Ben 10: The World's Ultimate Alien Duo
  • Reads 75,882
  • Votes 1,575
  • Parts 28
  • Time 3h 39m
  • Reads 75,882
  • Votes 1,575
  • Parts 28
  • Time 3h 39m
Complete, First published Oct 17, 2023
Mature
(Ben 10 x OC! Zack Tennyson x CrossHarem!)

Summary: Following on the franchise about the kid hero Ben Tennyson, his twin Zack, his cousin Gwen, and Grandpa Max, as they travel the world during summer vacation. When Ben finds the Omnitrix and Zack finds the Ultimatrix, the mysterious watch that transforms them into 10 different aliens, a world of extraterrestrial superpowers opens up to them, changing their lives forever.

Disclaimer: I don't own anything in this story. They belong to their real respective owners. I only own my OC character. All characters are over 18 yrs old (with the exception of adults) and the girls will not get pregnant.

Rated M for Language and Sexual Content.
All Rights Reserved
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Hero Time (Composite Ben 10 reader x Multiple Crossovers) by Bill_s
11 parts Ongoing Mature
"In a world where Grimm, Danger Beasts, Monsters, and notorious villains run rampant, there are those who stand against them. Benders, Huntsmen, Heroes, people who have the power to fight them, for the sole purpose of defending the innocent. At least some of them. Other guys just want to prove how powerful they are, and push around people without powers. I learned that the hard way. My name is Y/n Tennyson. I'm 20 years old, and I am in possession of the most powerful alien weapons, in the universe. When I was little, people like Bakugo and Issei picked on me everyday, just because I was too powerless to do anything. So one day, I decided to drop out of Union Academy and went on a cross country road trip with my grandpa and cousin. Then on our first stop, I went out on a walk where a meteor fell out of the sky and crashed right in front of me. But, as it turns out, it wasn't a meteor, but a pod containing a watch that, once stuck upon your wrist, could turn you into any alien you want. Needless to say that my life went uphill from there. I traveled across the galaxy, saved it from blowing up. Fought a giant alien, AS a giant alien. Stopped a race from destroying the universe. Blew up my watch. Got a new one. Dated a tennis player, and broke up with her. Fought a giant alien, as a giant alien AGAIN, this time in Tokyo. Killed an interdimensional demon along with my archnemesis. And made friends with a Slimebiote named Skurd. Now me and my friends are unlicensed heroes who defend the world from destruction. Mainly because it's the right thing to do, but partially to show Union Academy what kind of hero I am now. And I can't wait to see the look on their faces." (None of the images, videos, or gifs in the book belong to me. I own none of the properties you will see in this fan fiction, they all belong to their respective owners. Any characters depicted in romantic or sexual context is 18 years old or older. You belong to yourself.)
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Hero Time for the Hero of Time

2 parts Ongoing

After defeating the demon, Majora, Link leaves Termina behind and prepares to start a new adventure with Epona in tow. Unfortunately, the Hero of Time finds himself whisked away to an alternate world that is far different from Hyrule and Termina in terms of appearance. There, he'll meet Ben Tennyson, a boy who can transform into different aliens using a device called the Omnitrix. Pairing: [Link x Gwen] Disclaimer: I do not own The Legend of Zelda or Ben 10. Both franchises are owned by their respective creators.