From Fanfiction AU Mergers to Crossovers, this promises to showcase oneshots from Ben 10 to Naruto, this promises to be an unforgettable experience. *Oneshot collection; also on AO3*
Crossover - Ben 10 & X-overs - Rated: T - English - Adventure/Fantasy - Chapters: 5 - Words: 6,480 - Reviews: 2 - Favs: 3 - Follows: 3 - Updated: 10/5 - Published: 9/21 - Ben T., OC
BEN 10: From Commonplace To The World's Strongest Hero by ALPHA02FURY97 reviews
Ben 10: From Commonplace to World's Strongest Hero. This is sequel to Ben 10: Irregular Omni Taken place right after Season 1 Episode 4 of Arifureta From Commonplace to World's Strongest.
Crossover - Ben 10 & Arifureta Shokugyou de Sekaisaikyou/ありふれた職業で世界最強 - Rated: M - English - Adventure/Sci-Fi - Chapters: 6 - Words: 12,399 - Reviews: 3 - Favs: 5 - Follows: 7 - Updated: 10/5 - Published: 9/22 - Ben T., Yue, H. Shea, S. Kaori - Complete
Yu-Gi-Oh GX: Omni Heroes by ppsspp reviews
Dual Academy have gotten a transfer student who is a top dualist from his academy. Since he is a transfer student he needs to start at the bottom and works his way to the top again. This right here is the story of Tyler Adams the Alien Dualist.
Crossover - Ben 10 & Yu-Gi-Oh GX - Rated: T - English - Adventure/Humor - Chapters: 1 - Words: 1,240 - Reviews: 1 - Favs: 5 - Follows: 3 - Published: 10/5 - OC, Jaden Y./Jūdai Y., Syrus T./Shō M., Ayukawa E./F. Fontaine
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