Un joven Naruto es cuidado por Max Tennyson cuanto este viaja al mundo de Ben 10, pero todo cambiara en su vida cuando en unas vacaciones con los nietos de Max, se encuentran con un par de objetos extraterrestres de alta tecnología

Ben was honestly shocked when his mind was seemingly sent back in time. He was just getting used to the super-powered device known as the Omnitrix. With that fateful moment soon approaching, however, nothing could stop him from being the greatest hero ever!... Except the strange girl replacing his cousin.

When the Book of Ages is altered, Ben finds himself giving up the Omnitrix to make everything else go back to normal. Now, years later with a power of his own and new family, he finds himself thrust back into the events of that fateful Summer. The only thing is that he's surrounded by girls and one of them has the Omnitrix instead of him. At least Jade Chan's cute. Multicrossover.

Jake, a young hero who possesses the Omnitrix, an alien device that allows him to transform into various powerful beings, crash-lands on Earth and joins forces with the Teen Titans. Together, they face a new wave of alien threats and mysterious villains, learning the true power of teamwork and friendship. As Jake adapts to his new life with the Titans,

Kevin Levin has been missing for years, presumed dead. Ken Tennyson doesn't think so, and travels to Earth to look for clues. He stumbles across a large family, the only son of which has the peculiar ability to make his body take on the properties of any solid material he touches... (Adopted Lincoln AU) (Cover made by me with AI) (Cross-posted on AO3)

What would happen if Ben, Gwen, Kevin, Julie, and Ship ended up in the Prime universe? Let’s find out.

A new Fourze has arrived at the world of Ben 10 with a mission to be a new hero of the universe while befriending anyone he meets, what adventures will he do only time will tell now, Uchu Kita.

Our world is being invaded by beings called Venoms. Cities are crumbled to ruin, civilizations are nowhere to be found. But a hero of another world came to save the day, his name is Ben Tennyson. Ben teams up with Goku, Naruto Uzumaki and Monkey. D Luffy and others defeated the Venoms and they'll get everything back to normal. Welcome to Jump Force.

A twist of Fate, and Max's parents were taken away, No with no family he has been adopted by the Tennyson family. Max has his dinosaurs, but his big brother has his aliens. With his new family Max is about to set out to stop prehistoric and other worldly evil, and save his birth parents from their kidnappers.

Naruto and Will came to a different Earth to live out the lives they were given with a few surprises and meeting new people. But the one day Naruto found a watch that lets him turn into aliens and it kick-starts with him and others fighting aliens, criminals, and various other bad guys. A spin-off of Meridian Jinchuriki by pyrohelixdrago.

With the arrival of a young hero and his peculiar watch, the world of Remnant is faced with an unprecedented threat. Are the Grimm and their queen responsible for the impending destruction, or is something even more sinister lurking? For better or for worse, Ruby Rose will witness it all from the front row.

Class 1-A and a handful of teachers are whisked away to learn about the flaws of their hero society and beliefs in heroes in general. And so, two multiversal creatures show them the flaws of their hero society by learning proper hero lessons from the most unlikely place... A ten-year-old boy with a fancy watch on his wrist.

Austin has been ben's wing for being a hero, but then he sacrifice himself and now he is a world, filled with heroes and villans, how will Austin handle this? Austin harem with female Katsuki, izuku and shoto

Escaping out of Null Void, Kevin Levin hadn't thought to be embroiled into another world full of turmoil. Also why is Tennyson's cousin here? Stuck in a world full of capes, giant monsters who were invulnerable to anything, he does his best. Fight or die. He will do his best for sure. Warning: I own nothing, all belong to their respective creators. Rated M for a reason.

Izuku Midoriya, previously quirkless, was offered One For All by the greatest hero, but during training, he discovered the Omnitrix. Now his on the journey to be the greatest hero, the Symbol of Peace and The protector of Earth. It's Hero Time!

Right before the start of a new school year, Professor Ozpin meets a being even older and more powerful than himself. The enigmatic Time Walker seems determined to lend the Wizard his assistance, both with knowledge of events yet to come and the promise of a Hero who can turn the tide against the Enemy.

Stranded in an unknown world, Ben must fulfill his destiny here and change history for the better. Cover image from Promsien.

Sup, this is Cal. I'm your average Joe except that I died and didn't know till this guy call ROB told me. I can choose a new life to live in any universe. I figured, if I'm going to enjoy this, I better be a pretty powerful dude. But not too powerful, well maybe have a few perks. Look out world, a saiyan is here to be a true badass. (Based on a Ben 10 cyoa, more than 1 crossover)

Ochako Uraraka finds herself unexpectedly taking on the mantle of the Omnitrix wielder from Ben Tennyson. As Ochako begins to explore the capabilities of the Omnitrix, she must also navigate the complex relationships and alliances, all while facing off against increasingly powerful enemies. Cover by @ZebraKnight1 on Instagram

On a fateful day in the park, a young man's life is changed, when seeing a shooting star fall from the night sky. Watch Ube rise to be a hero, though it's kinda hard to be a hero when your mom is the police chief, and the avatar mistakes me for a spirit. Will Ube can save the world or will he fall? OC x Asami.

Ben Tennyson meets Ruby Rose during his summer break, and picks up both the Omnitrix and a thrill for action. Along the way, Ben discovers new alien forms, develops new techniques to use in battle, and a blossoming romance, while also forging close bonds with his new friends. But can he and his friends handle being thrust into a conflict between good and evil? (Cover by elmike)

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)

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.

[A Ben 10 X MHA Crossover Fanfiction] Our protagonist - The shapeshifting monster - Ben Tennyson is many things: a butler, a chef, a villain, a criminal, and even a vigilante. His actions blur the lines between good and evil, raising the question: is he a hero or a villain? Perhaps so often no one can really find out what's going on in his mind that defies definition.