Ultimatealien Stories

Everyone's heard of the story and legend of Ben Tennyson and on how he saved the universe countless of times. But what if there was another? Another Hero. What if there...

Ben is driving a while after the final battle in Ultimate Alien and ends up in a portal to another world. Ben doesn't get the new Omnitrix due to Azimuth not finishing i...

After defeating Vilgax the Conquerer, Izuku Midoriya continues on his journey to master the secrets of the Omnitrix and become the next No.1 hero in the world. He'll hav...

Earth.. Water... Fire... Air... My grandmother used to tell me the tales of a long lost civilization from long ago, from before even the First Avatar, that existed witho...

Ben wasn't the only one who received a mysterious alien watch. A boy by the name Y/n L/n also had one we he found it while taking a late night walk in his hometown Bellw...

set 4 years after Gwen 10 classic. since the ending of Gwen 10 classic gwen has taken off the omnitrix, and has returned to a normal life. However when her grandpa max f...

[Ben 10 x Marvel x Nakano Quintuplets OC Crossover!] You may know Ben Tennyson aka Ben 10, right? The Omni Heroes of the multiverse, right? But what if Ben found his suc...

RJ Tennyson is the younger twin of Ben Tennyson and is the only cousin Gwen likes but that doesn't mean he doesn't get along with ben in fact bens really over protective...

A book of various one shots and scenarios involving Charmcaster from Ben 10 and the male reader.

Jaune Arc lost everything. Pyrrha his partner betrayed him, his family disowned him, most of his friends left him in the dust. Only after he disappears, do his former fr...

After a long first year of classes at UA, All Might has invited Deku and Uraraka to an early access event of the annual hero expo on I-Island where the latest in hero ge...

(Takes place in the Tv series) Whats better then a kid with the powers of a Spider? A kid with a watch that can transform into aliens that helps the kid with spider powe...

ITS HERO TIME.. or is it Deja Vu Time? After a tussle with the mysterious contestant of the Radiant War known as Shi Jian, aka the Time Traveler, Ben starts to suddenly...

Ben Tennyson famous superhero is thrown into a world full of assassin's and monsters. Seeing how corrupt this world is realizes that he can't be a hero anymore so he cas...

Ben Tennyson, after defeating the Daigon powered Vilgax, had been split in two. The second Ben had been sent to another universe, now having become part of Team Dai Gurr...

(A Loud house x Ben 10 Ultimate Alien crossover) Ben fights an unknown being who then causes a DNA rupture in the Ultimatrix, Sending a massive wave to transform half of...

the spies's world is gone, WOOHP is gone, their families are gone, Jerry's gone... and now they've been transported to an alternate universe. In which alien exist and on...

The story of a young man born quirkless in a world of heroes, who for all his life was told he could never becone a pro hero... but when he was fourteen years old he fou...

Alright Gals and Dudes heres the reboot of Izuku 10 which takes place...you know what I'm not doing this if you've watched the OG Ben 10 then I dont have to write this t...

[Male Reader] A teenager finds a watch that allows him to transform into powerful beings. Now, he finds himself in the midst of a group of superpowered teenagers fightin...