Ben Tennyson and his team are in for the adventure of a lifetime when Professor Paradox sends them on a mission to aid the Straw Hat Pirates in finding the legendary treasure One Piece and help Monkey D. Luffy achieve his dream of becoming the Pirate King. But, old enemies plot their return.

Dropped in a random Galaxy, on a random Planet, with no memory of how he got there; sixteen year old Ben Tennyson is without his Omnitrix and stranded when he's taken under the tutelage of the former Jedi, Ahsoka Tano. After the recent execution of Order 66, they're both on the run from the Empire and Darth Vader himself. Can Ben train to defend himself without his watch?

It was a peaceful day in Bellwood and Ben is bored out of his mind, until a mysterious man arrives and sends him to another universe. Landing in the desert sands of Hueco Mundo, Ben meets the mysterious yet charismatic Aizen, who requests his help in a war in exchange for helping Ben get home. What's a hero to do?

Ben 10 has lost everything. Now he is given a second chance in a world full of superheroes. Will Ben decide to continue being a hero?

What happens when something different happens in the finale of Ben 10 season 2? Ben sacrifices himself to allow Gwen back into the real world, leaving himself trapped in the Null Void. After staying in there, an incident occurs that transports Ben into an alternate world. Alternate ending Ben! BenxWendy later introduced in the story. Edit: Now currently in a remaking cycle.

Ben is sent to the world of Earth's Mightiest Heroes! With political and cosmic danger on the rise, it's up to Ben and the Marvel heroes to set things straight. (Tying up loose plot holes. Connecting various other Marvel shows. Cover image from Promsien.)

After a few years of peacefulness Ben Tennyson engages his nemesis in another battle for the fate of the universe but their clash results in him ending up in a world where heroes and villains constantly battle and aliens aren't citizens on earth. Will Ben be able to change this new world for the better like he did on his earth or will this world's greater evils bring him down?

It has been two years since Brother Blood. Two years since the Titan's went their own ways. To learn, to train, to grow stronger. Now they return, stronger than ever, as their greatest challenges look just over the horizon. No longer Teens, they are the Titan's. And they will fight together, until the the end. James(OC)XHarem. NightwingXDuela. ChangelingXHarem. CyberianXSarah

Ben Tennyson never seem to run out of crazy adventures, but this has to be one of his craziest yet. When he is discovered by Night Raid, a group of assassins fighting for the Revolutionary Army, Ben must decide whether to join them or become a soldier for the corrupt Imperial Capital.

The second and final adoption of Damont Evermore. After the death of an old enemy Ben's world turns upside down, as he is faced with a decision he never thought her would have to make, and an entirely new world. Welcome Benjamin Tennyson the the Marvel Universe!

Ben Tennyson has found himself in another universe, one filled with magic he never imagined. He comes across a few wizards who invite him to their guild, Fairy Tail. With no immediate ways to return home Ben must adapt to this new world, form new bonds, and grow stronger with his teammates to overcome many obstacles. Adopted by pyrohelixdrago, post-Oracion Seis Arc and onward.

When Gwen returns for Christmas emotions run high and secrets are revealed. Will the two lovers be able to face the challenges and find happiness? This is a Ben X Gwen story

(DISCLAIMER: I don't own Ben10 or Rosario Vampire, just this story) Another year at Yokai Academy with everyone's favorite American hero and favorite monster harem! That means new aliens, new adventures and of course, new enemies. Even more, his newest (and only) monster transformation has a mind of its own! Can Ben survive another year, even with Gwen and Kevin backing him up?

(DISCLAIMER: I don't own either series, just this story.) Ben was a normal kid until he got a super-powered device known as the Omnitrix 5 years ago. Now he's going to a new school in Japan called Yokai Academy. What will he see there? Who will he meet? More importantly, just what was he getting himself into now? Eh... at least the girls are cute. (REMASTERED: 9/17/20)

(DISCLAIMER: I don't own Ben10 or Rosario Vampire, just this story. However, the idea was not my own. I've adopted the story from 1 of the original writers and he said it was ok) Ben Tennyson is called to the monster school known as Yokai Academy. What will he see there? Who will he meet? Even more pressing, just what was he getting himself into now?

Gwen has been kidnapped! With her life threatened and in possible danger, Eleven year old Ben and Lucy Mann (Omniverse) must rescue her before it's too late! Along the way, they'll face many trials, make new decisions, and change many fates. Air, Luna and Fall joins them in this new adventure, but Night Raid and the empire aren't far from taking interest in the two cousins.

Ben Tennyson has not lost everything he loves. In fact, things have been pretty sweet. But with an old enemy threatening a new reality. It's time for our favourite bearer of the Omnitrix to step in. Witness Ben as he makes his way around this new world, full of new heroes and villains. It's Hero Time everyone!

Corruption is said to be a monster that eats the soul of a man. So what if a hero with a pure heart decides to come to a world where the monster has almost taken over? Will he survive? Will he break? And will he get this dumb blond to stop calling him a cattle? Please read to find out. BenXAriaXSheele (Love Triangle). It used to include Leone.

The Sequel to GreyKing's Ben's Harem. Krystal Tennyson, the daughter of Ben Tennyson, is the current protector of Earth while her father looks for her lost brother. She must trust her lovers and her family as she grows as a hero and a person. OC/Harem

In this galaxy there are Humans, Galvan, Anodites, Kraaho, Nemuina and so many more! They travel space, intermingle and their tech evolves as they all work together!... and there are lot's of gorgeous girls out there. And these guys will review them all! Staring Ben, Rook and Kevin with lots of lovely ladies, as well as guest stars. May be a one shot, please show support for more

(OLD AND OUTDATED.)When Ben Tennyson visits Fuyuki on a trip for some Extra credits and some downtime, instead he finds himself locked into a bloody battle for a Wish-Granting Grail. With no other choice, Ben shall use the power of the Ultimatrix and newfound allies to put an end to the battle and uncover the truth of the Holy Grail War of Fuyuki.

The Universe works in very strange and mysterious ways. Sometimes, it seems as though two people were literally destined to meet one another... Follow Ben Tennyson on his journey to Honnuoji Academy as he makes friends, enemies, and battles sexy girls wearing Kamuis! Wait, what? (This story takes place after the end of Omniverse and before the events of Kill la Kill.)

After being informed of a danger to all sapient life in the galaxy, Professor Paradox and Azmuth grab a newly eighteen year old Ben Tennyson to save them all. How? By breeding with girls across the galaxy! Ben X Harem...expect lots of smut...

What if Gwen didn't interfere Charmcaster body-swap spell. How would Ben experience a new life, now that he's in Charmcaster's body with the power of magic and the Omnitrix.

A crossover of Ben 10 and Manyū Hiken-chō. This story was originally made by SaurusRock625. This is basically a continuation of the story. I don't own Ben 10 or Manyū Hiken-chō. And the first few chapter are all in his/her words. Harem Ben X Chifusa X Kaede X Kagefusa X Chichi X Oiso X Ouka.

Ben gets a new cousin. What happens next? BenXGwen

Ben wanted a brake from too much peace and quiet, while Louise wanted the most powerful familiar that she could get. Now Ben finds himself in a world that he doesn't know, one filled with magic like he never imagined. How will ben and Louise manage to stand each other all while having to deal with treats from magic and alien alike?

The Sequel to the hit story Ben's Harem by GreyKing46. For James Tennyson, son of the universal hero Ben 10, life hasn't been what most people would call normal. Even he does not even try and call it that. And his life is about to take another dip into the bizarre as he finds himself in a WORLD of heroes. Can he find his way home while also finding love? James(OC)/harem

After Julie breaks his heart Ben is meet by an alien Princess who calls him pharaoh. Events of his past are catching up to his present and will take Ben into a new adventure. BenXharem. Ben/harem. Ben x alien girls

After failing to stop the Anihilaarg from destroying the universe, Ben is given a second chance as he stumbles upon a world where people can bend the elements. Can Ben repair a world devastated by a century long war?

Ben Tennyson has lost everything. Now, in a new universe, he must decide: will he return to the role of a hero? Ben X Supergirl. Based off of sandman7734's story. APOPTED FROM THE INCREDIBLE MUFFIN.

Ben Tennyson finds himself in a world based on the science of Alchemy. He crosses paths with the Elric Brothers and decides to do what he can to help them get their bodies back and stop the Homunculi. However, little do our heroes know that an even worse enemy will soon rear its ugly head.

Ben thought his days as a hero were finally over before Paradox appears and sends him to a new world, hoping he could disrupt the plans of a certain snake before the world, and possibly time itself is destroyed, leaving only a world of death. (Sorry for crappy description, and this takes place during Continuum Shift(with a bit of Alter Memory thrown in), and ChronoPhantasma later)

Gwen's friend's last request is for Gwen to take care of her baby daughter, who has powerful latent magical abilities. Her parents and Kevin are against this idea, but Ben offers support. Can the two 18-year-old cousins raise - and protect - a little girl by themselves? And will this bring them closer to what is socially acceptable for cousins? BWEN

In Universe Vs Tennyson, Ben loses to the Galactic Gladiator, along with the right to stay in his universe. As penance, the galactic court banished the universe's best hero from the universe without giving the chance to say goodbye. Now stranded a world far more alien than his own, Ben must find his way in a strange new world. And uncover what it truly means to be a hero.

Ben/? AU. Everyone's life is a story unto themselves and we never tell the same story twice! In this tale Ben never received the omnitrixs, instead lived out his life as a normal teen, all the way to his 17th birthday. This will all change one chili dog filled Night. Follow the story as Ben deals with what goes bump in the night and the secrets those closes to him have been hiding.

When Ben and Gwen's parents go on a trip, they are left together to get to know each other better over the summer. What will happen when Ben ends up developing a crush on Gwen? Will Gwen be able to accept her cousin's romantic feelings for her? AU Ben 10. Also Bwen. NO LONGER CANON.

Ben finds himself in a strange lab and hears the sounds of a baby crying, being the hero he is he decided to save the child form her mother, the witch Medusa! Now Ben happily accepts his responsibilities as a Both a Hero and a Parent! How will Crona turn out having been raised by Ben Tennyson! Female Crona AU

A month after having beaten Vilgax and gotten the Utimatrix Ben's life is changed when his dad tells him they are adopting a girl form Overseas. Now Ben has to juggle being a Teenager, Being a superhero, with being a good big brother to his new little sister Chiyo. All the while dealing with life, his enemies, and the what ever else the universe has to throw at him!

After believed to be defeated foe return to exact revenge, Ben finds himself in Fiore. Just in time for the Grand Magic Games. BenXKagura pairing confirmed. Now in Return to Bellwood Arc.

Justice doesn't work. Justice doesn't avenge those innocent who suffer. I do. I don't serve Justice. I serve Vengeance.

Everyone who knows Akame ga kill knows the story. Normal country boy Tatsumi stumbles upon the cruel reality of the empire and decides to join Night Raid to get rid of the scums that runs it. But what if things were different? What if Tatsumi never got that chance? What if Sayo took his place with a certain hero with an alien watch? Will things still play the same way? (SAYOXBEN)

With a new generation of heroes just coming into their own, they are formed into a new team. With old friends and enemies alike showing up, will this new team rise to the occasion, or will The Light plunge the world into darkness? (Discontinued) ADOPTED BY CHIDORIPRIME. Will remain up, but still adopted.

Ben Tennyson has lost everything. Now, in a new universe, he must decide: will he return to the role of hero? BenXSupergirl Based off of sandman7734's story. Complete! Sequel is up! Important announcement at the end! (Discontinued) NOW ADOPTED BY CHIDORIPRIME. Disregard announcements, story will remain, but still adopted.

What if instead of Ben transforming into aliens while using their abilities, he uses magic and mana manipulation to fight with, join Ben, a powerful Magus and a scholar thief face the Justice League, the Team, the Light, and aliens while having fun at the same time

Many things can happen in the Ben 10 Universe, this is one of them. The question is: Can Ben love those who wronged him? Co-Written with GreyKing46. Ben X Harem.

Many things can happen in the Ben 10 Universe, this is one of them. The question is: Can Ben love an AI? Co-Written with GreyKing46. Ben X Harem. Omnitrix/Nemetrix/Ultimatrix/Biomnitrix

Ben x Female Ghostfreak. Use to be Co-written with GreyKing46. What would happen if Ghostfreak turned out to be a female when she was freed? A different life for Ben that's for sure. Takes place in the very first series. I don't own the image that inspired me to do this.

And there came a day unlike any other, when the heroes of the multi-verse found themselves untied against a common threat. On that day, they became the Avengers.

-DISCONTINUED!-ABANDONED!-NO MORE!-Post Ultimate Alien, Omniverse never happened/does not exist- It was only a matter of time before the rest of the world started listening to Will Harangue. The fiasco with the Esoterica was probably the last straw. But nobody expected the world to act like this.

We all know Mystique had two children in her life. Kurt, the son lost as an infant and Rogue, the adopted daughter. What if she had a third child? What if this one was thought dead by everyone, but had actually survived? Watch as a family is reunited, the waves it creates and as a small child regains the mother they lost.

This is where Gwen had gotten the Omnitrix and Ben became the magic user but when he discovers his power Ben is thrown into another world and lost for 6 years and upon his return the universe will meet the strongest wizard of all time. I know it sucky summary anyway Ben Harem story