Ben 10 & One Piece crossover!


Disclaimer:I do not own Ben 10 or One Piece. These amazing cartoon and anime belongs to their relevant owners i.e. Man of Action and Eiichiro Oda, blah blah blah.

You know the drill.


Chapter 01

Prologue!


Fleeting Dream!


Somewhere on an unknown and isolated island in the West Blue, there exists a small community named Bellwood. As small as the place was, there was still prosperity and peace, spared by the rampage of the nefarious bandits and despicable pirates. The reason was because the town could offer little for the inconvenience said deviants must go through to get to it. However, in one of the houses, the peace mattered little with the morning paper displaying what it had to offer the world. Another unreasonable incident from which details were censored, much like the missing century and many more unknown to the people.

How ironic it was.

Those who sought to learn about the history would be remembered by few existences.

"As I feared, they truly massacred the entire island." The man with brown hair sighed deeply. "Just what I had been afraid of. They must have somehow learnt of the archaeologists researching the void century. Now there's no Ohara proud archaeologists, no residents, no children, no history, they didn't even spare the ancient great Tree of Knowledge. They slaughtered everyone. Not a single survivor. Those heartless bastards didn't even spare the innocents who had no ties with the Poneglyph. It must have been terrible to them."

The blonde-haired woman placed her tea cup on the table and came around behind the man. Leaning forward, she hugged him from behind and exhaled deeply. "Carl, you know you couldn't have done anything for them." She muttered slowly. "It's not like you hadn't tried to warn them of the outcome for deciphering the Poneglyphs. I don't see anything that could have been done any different. There is always something that cannot be avoided... cannot be opposed... cannot be won against, and we must accept it. They knew, and yet they honoured their work and learnt more of the world history than anyone else, and that is because you never broke your promise. You never told anyone. We must be proud of them, just like they must have been of you."

"It says here that the Oharans were digging forbidden knowledge in order to destroy the world, and were therefore obliterated." Carl grunted, the distaste obvious in his voice. "I bet the World Government and Navy HQ made this up, so as to cover up their dirty action. I had warned Olvia to not pursue the Poneglyphs, but she was adamant, and now there is no Ohara anymore. Our homeland is completely wiped off the map, and no one gives a shit about it. I wonder if it had been worth it."

Sandra sighed and reluctantly broke her touch with her husband, when the adorable sound of a baby-cry reverberated throughout the house. "Let's leave Ohara behind us. It's been six years since we sailed off the island. It's time we move toward the future." She disappeared into the other room momentarily and returned with a new-born baby, who smiled innocently at the depressed man with a happy gleam in his bright emerald eyes. "After all, we now have a little son to look after, and I don't want anything but the best for him."

Carl nodded, inhaling deeply and plopping the newspaper on the table. "You and me both. Even though I was reluctant to leave the Tree of Knowledge and them, I still resented their daring. Why risk your lives for something that was buried centuries ago?" He sighed audibly. "I thought I was being rather selfish for abandoning them, and perhaps I was, but I wish they understood my reasoning." He said, rising to his feet and then approaching his little son. Having those little fingers grip his thumb tightly, the sensation was ecstatic and it flooded his heart. "At least, I don't have any regrets, not now anyway." He then leaned back and sighed. "I should be going, Sandra. It is getting pretty late. There is a trade I must look into."

The little boy could only smile at his father.


"Hey, are you alright? I… I read what happened to Ohara."

Carl smiled slightly and peered at his brother, Frank, casually putting the bills back on the desk. "I am fine. Thanks for asking though." He replied, feigning a little nonchalance. "I knew it would happen, sooner or later… about Ohara, I mean. It was just… too sudden, that's all. I suppose, I wasn't really prepared for it yet, like I thought."

Frank amended his spectacles and looked at the bills, a few unsanctioned and needed approval, still scattered on the desk. "Then, what are you worried about?"

"I am not… uh, I-I read about Robin, Olivia's daughter in the newspaper." Carl shook his head distressingly. "She has got some bounty on her head. She must have survived the attack, but to cover up everything, the World Government has accused her of sinking five marine warships, and so the seventy-nine million Berries bounty. Just more of their petty bullshits if you ask me, but this kind of bounty will attract dangerous people. She is just a little girl. Last I saw her, she was only two. I can't imagine how she must be hanging in there." He rubbed his forehead and then closed his eyes. "Sandra loved her like a daughter. I couldn't muster the strength to break it to her. Those government bastards must be really desperate to catch her. Perhaps, they don't intend to catch her, but end her life."

"Keep your head clear, Carl. No one except Harvey knows about your past archaeologist profession or your connection with Ohara. Don't speak about those things in public. You never know who might harbour ill will towards you in this world." Frank said, accentuating his every word. "I am sure if she fled Ohara, then she will be alright... somehow. I guess I am being too optimistic, but so are you." He assured his older brother. "By the way, Natalie told me that she and Gwen are going to visit Sandra and Ben later. They are probably gonna hang out, so would you like to join us in the bar?"

"Us?"

"Oh, just us friends. Rodge and the others." Frank shrugged his shoulders. "It's on Harvey though. I heard he has been stressed and wants to let out some steam." He chuckled mirthfully. "Anyway, you could enjoy a little distraction too, believe it or not. All these recent Ohara things are getting to you."

"What's wrong with him? I mean Harvey." Carl arched an eyebrow, smoothly switching the conversation. "Is it about his dad? Last I heard, the mayor was admitted to the hospital four days ago. He is alright, isn't he?"

"Nah, the mayor is alright. He is a tough guy for his age. Doc gave him clean chit a couple days ago, and the guy is already dealing with town troubles." Frank then smiled knowingly. "It's actually about Mrs. Levin. I think Harvey is rather interested in her – extremely so, and that gives him a scare."

"Oh?"

"Yeah, and Natalie thinks that Mrs. Levin likes him too, but Harvey is clueless about it all." Frank shrugged. "Women's intuition, I will never understand it." He and Carl shared a good-natured laugh. "But, yeah, that's what he is stressed about." He then inhaled deeply and plopped on a chair. "So, are you up for tonight?"

"I am not sure." Carl hesitated before continuing. "I am not sure how Sandra is holding up. We spend the better part of our life in Ohara. The losses, I just want to make sure that she is alright. I think she still believes that Robin died along with the others, since I didn't mention her specifically, and unless she reads the paper, she won't know."

"You know, that's what Natalie is there for?"

"I suppose."

Frank then looked meaningfully at Carl. "You know what, I am glad that you gave up on deciphering those Poneglyphs, and decided to leave Ohara behind."

"Me too."


Carl and Frank sauntered through the vacant street, heading towards the former's house near the outskirts, mildly drunk, but comfortably silent as they trudged to their destination. The day had been relatively ordinary, and hanging out with the townsfolk was an adequate, but pleasant experience. Shuttering from the slight chillness in the air, they quickened their pace and soon found themselves in front of the house. Carl turned the knob and with a little shove, opened the door. He entered, followed by Frank, who shut the door behind him. However, when their eyes adjusted to the sight, they froze in their tracks. Carl noted the familiar old man sitting on the chair, drinking tea. The man was donning a white shirt underneath the familiar red button-up Hawaiian shirt paired with brown pants and black shoes. A crimson coat with golden shoulder pads and golden trimming was draped upon him like cape.

"Dad?"

The old man chuckled apprehensively and rose from his seat. "Not the expressions I had anticipated, but it will do. Both of you sure have grown up since the last time I was here." He smiled genuinely. "I am delighted to see you two are doing alright. Congratulation, my sons, on becoming dads and making me grandpa. That is the best news I have heard in a while."

Carl was the first to overcome the initial shock. "Where were you all this time?" He then shook his head dismissively. "No, never mind that. Just tell me when you got here?" He then looked evocatively at the older man. "And, how did you even know that I live here?"

Max laughed. "Don't worry. No one knows I am here, Carl. I haven't been in the news since Roger's execution, and people care little about those whom they don't remember. Being a commoner has its perks. But the World Government is something else. I am sure they will eventually track me down, if I stayed in a place for too long." He then plopped back down on the chair, while Carl and Frank took a seat with their respective anxious wives. "Actually… I read about Ohara, so I got worried about you. I knew that Frank had settled here the last time I had visited. Luckily, I had been in the West Blue, so it didn't take long to get here. When I got here earlier, I found you two with the townsfolk." He said, peering at his sons. "Didn't take me long to find my way around here. I was surprised and really happy when I heard you both got married and I have become a grandpa. Time sure has flown."

Frank let out an amused chuckle. "You do know you risked a great deal to get on this island, don't you?" He then smiled. "By the way, their names are Benjamin and Gwendolyn." Max nodded slightly, sharing the laugh with his family. "So, you didn't answer the question. Where have you been all this time? Gold Roger was executed two years ago, and there has been no sign of you since. It's almost as if you vanished off the seas."

Max shook his head. "Just on the run from marines and keepin' tabs on the New World activities." He said, emphasizing more on the 'on the run' part. "And, his name wasn't Gold Roger. It was Gol D. Roger, the Pirate King."

"D.?" Carl gasped.

Max sighed deeply. "Yeah, he was some guy, and a very close friend of mine." He muttered. "Since his execution, the entire crew of the Roger Pirates has scattered and went their separate ways. The World Government had their hands full with the beginning of the Great Pirate Era and new pirates setting sail, so it was easier for me to slip through their grasps." He then rose from his seat and rubbed the back of his head sheepishly. "Anyway, I just came here to see you boys, and I am glad that you both are alright. It's a relief to know. I had been real worried since I read… never mind. I suppose, I was being paranoid. I should be leaving. If I set sail now, no one would know about me coming here."

"You are leaving already, Dad?" Carl interjected.

Max looked at his oldest son as he picked a dark cloak. "It's better for us all." He sighed apologetically. "Even if I want to settle down, the Navy HQ and the World Government won't grant me such luxury. I am too much of an outlaw for such a life. When I had set sail as a pirate all those years ago, I knew the life I was choosing." He inhaled deeply. "Then I spent my entire life fighting pirates and sailing and hiding my surname, so that you didn't have to suffer the consequences. I would rather not stay here, and jeopardize my years of effort with your life." He ambled toward the door and then stopped, smiling ruefully at his family, particularly at Carl. "I am glad that you didn't pursue what the Ohara's archaeologists did, Carl. But, I will tell you this much. Your son possesses what many don't. Even if you deny your inherited will, it's impossible to extinguish the flames. Someone else will carry the torch. I do not know what waits in store for my grandson…" He turned around opened the door. "…so, if it's possible, raise him to be a good man."

The entire Tennyson family watched the old man close the door behind him, and soon his fading footsteps became silent. The old man was gone, but his words still rung in the ears of those who could merely gawk at the door.


At three years, old, Ben was playing tag with the town's children in an open field around the outskirts of near the forest. The brown hair became unkempt, as he chased down the closest kid. He suddenly tripped and fell face-first into the dirt. Amused and entertained laughter reverberated as the other children surrounded him. He slowly pushed himself back on his feet, and wiped the dirt off his face, then his clothes and eventually his hands and knees, and immediately began pursuing the kids around hoping to tag them. Eventually, he gave up, collapsing on his back.

"Hey, Ben, are you gonna give up?" Ben stuck his tongue out at one of the boys with raven hair as he sat cross-legged.

"I am tired… and hungry. I don't wanna play anymore." He then rose to his feet and sauntered further towards the edge of the forest, sitting down on the rock grumpily. He glared at the raven-haired boy. That guy was only a year older than him, and such an... idiot? He vigorously shook his head and puffed up his cheeks, ignoring the kids making fun of him. 'Yup, Kevin is a baka. I am not talking to that baka ever again.'

The others resumed their play. It didn't take long for the little boy to find himself getting bored of watching the others play. Peering around, the forest piqued his attention, and he started sauntering idly towards the woods. Running his palms across some thick trees, he clicked his tongue as something stabbed his thumb.

"Ouch." He quickly retracted his hand and sucked the thumb, but didn't let the little pain hold back his exploring.

Ten minutes, eleven minutes, and soon it turned into half hour, and then an hour, and he couldn't help but marvel at the sights. The last hours of day was pursued by the fainting daylight and the little growl from his tummy reminded him that he was hungry, making him turned around to return back to his friends. But instead, he started trudging deeper into the woods, calling out for his parents and friend. He was lost.

"Mommy! Daddy! Baka Kevin!"

Another loud growl messed up his priorities and compelled him to look around for something to eat. His eyes drew to the tree garnished with red apples. The momentary smile on his face was replaced by sadness. He had no means to get his hand on one. The brunette grouchily plopped down on the ground. Hearing something impact with the ground, his eyes inadvertently drew to the apple that rolled up to him. He peered around for anyone who might have helped him, and his emerald eyes focused on something that fled into the woods. Quickly rising to his feet, he ran after the… something, only to return back to pick up the apple.

"I forgot this." Ben then once again ran into the direction in which that something fled. Eventually he found himself in a clearing where a young girl was sitting on a large rock and pitching smaller rocks into the river. He approached the raven-haired girl cautiously and stood behind her. "Um... who are you?"

The girl's neck snapped around as she jerked backward, falling on her bottom. Her blue eyes with big pupils were wide in shock as she stared at the little boy, startled. Gulping down the lump in her throat, she said slowly. "I am Robin."

Ben tilted his head to the side, and blinked at her. "Did you pluck this apple for me?" Robin nodded slowly, pushing herself back to her feet, prompting Ben to crane his neck upward to look at her. He then bowed slightly and smiled cheerfully. "Thank you." Robin acknowledged his words with another nod of her head and strolled towards the bank, sitting on the edge with her legs dipped in the water. The boy tailed her and sat beside her, his leg also dipped in the water, and began munching on the fruit. In between bites, he peered at the girl inquisitively. "Why are you here alone?"

"I could ask the same from you."

"Uh?"

Robin looked into the curious emerald orbs of the boy. "What are you doing here? Aren't you too young to roam in the forest alone?"

Ben laughed sheepishly. "I was playing tag with my friends, but they were too fast. So, I began tagging butterflies and then I couldn't tag a deer, but I tagged three more big trees, a big rock and sixteen beautiful flowers." He counted them on his fingers, as he listed everything. "Then I got lost... and I got hungry too, but I couldn't get the apple." He smiled. "How did you get lost?"

"I didn't."

"Uh?"

"I came here because I don't have anywhere else to go." Robin muttered, leaning back and placing her palms on the ground to support her, as she began kicking at the water. She noted that her new companion was mimicking her as he chewed the last bite. "Anyway, if you follow the river, you can return to town in ten minutes. Your parents must be really worried about you."

Ben tilted his head to look at his companion properly, and then smiled. "You are not going back?"

"No." Robin noted the brunet's frown from her peripheral vision. She turned around to get clear look and instead found him... disappointed? No, it was much too complicated for her immature brain to comprehend. He was looking at her with strange eyes that confounded her. She lacked words to express it, but she remembered that she had experienced it before. Her mom, her only friend, the other archaeologists; it was same as when she had looked into their eyes. Hesitantly, she asked. "What's wrong?"

"Why are you not going back?"

Robin blinked in astonishment, more perplexed than surprised. "Why do you want me to go back?"

"Cuz, I want to befriend you. Mommy says to be a good boy, and be friends with everyone." Ben said, laughing sheepishly. "I am friends with everyone, even with mommy and daddy, and baka Kevin, so I am a good boy. I promise I will be a good friend to you."

Robin looked away and wiped the stray tear that somehow found a way into her eyes. Standing up, she wiped the dust of her clothes and then peered at the brunet. "C'mon, I will drop you off at your house." Ben smiled and quickly got up. They began walking along the river bank. "So, who is Kevin, and why he is a baka?"

Ben laughed sheepishly. "Baka Kevin is my friend. He always bullies me, so he is a baka. But, he also helps me, so he is my friend, but he is still a baka." Robin giggled as Ben continued. "I have many friends, and I am a good boy too. So, would you be my friend too and play with me?" Robin nodded, resisting the urge to laugh, but that didn't stop Ben from smiling broadly. "Really?"

"Yeah. I would love to."

Ben beamed. "Woo-hoo, I made a new friend."

"But I still don't know your name."

The brunette turned red in embarrassment. "Uh, sorry. My name is Ben."

Robin giggled again. "So, tell me more about yourself?"


Carl entered the house and plopped down on the chair in the corner, as he rubbed his forehead. Surprisingly, Sandra didn't come out to greet him like usual, but he didn't let that bother him. Perhaps, she was busy. On the other hand, with Ben, nothing was ever certain. He was a troublemaker, but in a good kind of way. Exhaling loudly, he rose again and dragged his exhausted body to the kitchen where he found Sandra pacing around anxiously. Quirking an intrigued eyebrow, he let out an amused chuckle. "Something happened... again?"

Sandra sighed exasperatedly and peered at her husband. "It's Ben. Apparently, he disappeared again, but this time, he went right into the forest and probably got lost. Kevin and Harvey went to search for him, but they haven't returned yet. I swear, he is such a handful." She frowned at the nonchalance of Carl. "Don't go giving me that look. You know how troublesome he can be sometimes. I swear, I take my eyes off him for a second and he is gone outside with his friends, and he is lost again."

Carl laughed dismissively. "Don't worry. The woods are safer than you think. Kids usually get lost there, but they return." He then helped himself to some water to quench his thirst. "Either way, I should probably go and help Harvey search for him. That way we can find him more quickly. The situation is already much more terrible since those Vice-Admirals showed up earlier today." He muttered absentmindedly. "Why they would bother to travel all this way to West Blue is still a mystery to me. It's not like there has been any infamous pirates here."

"Do you think they know-"

"I don't think that is the case, Sandra." Carl interjected. "They don't seem to be here for us. They interrogated Morris and his family earlier and they are still under surveillance at the camp, or so the rumor goes. But it doesn't seem like they are here for them either. More like they are digging for information and it concerns them. I didn't go to see myself, but I had heard that both Akainu and Kizaru are here and the marines are scattered throughout the town. With the Vice Admirals are here, it is a little upsetting. The fact that a Vice Admiral shows up at all is more unnerving-"

"Mommy! Daddy!"

Sandra's face brightened when the voice of her son along with his fanatical knocking filled the house. She went to open the door and greeted her son, ushering him inside. "So, where have you been today, Ben? I let my eyes off you for an instant and you are gone. Do you know how upset everyone was? You always give mommy a scare with your antics. Uncle Harvey and Kevin had to go and search the entire town for you! It's already hard enough for them to climb up here."

Ben tilted his head to the side. "But, Uncle Harvey and baka Kevin didn't bring me here."

Sandra blinked in surprise, and peered outside to find no one there. She then shut the door and tailed the boy back into the kitchen. "So how did you get here?"

Carl interjected his wife. "Cut him some slack, Sandra. He is still a kid." He then ruffled Ben hair and chuckled at his indignant stare. "Someone else must have found him and brought him back. You know how friendly the townsfolk are. I wouldn't be surprised if someone else did it for us."

"Yup, my new friend brought me here.'" Ben smiled. "Her name is Robin."

Both Carl and Sandra froze in shock at the little revelation. Not frozen in ice or time, but as if their very heart had stopped beating momentarily from the blood abruptly turning cold. They shared a glance with each other that was meant for them to understand, and then looked at the oblivious Ben. Sandra was the one who broke the deafening silence that was literally suffocating them. "Ben, how do you know Robin?"

Ben blinked and smiled. "I met her in the forest. I was hungry, so she plucked me an apple, and then brought me here." He exclaimed. "She said she lives in forest, but she would be my new friend and play with me. She is very good and not like baka Kevin. We talked lots and she brought me here. I was a good boy and told her thank you."

"Where is she now?"

Ben peered at his father and replied. "She said she is going back to the forest."

Sandra gave Carl another meaningful glance and then smiled at Ben. "Sweetie, mommy and daddy have to go out and say thanks to your new friend. It was so nice of her to bring you home. We will be back soon. There are some bad people in the town, so promise me you will stay home until we return. If you do that, I promise to make you your favourite meal."

"I promise!"


"Vice-Admiral Akainu-sir! Emergency report from the duty patrol men, sir. Devil Child Nico Robin has been sighted in the town square."

The said admiral, fair-skinned, tall, muscular and intimidating man with short black hairs and brown emotionless eyes, peered at the lieutenant saluting him. Donning a marine cap under the hood of his coat, he turned around and sauntered toward the lieutenant. His height alone was redoubtable as he towered over the man. "I was informed that she ran away."

"Evidently she was seen along with a kid from town. The marine officer who had sighted her is pursuing her as we speak, sir. Perhaps the townsfolk have been sheltering her." The lieutenant shuddered from the reserved look that emerged on the officer-in-charge. "However, confirmations have yet to be made about her associates in the town."

"Ooh, so the townsfolk were hiding her, were they? This kind of behaviour is unacceptable. Ne, Akainu-san?" said slowly the other big-shot among the marines, Vice Admiral Kizaru, breathing out a ring of smoke from his cigarette. He shared similar physical characteristics to Akainu, and sported a dark hat with gloves, clad in grey pinstriped suit and tie, with the coat as his cape. He smiled rather laxly for someone being so important. "What should be done, Akainu-san? We cannot let the people's betrayal slide, ne? I suppose this is a very conflicting situation."

"Sir, should we report to headquarters?"

"Ooh, but that won't do, Lieutenant-san." Kizaru disputed, scratching his chin slothfully. "It would be right to report after we finish the mission, ne?"

Akainu scoffed. "Definitely." He peered at the lieutenant. "Let those civilians in custody go and instruct all the marines to retreat and report back at the camp within ten minutes. That is all the time for these people have left before I turn this land into their graveyard."

The lieutenant gulped the lump in his throat as he moved his head in the affirmative.


Oops, a cliffhanger!?

Ahem, I suppose this is the idea I had been thinking after toying with several possibilities. Eventually, I decided to stick with this one.

The both universes were merged with more and stronger adversaries in the world of One Piece, sailing the enormous sea. This prologue has mostly rotated around the Tennyson's and slight implications of their background was imparted, like their connection with Gol D. Roger, Ohara and the biggest of all… void century.

We even saw Maxwell Tennyson here. To be on a safe side, pay more attention to what he spoke. Although, most of it would sound insignificant at the moment, several clues were left within his dialogues.

Oh, and I have a small favor to ask. Max Tennyson is a swordsman here, probably among the most infamous ones who had ever sailed the seas. The thing is, like other One Piece characters, he too deserves a badass epithet. Any recommendation on that?

One more thing, Omnitrix won't be obtainable until far later, and Ben won't be eating any Devil Fruit. But, he will have a strong Haki, and will become a strong pirate. But, I was wondering about the kind of fighting style Ben should learn that doesn't just makes him too OP. Strong Haki with proper fighting techniques would level him close to the level of the Shichibukai when he would be only 20, and when he obtains Omnitrix, he might equal a Yonko. Well that was just a thought. I would appreciate some words here.

Also, if you guys have any suggestion for Ben's capabilities, and an epithet for him as well, then I am all ear.

Anyway, I suppose you guys enjoyed what you read. Don't forget to let me know what you honestly think of this. Be blunt about it, but no flames.

But first, a big shout-out to all my betas: 'The God's Eye' & 'Pure Red Crane'. This story is actually worth reading thanks to their keen eyes, which plucked out all the grammatical and typos errors.

See you guys on next update and until then, best wishes for the upcoming festive week.