When Leon Tennyson, a 15-year-old boy and his cousin Ben Tennyson, a 10-year-old boy, discovers two magical devices that can turn them into 10 different alien heroes, each with its own unique abilities. With this newfound power, Leon, Ben, Grandpa Max and their cousin Gwen help others and stop evildoers.

Story follows, Y/n Tenizawa the big brother of Ben, on his 15 birthday his grandmother Verdona gifts him a sacred gear - "MonstertriX" which allows him to transform into multiple mythical beasts, Y/n uses this power to fight criminals, villains, strays and aliens Dive in to find out as Y/n balances between supernatural and extraterrestrial Ranking: #1 in Ultimate - 26/01/26 #1 in Ben - 02/02/26 #1 in Kevin - 02/02/26 #1 in cartoonnetwork - 15/02/26 #1 in Insert - 17/02/26 #1 in Omnitrix - 18/02/26

Y/N L/N a boy adopted by the hyoudou family Y/N enjoyed his time with his new parents and tried to have a positive relationship with issei the only problem was Y/N was a lot more popular with girls and got better grades which made Miki and Gorou very proud and issei very bitter. one day his jealousy boiling over issei brought Y/N to a cliff area and shoved him over the side. Gorou and Miki were devastated when Issei told them that the two had gotten separated but after over hearing a conversation issei realized he had nothing to be jealous of and began to feel genuine regret. Y/N however had survived and thanks to the carnage symbiote was better then ever now with rage in his heart and later a new friend and partner in agony he's ready to return. can issei earn Y/N's forgiveness doubt it but will he end up getting cucked while trying more then likely.

A man who has lost everything. The people he loved, the comrades who fought alongside him-they're all gone. But now, he has a chance. A chance to meet a young boy. This boy still has a future, still has the people he cherishes. Those who came before him will do everything they can to support him. The journey of these two will create a date (war) like nothing you've ever seen. (This is my first story and english is not my first language, so expect some grammar errors, mistakes, cringes, etc.) Ben 10 belong to Man of Action Date A Live belong to Kōshi Tachibana

There exists another Ben Prime with another Omniverse. Separate from another Omniverse exists the Legendary Ben Tennyson who has gone through life battling aliens, demons and other beings with the device known as the Omnitrix. As a hero, he protects the universe from fiercest possible threats alongside a team of other heroes of various kinds.

Superman died a year ago and the world hasn't recovered yet. Sixteen year old Ben Tennyson is just trying to survive high school, keep his grumpy grandpa from worrying, and not fail history. What no one knows is that he possesses the most powerful alien artifact in the universe. In a small town between Metropolis and Gotham is Bellwood. Aliens are seen randomly trying to save people and fight bad guys. Lex Luthor works in the shadows to recreate the thing that took down Superman, Doomsday. Ben is pulled into an all out war meanwhile his best friend Tim Drake fights the same battle from the rooftops as Robin.

Dandadan x Ben 10 OC Basically a minor crossover of an OC in the world of Dandadan gaining the Omnitrix. Things are about to get weirder with even creepier NUTS!

Y/n L/n is an humanoid alien from the far regions of the galaxy as he serves as an officer of the galaxy called "The Galactic Rangers' on the planet of Gecarro. He is the most respectful officer who goes beyond to take down threats and save countless of planets and is treated gratefully by those around him. But something would change his life forever when he was assigned on a very important mission by his commander to hide 6 powerful stones call "The Infinity Stone" which each stones contains power like no other and if anything would fallen to the wrong hands, the universe will be doomed. With this responsibility he travel throughout space in hopes of hiding the Infinity stones but his mission falls apart when he's attack by pirates who seeks the Infinity stones. He soon lost control of his ship and made a crash landing on an back world planet known only as "Earth." Years gone by and soon Y/n is awaken and find himself on a planet that is filled as he discovers the existence of Superheros and supervillians. Now stranded with no ways getting back home, he must continue his duty protecting innocent people and fight evil. disbite being just an alien with no powers, Y/n will do whatever he can to not only defend Earth but also the universe from chaos and destruction.

Y/N L/N, the childhood best friend of Benjamin Kirby Tennyson, is going on a summer vacation with Ben, Ben's cousin Gwen, and everyone's favorite Grandpa Max. But unknown to Y/N and Ben was that their lives were going to get very interesting as two watches will soon be entering it. I don't own the Ben 10 series, I just own the story.

Ten-year-old Ben Tennyson and his best friend (Y/N) (L/N) discover two mysterious devices, the Omnitrix and Ultimatrix on their summer vacation. The devices allow them to transform into ten different alien forms replete with unique superpowers. While (Y/N) has the additional functionality to turn his aliens into their most powerful form, going from hero to Ultimate