onepiece

An ordinary guy from Earth is reborn in the world of One Piece with three advantages, one of them powerful enough to change history. The seas are brutal. The strong dominate, the weak get crushed, and true peace doesn’t exist. Ragnar quickly learns that surviving isn’t enough in a world ruled by pirates, Marines, and hidden powers pulling the strings from the shadows. He knows how the story is supposed to go. He knows the prophecy, the Pirate King, and the future awaiting this world. The question is, will he follow it? Will Ragnar chase the title of Pirate King, aim for something far bigger, or tear apart the path fate already decided? And if he changes too much… will the One Piece world remain the same? Note: Ragnar is a strong-to-stronger MC if that’s not for you, please don’t read. [Author’s Note: One Piece is owned by Eiichiro Oda. This is a fanfiction written by a fan, for fans.]

On his sixteenth birthday, Adam Varen got the Bazaar. A system that sells abilities, drops you into random worlds, and doesn't care if you come back. Everyone gets the same deal. But Adam has something nobody else does: he remembers his past life. Every anime. Every movie. Every world the Bazaar is about to throw him into. He knows how they end. He knows who dies and why. He knows exactly which powers to buy and which worlds to fear. The knowledge is an edge. It is not a guarantee. Because the worlds aren't stories anymore. They hit back. The people in them are real, and the plot doesn't wait for him to be ready. One wrong call and the Bazaar doesn't send a rescue team. It just stops paying out. Twenty-five years ago, something came through from the other side. It killed three hundred thousand people in a week. Humanity built academies, trained Explorers, and started fighting back. Adam is one of them — but he's playing a longer game than anyone knows. That part costs blood. Updates daily. No harem. Smart MC who bleeds. [Tags: Reincarnation, Multiverse, System, Progression Fantasy, Fanfiction, Solo Leveling-adjacent, No Harem, Smart MC, Dark]

Oliver Williams was walking calmly through the streets until he stepped wrong and fell into a dark abyss. A strange gacha appears in front of him. [Try your luck] [A free try for a new world] -- -- This story will follow the original manga line, so if you don't like it, do not read it. If you want, you can follow me or support me on Patreon, where there will be 4-5 additional chapters on top of the 4-5 that are uploaded weekly on Webnovel. patreon.com/Khaunique

After transmigrating into the world of One Piece, Kane becomes the orphaned son of a Marine Rear Admiral—and awakens the mysterious Scumbag Justice System. The rules are simple: Break naval regulations. Gain strength. At the elite Marine training camp, the system activates immediately. [Ding! Host reprimanded by Head Instructor Zephyr for an improper uniform at the opening ceremony. Disciplinary Violation +1!] [Ding! “Eyewitness Coefficient x5” triggered. Total Violation Value x5!] [Ding! Points credited. Available for physical enhancement and skill enlightenment.] Kane understands the loophole. The more outrageous the violation, the greater the reward. He sets his sights on a new goal: become the true king of the Navy. The atmosphere of the training camp shifts overnight. “Kuzan, justice isn’t learned in textbooks. Come see the real world.” [Ding! Abducting a future admiral and sneaking out after curfew. Violation +500!] [Ding! Subversion Coefficient x10 applied!] “Sakazuki, absolute justice means eliminating evil before it grows.” With a single strike, Kane executes a pirate in front of him. [Ding! Ideological subversion of a future admiral detected. Violation +5000!] [Ding! Subversion Coefficient x50. Massive reward granted!] Years later, Kane stands at the pinnacle of the Marines. Behind him are three admirals whose paths have been completely rewritten. Before him, a system interface filled with endless digits. “System,” he says calmly, “spin the Cosmic Wheel.” “Let’s see if today is the day I awaken Conqueror’s Haki.”

What happens when a child of the Senju bloodline is born with the power of the Magma, similar to Magma-Magma Fruit? That is the story of Shin Kagutsuchi. In the world of Naruto, where power is defined by dōjutsu, where the Sharingan, Byakugan, and Rinnegan reign supreme, he was born as an anomaly. Blessed with the vitality of the Senju and the destructive force of magma, Shin’s ability evolved in an entirely unknown direction.

Elric was just an ordinary guy—until fate threw him into the chaos of the Marvel Universe, right in the middle of war-torn Sokovia. In a world where the rich gain power through cutting-edge technology and the poor are left hoping for a lucky mutation, Elric had no advantages. No money. No powers. No way out. But everything changed one morning when he awoke in a mysterious white space—and met alternate versions of himself, each from a different world: Overlord, Naruto, One Piece, Solo Leveling, and more. Somehow, their souls were all fragments of the same origin—and they could share powers across realities. With their strength now flowing into him, Elric saw the path forward. After all, if no one else will save him... He’ll have to become the one who saves himself. [I will be using AI to enhance the story, but all the content is written by me] [In marvel it will slow development, with building his power slowly, and in other world he will mostly invincible]

Reborn amid the salt, blood, and storm of the Iron Islands, a foreign soul awakens inside the body of Euron “Crow’s Eye” Greyjoy, long before madness and ruin claim his name. This time, however, Euron is no mere reaver driven by cruelty and chaos. He carries with him the Pirate King System, an otherworldly power born of legend and conquest. With his left hand, he unleashes Conqueror’s Haki, a kingly will capable of crushing weaker minds, bending lords to their knees, and tearing apart the intricate political webs of Westeros. With his right hand, he commands the Mastery of the Seas, ruling waves, storms, and fleets as if the oceans themselves answer his call—turning naval warfare into absolute dominion. This Euron knows the future. He knows the betrayals, the deaths, and the fate awaiting House Greyjoy. And he refuses to let his family be consumed by tragedy once more. As the Ironborn rise under a banner of discipline instead of madness, their ancient creed—“What is dead may never die”—takes on terrifying new meaning. From the Iron Islands to King’s Landing, from frozen northern waters to burning southern seas, Westeros is forced to face a truth it has never known: A true Pirate King has arrived. Balancing ambition with loyalty, brutality with vision, Euron sails not just to conquer—but to rule. When the waves finally break against the shores of the Seven Kingdoms, only one question will remain: Will the Iron Throne bend… or be drowned beneath the tide?

Wesker. Stark. What kind of damn world is this? Catching up with the trend of time travel, Daniel couldn't help but shout out loud. [Raw: 美漫之手术果实]

Roy transmigrated into the world of One Piece and through twenty years of careful, quiet survival, finally clawed his way to the top. Marine Admiral. Glint-Glint Fruit. One of the most feared men on the seas. His only goal? Clock in. Drink tea. Slack off as much as humanly possible. It was going perfectly. Then, just as he settled in to enjoy the fruits of a lifetime of effort, a notification chimed in his mind. [Multiverse Chat Group activated.] Sasuke Uchiha has joined the group. Ai Haibara has joined the group. Tony Stark has joined the group. ... Roy stared at the flood of messages for a long time. "I finally make Admiral… and the cheat code shows up NOW?"

I am Blake, and I run a small stall in Foosha Village, working part-time as an interdimensional broker. One day, the Marine Hero, Garp, complained that I'm scammer and tried to flip over my stall. In retaliation, I threw him straight into an otherworldly dungeon! Ding! [Client Selected: Monkey D. Garp!] [Dungeon Generating… Dungeon World: Naruto!] [Mission Objective: Survive the Third Raikage’s assault, or defeat him!] Garp: "Stinking brat! What kind of ghost place did you send me to!" Blake: (Crossing my legs) "A one million Berry VR experience. It's a steal!" [Ding! Dungeon cleared! Clear Evaluation: S+!] [Congratulations, you obtained SSS-Rank Reward: Eight-Tails Perfect Jinchuriki!] [Congratulations, you obtained S-Rank Reward: Lightning Release Chakra Mode!] Feeling the lightning and Tailed Beast chakra surging through my body, I laughed aloud. Who should I toss in next? Whitebeard? Or perhaps the Five Elders? (Hold on, letting others fight to the death while I reap the rewards... isn't this system a little too awesome?!) --- [Note: This is an unofficial translation. All rights to the original work belong to its rightful owner.] > Patreon.com/NegativeTranslations

Before God Valley. Before the Pirate King. There was her. Zenka Jaygarcia, a Celestial Dragon born not into privilege, but into experimentation. Molded by the World Government, shattered by the Soul Edge, and resurrected again and again through defiance, she became their greatest weapon… and their deepest fear. Now, on the brink of chaos, the Five Elders unleash her upon the most dangerous threat in the New World: the Rocks Pirates. But Zenka has her own will. Her own blade. And her own agenda. From the gilded horror of Marijoa to the lawless madness of Hachinosu, follow the rise of a woman who cannot die, a miracle made of steel and blood. As kingdoms shake and monsters awaken, hidden enemies are lurking. Waiting for their chance.... more than 100 years! (not a reincarnated person!!)

Alvin transmigrates into the world of One Piece and awakens a ruthless Bounty Hunter System that grants him power for every pirate he kills . The higher the bounty, the greater the reward. While pirates chase money, power and freedom,Alvin hunts them without any mercy. Crews fall, world government suffers and the era of pirates begins to change cause of his slaughter. In this, even Luffy is just another target. Warning- As story develops, Mc gets more and more ruthless, viewers have been warned. ... https://discord.gg/ucXjauXacf

MC died after having sex with his yet to be mother-in-law. And as fate had it he was transmigrated into the world of one piece with The lust system. He planned to become royal and have harem. But fate had other plan. As he was send to the world he accidentally crushed the Wapol. And munch-munch devil fruit along with system energy got mixed with ship. The system was upgraded to 'The lust system version 2.0'. Now he was connected to ship. And lastly the goodness for his shake had slightly changed the world so that could collect his lust energy easily. What were the changes? Well... some characters become women. The women are perverts and male have very small sex drive. Now let's enjoy the adventure of the MC in the one piece world. [A/N: This work seems like the copy of the work. one piece : The ship of lust. And yes while writing I have copied some of the elements. It is easy to write in exciting ground work as I am new to writing. Well if I am writing the r-18 work then it is best to take some from my favourite work which had inspired me to write. But do not worry the work is totally diverted from chapter 15. There may be similarities because of system and because they are fanfic of same anime. But I assure it is totally different fanfriction and you will enjoy it.] Also please visit my patreon for advance chapters along with arts and picture collection in manga style.

On the Grand Line, power comes from Devil Fruits and Haki. But today, a different kind of terror washed ashore! A nameless drifter wakes up in a world ruled by pirates and Marines, carrying the bloodlust of another universe's greatest battle maniac: Zaraki Kenpachi. Whether they're awakened Devil Fruit users with world-ending powers or high-ranking Marine Admirals, everyone is another whetstone to sharpen his blade. In the Great Pirate Era, everyone is searching for a legendary treasure. He's searching the seas for an opponent who can make him feel the threat of death! "Enough talking." "Let's kill each other until one of us stops breathing!"

Cyrus wakes up in the brutal world of One Piece—and finds the legendary Mera Mera no Mi right in front of him. Eat it and gain unimaginable power… or leave it and die? He doesn't hesitate for a second. He devours the Logia fruit on the spot. With his new body now made of living flames, a mysterious data-like system panel activates, granting him stats, skills, and endless potential. Cyrus sets his sights on Shimotsuki Village, the legendary home of master swordsmen, to train under the finest sword instructor in east blue. There, he fuses the scorching might of the Flame-Flame Fruit with razor-sharp swordsmanship, forging an entirely new style: Fire style Swordsmanship—a blazing fusion of fire and steel that leaves nothing but ashes in its wake. A transmigrator armed with fire, sword, system, and sheer audacity—watch Cyrus burn his way across the Grand Line, rewriting what it means to be a swordsman… and maybe the entire pirate era along with it.

In a world where destiny weaves its intricate threads, Ross finds himself entangled in a web of fate beyond comprehension. Once a mafia enforcer in his past life, he meets his demise shielding his brother, the reigning mafia king, from a fatal betrayal. But as death claims him, another door opens. Transcending realms, Ross is reborn into the vibrant world of One Piece, armed with the memories of his former life and the knowledge of its canon. However, fate has a cunning twist in store. He awakens within the body of young Rosinante, a noble-hearted soul entwined in the dark machinations of piracy and government corruption. As Ross grapples with this new existence, a tragic turn of events leads to Rosinante's demise, allowing Ross's soul to seamlessly merge with his. Now, armed with his past experiences and the vessel of Rosinante, Ross embraces his chance at redemption and empowerment. Driven by a newfound purpose, Ross sets his sights on aiding his brother, the infamous Donquxote Doflamingo, in his quest to become the true ruler of the One Piece world. Amidst the turbulent seas and the clash of titanic powers, Ross navigates the treacherous waters of politics, betrayal, and warfare. Together with his brother Doffy, Ross/Rosinante must unravel the mysteries of the Grand Line, face off against formidable adversaries, and forge alliances that will shape the very fabric of the world. But as they ascend towards their ultimate goal, shadows from the past loom ominously, threatening to unravel everything he holds dear. In "One Piece : Brotherhood," embark on an epic journey where alliances are tested, loyalties are challenged, and destinies are rewritten. Will Ross help his brother carve his legacy into the annals of history, or will the specters of the past consume him whole? Or does Destiny have something entirely different in play for Ross that he might not even have imagined in his wildest dreams? *************************************************************************************************** Disclaimer: One Piece is a copyrighted work of Eiichiro Oda. This fanfiction is a creative work by Silent_stiele and is not officially affiliated with the One Piece franchise. For exclusive access to advance chapters and more, visit the author's Patreon page at https://www.patreon.com/Silent_stiele. Visit my Discord server for updates on the fanfic https://discord.gg/DecNeDpY

A boy from Earth was transmigrated into the world of Naruto, but his beginning was far from pleasant. The moment he woke up, he found himself as Shanks Uzumaki, a member of the Uzumaki clan fleeing from the destruction of Uzushiogakure. Right before his eyes, his father was killed, leaving him as the only capable fighter among the few surviving clan members. Standing before him were several masked ninja. Fortunately, he awakened a “Red-Haired Template System,” which not only helped him survive but also granted him the powerful template of the Red-Haired Emperor—Shanks from the One Piece world. Follow his journey as he uses the system to survive, grow stronger, and eventually form a powerful group of red-haired warriors, each wielding the abilities of iconic red-haired characters from across the anime multiverse.

A young man, a devoted fan of Gojo Satoru from Jujutsu Kaisen, finds himself transmigrated into the world of One Piece, assuming the name Gojo Satoru. By sheer luck, he consumes a Paramecia-type Devil Fruit—the Limitless-Limitless Fruit—and his adventure begins. At the start of his journey, he is familiar only with the major events of One Piece, having begun watching it from its later arcs due to its length and the fact that Oda, the creator of One Piece, once said that anyone can start watching the series from any point.(A/N: Wrong news boy.) Armed with knowledge of the later storylines, Gojo explores this vast world, discovering its surprises firsthand.

No system + Celestial Dragon + Sharingan + Mythical Zoan + Scholar + Roger Pirates ... Year 1 after joining the Roger Pirates Valthior: “Can you guys stop being so violent? I’m just a scholar—I can’t even tie up a chicken!” ... Year 5 after joining the Roger Pirates Valthior: “Hey, slow down with the killing! Leave one for me—I just learned a new move. I wanna split his damn head open!” ... Year 10 after joining the Roger Pirates Valthior: “Captain, why are you wasting time talking to him? I’m gonna chop him into a bloody mist!” ... After reaching Laugh Tale and uncovering the secrets of history Valthior: “This is just the end of the journey—not the peak! Why are we disbanding? I’m the most educated one on this ship, so listen to me—first we take down Shiki, then we smash Whitebeard! We’ve gotta truly live up to the name of Pirate King!” ... Twenty years later Valthior: “As the saying goes, the student surpasses the master. My captain became the Pirate King—so if I don’t become the King of the World, wouldn’t that make this life a waste?” ... Alternate name: One Piece: I Only Learned Killing Was Illegal

"At a high-level review meeting for the Naval Inspection Department, a stern official glares at the East Blue's newest inspector, Lancelot. ''Inspector Lancelot, explain this!'' the official demands. ''Why do seven different queens from kingdoms across the East Blue have children who bear a... striking, 70-to-80-percent resemblance to you?'' Lancelot, busy admiring a secretary, just yawns. ''Coincidence.'' ''Coincidence?!'' ''Absolutely,'' Lancelot says, pointing a thumb at the furious Fleet Admiral. ''I mean, I share a good 60-percent resemblance to Admiral Akainu. Does that mean he's my long-lost son?'' An explosion of magma vaporizes the corner of the table. ''I'VE HAD ENOUGH OF THIS PUNK!'' ''Ooh, scary~'' Kizaru drawls, holding him back. ''Just endure it a little longer, Sakazuki...'' ''You can't beat him, anyway,'' Aokiji mutters from under his sleep mask. ''Then explain this!'' the official snaps, moving on. ''Why do your East Blue marines receive salaries and benefits that rival Headquarters?'' Lancelot scoffs. ''With the original paltry pay, you could barely scrape by. Why would anyone choose this job over being, say, a pirate? I'm just making the job competitive!'' This is the story of Lancelot. After transmigrating into the body of a 3-meter-tall, famously weak, and cowardly Marine nepo baby, he decides to flip the script. Armed with a corrupt Vice Admiral father in Mariejois, two overpowered Systems, and a complete lack of shame, Lancelot's journey is just beginning. His plan? Con an OP swordswoman into joining him (and giving her a Zoan fruit), recruit a 12-million-Beri pirate as his enforcer, and fake being an 'Absolute Justice' psycho. Lancelot is out to build an empire, get filthy rich, and assemble a 'team' of the most beautiful women in the seas... all while pretending to be the most terrifyingly efficient Marine in the East Blue."