What if Ben wasn't the only one with an Omnitrix? What if someone else had gotten one before Ben? This is the story where it happened, the individual who received the other Omnitrix having gotten it a year before Ben got his. Though the kid that wields this other Omnitrix wasn't exactly ordinary before he got it. What do I mean by that? Read and find out.

Ben was given the master control to defend earth from invasion, but Azmuth soon saw it was a losing battle. The omnitrix was sent to a separate dimension to keep it from the wrong hands. Now, Izuku Midoriya is the bearer of the watch with the master control still unlocked. Now he uses its powers to help as many people as he can but doesn't know of the main function, transformation.

Ben Tennyson is your average 15 year old, but what happens when he finds the strongest device in the universe. Will he be able to do what it takes to rise to the occasion as a hero or will he fail, before he can even begin

A chance of a vacation from his universal renown has landed Ben in the world of My Hero Academia and into a crash landing into Izuku Midoriya's life! What will this mean for Izuku's story? What will change? What will stay the same? There's only one way to find out!

It started when an alien device did what it did and stuck itself upon his wrist with secrets that it hid. Now he’s got super powers he’s no ordinary kid, He’s Hiccup!

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

A poor sap gets thrown into Warhammer 40k with the Omnitrix. In the Grim Dark of Warhammer, It's time for somebody to for a Hero to Rise.

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. Art by @gayartistsuzzan on Twitter!

Here we'll go into the short stories of Ben 10 meets DC Superhero Girls (mix of the 2 seasons and the movie)

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)

It started when an alien device did what it did. It stuck itself upon her wrist with secrets that it hid. now she's got superpowers, she's no ordinary girl, she's Amy 10. So if you see her, you might be in for a big surprise. she'll turn into an alien before your very eyes. She's slimy, cute, fast and strong, she's every shape and size, she's Amy 10.

Omniverse/Tamers; sequel to Heroes and Humanity. A little galvan named Albedo is back, and he has a couple of problems: Ben Tennyson is trying to kill him, no one will let him leave this silly planet to get away from him, and everyone in Japan is angry with him. Why did Fridge, Swamps and Hugh think moving him back to West Shinjuku was a good idea?

REVAMPED VERSON! An accident duplicates Benjamin Daniel Tennyson and jettison him into the Multiverse, ending up landing is world of spies! On top of that, the Omnitrix is rebooted, leaving him back with 10 aliens. But lucky for him, his new friends and sister is there to help him through all the challenges this world has to offer. It's hero time, spy style! Updates on Mondays.

It's been a couple of months since The Investigation Team solved the case and returned peace to their town of Inaba. Yukiko Amagi was looking forward to spending the upcoming summer with her friends, but it seemed that her parents had other plans for her, and it involved sending her to America for a Summer Road Trip with relatives she's just learned about.

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List of new episodes between canon and a few big differences(Invader Zim Irkenoutcast and Ben 10 Omniverse)

Time for a multiversal crossover dilemma. Familiar faces. New allies and foes. However, nothing is as it seems. For the hidden truths of this story will be unlike anything experienced before ... (Ben 10, Winx Club, Redakai, Star Wars TCW, Yu-Gi-Oh! DM, Danny Phantom, Sym Bionic Titan, Generator Rex, Xiaolin Showdown, Voltron, Spider-Man, ATLA, and more. UPDATED ALL PARTS ON 7/18/)

Big AU! Left naked and stranded after a bet gone wrong, Ben finds himself desperate for any form of clothing...even a loincloth? Little dose he know this loincloth will grant him a GRAND destiny and even greater trouble! Jungle Fury crossover!

Ben Tennyson and his friends are taking a vacation in the world of Pokemon where they meet Ash Ketchum and his friends. Little to them their enemies are working to rule their both worlds. AshxSerena.

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.

Rito Yuuki thought his life wouldn't get strange when he was ten and a comet came down to Earth on that starry Friday Night. But now, at the age of fifteen, and is known as the Galaxy's Greatest Hero. There's one minor problem, he can't confess to his childhood friend, Haruna. And to make matters worse, he somehow ends up engaged to the Princess of Deviluke. (Full Harem in Notes)

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*

Ben Tennyson witnessed his parents getting killed by the Empire of Britannia, causing a will for justice and heroism against the empire to be born. One day when he gains a device known as the Omnitrix that allows him to transform into alien beings...the dream of freedom and justice may just come true. But will his good intentions only do more harm than good...?

Gwen Stacy is chosen to become the successor of Ben Tennyson. Read and enjoy her origin as the heroine, G-Morph, and her ever-growing adventure with her arachnoid boyfriend. Mainly based on The Amazing Spider-Man movies and the MCU but has some original ideas. Peter and Gwen pairing. Inspired by The Incredible Muffin. Originally titled "Wristed Heroes"

When the hero of heroes is sent to the prime dimension via professor paradox for an adventure the war between deceptions and autobots gets spiced