Ultimatealien Stories

70 Stories

{On Hiatus} The Second Hero (Ben 10 x Male OC) by RENessence
{On Hiatus} The Second Hero (Ben 1...by Angelo Zero
A Ben 10 Fanfic of what would happen to the tale of Ben Tennyson if he were to have a best friend who also acquires a watch similar to the Omnitrix. This is a story of h...
Utterly Charmed : Charmcaster x Male Reader One Shots and Scenarios  by Beedrill2001
Utterly Charmed : Charmcaster x Ma...by Beedrill2001
A book of various one shots and scenarios involving Charmcaster from Ben 10 and the male reader.
Helping Gwen 10 by AnimeEagleScout
Helping Gwen 10by Joeseph Moore
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...
Aliens For Justice; Book 1: Ben 10 Returns  by AzielWrites04
Aliens For Justice; Book 1: Ben 10...by byrlentrock
After the aftermath of his last great battle- he had finally gotten rid of Vilgax, his greatest ever enemy for good, but at what cost? Since that day, Ben 10, the infamo...
(ON HOLD)It's Hero Time (Ben 10 Series X Male Reader) by Monster-Zer0
(ON HOLD)It's Hero Time (Ben 10 Se...by Monster-Zer0
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...
My Hero Omniverse - Vol 2 (2023 Reboot) by SuperScourge161
My Hero Omniverse - Vol 2 (2023 Re...by SuperScourge161
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...
The Legend of Ben 10: Book 1, Sentience. by Misaka_Omnitrix
The Legend of Ben 10: Book 1, Sent...by Mikoto Misaka
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 10 Radiant War, Vol.2 by Misaka_Omnitrix
Ben 10 Radiant War, Vol.2by Mikoto Misaka
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...
Gwen 10: Ultimate Alien Force by crystal_pro_2024
Gwen 10: Ultimate Alien Forceby crystalline productions 2024
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...
Loud House: Omni-Force by omegacrow-nexus
Loud House: Omni-Forceby omegacrow-nexus
(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...
Ben 10: Rise of A Hero by Fusionfalll
Ben 10: Rise of A Heroby Ben Tennyson
Ben Tennyson is in a world filled with superheros and it's up to him to save the day. Watch as he encounters psychic sisters, kung fu masters, cyborgs, and villains you...
Ben 10// The magical brother by MichaelCollins320
Ben 10// The magical brotherby Michael Collins
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...
Ben 10 x OC : The Ultimate Hero by JontoreanG
Ben 10 x OC : The Ultimate Heroby JontoreanG
"Never thought my life was going to get so strange, but one summer road trip with my Best Friend, His Cousin, and His Grandpa changed my life forever either good or...
Totally Spies Ultimate Alien Spy by humatrix-X-24
Totally Spies Ultimate Alien Spyby humatrix-X-24
After Ben Tennyson loses everything precious to him to Vilgax. Ben ends up being sent to the Totally Spies Universe. Where he ends up joining W.O.O.H.P. along with Sam...
Omni-Piece  by Fusionfalll
Omni-Piece by Ben Tennyson
Ben Tennyson is giving a chance to explore a whole new world filled with pirates, treasure, monstrous creatures, and so much more. Watch as he puts together the stronges...
Alien Hero of IS Academy (Male Reader X Infinite Stratos) by WLiquidGaming
Alien Hero of IS Academy (Male Rea...by WLiquid
Y/N L/N the World Famous Superhero who can transform into different Aliens is now transferring to Japan as the only male student in IS Academy. What will happen when he...
Akame Ga Kill's Ultimate Assassin  by KiritoBinns
Akame Ga Kill's Ultimate Assassin by 𝓜𝓸𝓵𝓵𝔂 𝓟𝓮𝓻𝓬
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...
Fairy x10  by Fusionfalll
Fairy x10 by Ben Tennyson
After recreating a universe, Ben is sent to another universe filled with Magic, Dragons, and Demons. Watch as he battles various mages, draons and insane black mages in...
Ultimate Gurren Lagann! Who the hell do you think I am?! by humatrix-X-24
Ultimate Gurren Lagann! Who the he...by humatrix-X-24
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...