One Piece and Ben 10
Crossovers
181
Omni-Piece » by The True Writer. Zerthin
A Ben 10/One Piece crossover; I woke up this morning with this on my mind, and I had to share it with you all! I hope you enjoy. It's going to be a task I hope you'll enjoy. [Bonus: Ben will have the Ultimatrix (Well an O.C version called the M-Model; He also has the Haki's; all three. but he'll have to get training to access them full time)]K, English, Adventure & Fantasy, chapters: 38, words: 61k+, favs: 201, follows: 188, updated: 9/26 published: 12/22/2019, Luffy, Zoro, Sanji, Ben T.
48 Luffy 10 » by leonardo18anime
The Life for the Straw Hats got even more weirder. After getting a new crewmember that is a literal skeleton they stopped at an island to rest, Luffy wanders off and sees a Star falling from the sky. The Star turned into a weird thing from space with a weird watch, the thing latches towards his arm and now Straw Hat Luffy is the wielder of a great weapon.T, English, Adventure & Sci-Fi, chapters: 4, words: 8k+, favs: 118, follows: 121, updated: 9/22 published: 8/6/2023, Luffy, Zoro, Kevin, Vilgax
Jen 10: Alien pirate » by Fishcake10
5 years after taking off the Omnitrix for good 17 year old Jen Tennyson is forced back into action by the disappearance of her Grandpa Max luckily she has some help from her new friends onboard the Going MerryT, English, Adventure & Friendship, chapters: 2, words: 5k+, favs: 12, follows: 13, updated: 8/16 published: 7/11, Ben T., Gwen T., Strawhat Pirates
28 10 Piece » by AutoHunterJ49
Many years ago, The princess of Alabasta made a chance discovery of a mysterious device that stuck itself upon her wrist with secrets that it hid. Unaware that this strange device had the capability to change everything not just for her kingdom but the whole world.T, English, Sci-Fi & Adventure, chapters: 3, words: 8k+, favs: 45, follows: 50, updated: 6/8 published: 3/30, Luffy, Vivi, Strawhat Pirates
15 Alien? Is that food? » by Wickerstein
No matter the timelines, no matter the universes, there's always a kid who manages to find an alien artifact of incredible power. Now if he could only figure out which alien tastes the best, then he'll be in business.T, English, Adventure & Sci-Fi, chapters: 3, words: 21k+, favs: 45, follows: 59, updated: 1/18 published: 10/26/2023, Luffy, Garp, Sabo, Prof. Paradox
239 Ten Piece » by Spartan of Chaos
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.T, English, Sci-Fi & Adventure, chapters: 25, words: 178k+, favs: 520, follows: 498, updated: 12/29/2023 published: 12/12/2016, Luffy, Zoro, Ben T., Vilgax
46 Omni Pirate of the Straw Hat Crew » by ReximusProductionsYT
Requested by Mace Shepard.T, English, Hurt/Comfort & Romance, chapters: 6, words: 7k+, favs: 86, follows: 85, updated: 2/21/2023 published: 5/31/2015, [Ben T., Robin]
57 Ben 10's Pirate Adventure » by Ciel Binns
Ben Tennyson is offered a chance to explore a new world, filled with pirates, treasure, monstrous creatures and so much more. Watch as he puts together the strongest pirate crew in history in order to become Pirate KingK+, English, Adventure & Friendship, chapters: 7, words: 81k+, favs: 109, follows: 111, updated: 8/28/2022 published: 4/16/2022, [Ben T., Nami, Robin] Luffy
11 Fleeting Dream! by Gr33dy-N1ghtmar3
A punishment deserves a just cause. But it lack thereof would cause unwarranted misfortune. A world where human and monsters reign together, the fight for supremacy would ensure chaos. What happens when it is fate weaving the future of torch bearers? Destined to shape of the next era, be it feud or treachery, if it fate that rolls the dice, then they are all pawns to be played.T, English, Adventure & Fantasy, words: 4k+, favs: 9, follows: 8, 8/26/2022, Ben T.
9 Ben10 in One Piece » by gaming power crusher
Ben10 in One PieceK+, English, Adventure, chapters: 3, words: 9k+, favs: 3, follows: 2, updated: 6/21/2022 published: 6/18/2022
83
Omni Force: WAR » by NegaiFreak
When one war ends, another begins. As the Marines suddenly start appearing in other universes, it's up to the Omni Force to put a stop to their plans, but tensions between allies start inner conflicts and lead to more bloodshed... What will come of this war for the Omni Force? MULTI-CROSSOVER STORY! FEATURING MULTIPLE PAIRINGS! RATED T FOR SAFETY! PLEASE READ, REVIEW, AND ENJOY!T, English, Friendship & Drama, chapters: 20, words: 231k+, favs: 65, follows: 48, updated: 5/12/2019 published: 2/12/2017, Akainu/Sakazuki, T. Law, Ben T., Rook
95 Ten Piece » by avatoa
Apologies to all the fans of this story, but it is now considered to be DISCONTINUED. I should have made the announcement long ago, but I didn't connect the dots until now. It has been reborn through Spartan of Chaos, so go check out his profile for further information.T, English, Adventure & Humor, chapters: 4, words: 50k+, favs: 143, follows: 116, updated: 4/30/2014 published: 12/27/2013, Luffy, Ben T.
46 Omni Piece » by HVulpes2.0
Instead of gaining a Devil Fruit, Luffy gains another power he has to learn how to us. The power of the Omnitrix!T, English, Adventure & Sci-Fi, chapters: 11, words: 39k+, favs: 108, follows: 80, updated: 9/15/2011 published: 4/29/2009, Luffy