This story was requested by Mace Sheperd. Vilgax kills everyone Ben loves, and Paradox ends up sending Ben to the world of One Piece! But that's not all! Paradox also gives Ben a little something that we all know as... The Biomnitrix! Now watch as Ben joins the Strawhat Crew as they take the seven seas by storm in their quest to help Monkey D. Luffy become king of the pirates! Please note that my knowledge on One Piece is very limited, so don't expect me to update very often.

Pairings include:

Ben T. X Nico Robin

Luffy X Boa Hancock

Sanji X Nami

Zolo X female Trafalgar law

Disclaimer: I don't own Ben 10, or One Piece!

Italics = Thinking

Italic Underlined = Songs and Flashbacks

Bold = Yelling

Bold Underlined = Alien Database

The Time Walker's Intervention!

Up at the top of the tallest building in Bellwood, there stood a boy with a broken look in his eyes. He looked to be about sixteen years old with shaggy brown hair, green eyes that had a dead look in them, and pale skin. He was wearing a black and green tee shirt that was torn and bloody, a pair of brown cargo pants that were in the same condition as his shirt, and no shoes. Clutched in his hand was a white and green hoodie with a green number ten on the chest. Like the rest of his clothes, the hoodie was torn to shreds and soaked with blood.

This is the world renowned hero, Ben Tennyson. But most people often refer to him as Ben 10 on account of him originally being able to transform into ten different aliens, and use their powers to fight evil. But today, things had gone horribly wrong.

One of Ben's old enemies by the name of Vilgax arrived on Earth earlier that day wanting to destroy Ben. However, he encountered resistance in the form of Ben's family and friends. The battle was long and gruesome, but...

***Flashback***

Ben had just arrived at the distress signal that he had received from his partner, Rook. As he dismounted his motorcycle dubbed the Tenn Speed, Ben surveyed the damage to the surrounding area. The fight must've been brutal. There was layers upon layers of broken concrete, destroyed buildings, and the scent of blood was everywhere!

"Man, I knew Vilgax was a maniac, but I didn't think he'd go this far..." Ben said to himself.

His Omnitrix started beeping as it detected the signal from Rook's Proto Tool. He looked in the direction that the Omnitrix was directing him to, and smirked.

"There they are! Probably still checking around for survivors." Ben said.

He ran off in the direction of the signal completely unaware of what he might find. He didn't have to run for long. When he got to the primary battlefield, Ben gasped in horror.

The bodies of his family and friends were scattered all around the place! Their bodies were still recognizable, but they had sustained serious damage. Blood and gore littered the entire area, and Ben could sense that there was only a single life left and that it was fading fast!

"Kevin...! Rook...! Grandpa...! Cooper...! Manny...! Helen...! Mom...! Dad...! Aunt Natalie...! Uncle Frank...! Julie...!"

Ben couldn't believe it. They were all dead! Some in more gruesome ways than others. Helen had been bisected at the waist, Manny had all four of his arms ripped off and a hole blasted through his skull, and Rook had been gutted like a fish with his own Proto Tool! Ben just stared horrified at the carnage before him.

"Ben..." called a weak voice.

Ben looked in the direction of the voice, and gasped at who it was.

"Gwen! Oh my god!" Ben cried in worry.

He ran over to his cousin, hoping that he could at least save her life. He cradled her head in his arms as he assessed the damage. She was covered from head to toe in her own blood, her hair was singed due to laser fire, her glasses lay shattered on the ground, and her right leg and left arm were bent at an unnatural angle.

Gwen groaned as she struggled to open her eyes, but she managed to force them open enough to see her cousin's face.

"Ben... Vilgax. He's..." Gwen struggled to say.

"Don't talk now, Gwen! You're gonna be alright! I'm gonna get you to a hospital, and they'll fix you right up! And-"

"Ben, listen to me...!" Gwen ordered, interrupting her frantic cousin.

Ben stopped talking. Gwen seemed to know something that he didn't, and she seemed to need to speak.

"I don't have much time left, Ben... Even with my Anodite heritage, I'm just... Prolonging the inevitable." Gwen said, coughing up a glob of blood. "It's Vilgax...! You can't beat him without the Ultimatrix! He's gotten too strong...!"

"What are you saying, Gwen?!" Ben asked. "You and I are a team!"

Ben paused for a moment to collect his thoughts. He knew that Gwen was going to die at any moment now, but he wanted to make sure she understood how he felt. That she remembered all of the wonderful memories they shared together.

"We took on enemies that most other Plumbers wouldn't even THINK of fighting! No one is stronger than us, Gwen! No one!" Ben said.

"Ben... Listen! I understand how you feel... But you have to know... When you're outmatched." Gwen choked out through her gasps.

Tears began to well up in Gwen's eyes, and she could feel Ben's own tears falling onto her face. She smiled sadly at her cousin.

"But... Even though I'm about to die... I'm glad... That the last thing I saw... Was... You..."

With a final breath and a sad smile on her face, Gwendolyn Tennyson closed her eyes for the final time in her life. Ben's eyes began to narrow dangerously. He gritted his teeth as tears of anger and sadness continued to fall from his face. Anger at Vilgax for destroying everyone that was important to him, and sadness that he didn't get here in time to prevent their deaths.

"GWEEEEEENNN!"Ben shouted to the heavens.

He broke down sobbing right there and then, not noticing a certain squid faced alien warlord heading right for him. At least... Not until it was too late.

***Flashback Over***

That was over a month ago. Ever since that fateful day, Ben had quit the hero gig in favor of mourning the loss of his friends and family. He didn't even seek medical help after barely surviving against Vilgax's surprise attack. Instead, he hauled the bodies of his dead friends and family, and gave them a proper burial. He dug their graves by hand, and did the same for their tombstones.

But right now, Ben couldn't take the pain and loneliness anymore. So he climbed up to the top of the tallest building in Bellwood with only one thing on his mind. Suicide.

He planned to jump off the thing so that he could die and be with his family. Something that he has so desperately wanted for the longest time. Ben looked down at the hoodie in his hand, and held it up as it billowed in the wind.

"A small memento for those who idolized the hero I once was..."

Ben let go of the hoodie and let it fly out into Bellwood on the wind currents. He watched as it flew out of sight, then faced the edge of the building. Ben started to walk to the edge, ready to take his own life. However, he was stopped by a hand being placed on his shoulder.

"I wouldn't do that if I were you, Benjamin." said a voice with an English accent.

Ben turned around to see none other than Professor Paradox standing behind him. The good professor was looking at Ben with a mixture of pity and sadness. But he also had this odd glint in his eyes that Ben wasn't so sure he liked.

"I heard about what happened, Ben. I'm sorry about what happened to them, but I've come with an offer for you." Paradox said.

"Offer...? What offer?" Ben asked.

Paradox grinned and snapped his fingers. With a flash of light, Ben felt something on his arms that wasn't there before. He looked down to see a pair of dark green gauntlets that had the same hourglass on them as his old Ultimatrix, but they lacked the dial. They covered half of his forearms, and radiated power.

"Those, my dear boy, are the Biomnitrix. It will allow you to turn into your old alien heroes, but if you cross them in front of you you'll end up transforming into a fusion of any two aliens that you select. I will send you to a different world where you can live out the rest of your life, but only if you wish to." Paradox explained.

Ben didn't even hesitate when he answered.

"Do it! I have nothing left here!" Ben said.

Paradox smirked, knowing that this would be Ben's answer. Using his time powers, Paradox opened up a portal that led to a different universe. Wordlessly, Ben stepped through the portal and didn't look back. Ladies and gentlemen, a new adventure for Ben 10 has just begun!

Well, there we go! I hope you guys like it! Until next chapter, read and review! Flamers will be roasted alive by Portgaz D. Ace!