onepiece

He transmigrated into One Piece… and stole Admiral Green Bull’s Devil Fruit in the Rocks era. Romu awakens the Wood-Wood Fruit—plants, thorns, instant regeneration and the terrifying ability to drain the life essence of the strong. He starts by crushing Golden Lion Shiki and taking his seat in the Rocks Pirates. When God Valley erupts—Garp, Roger, Sengoku, Zephyr unite to kill Rocks—Romu finally smiles… and summons “True Thousand Hands: Buddha of the Summit.” A kilometer-tall Buddha rises. Ten thousand palms blot out the sky. Romu reveals what “wood” really means: a divine Buddha that turns the battlefield into a temple of slaughter. Even Sengoku goes numb. Because the real monster of the era… was never Rocks.

'God told me I had five chances to be an overpowered being or just another nobody in MCU.' 'Thankfully I got the chance to be the former. Even though I had to train really hard for it.'

One day, I transmigrated into the world of One Piece. Kai became the son of Monkey D. Dragon, with a grandfather named Monkey D. Garp, and a goofy, airheaded younger brother named Luffy. Fortunately, the Ghost Back System activated! Ghost Back Completion: 10% — Training efficiency increased by 100 times! Ghost Back Completion: 20% — Training efficiency increased by 1,000 times! ... One day, when Kai’s Ghost Back had fully awakened, he appeared before Luffy, who was shouting about wanting to go to sea— and scared Luffy into tears on the spot. Luffy: “Pirates on the sea… are they all monsters like my brother? I don’t want to go to sea anymore!” Garp: “Dragon and Luffy, those two brats, with their scrawny arms and legs, I always suspected they weren’t my real son and grandson. Now Kai—he’s the one who truly looks like my grandson!” Sengoku: “The strongest creature on land, sea, and air is Kaido? No—it’s Kai!” Want additional chapter? https://www.patreon.com/ZeusOp

“He only wanted to survive. The sea decided he’d become a legend instead.” Arakaki Jin is a low-ranking marine in the East Blue with one simple goal: stay alive in a world ruled by Devil Fruits, warlords, and crazy pirates. But his terror of death keeps pushing his body and instincts past their limits—awakening sharp battle sense and Haki that turn sure defeats into shocking victories. Rumors begin to spread of a marine who survives every impossible mission, a ghost who walks out of battlefields soaked in smoke and seawater. Before Jin can slip back into obscurity, the name “White Ghost of the Seas” starts to follow him—whether he wants it or not.

An Uchiha in Konoha… with a pirate emperor’s power in his veins. In a village that fears the Uchiha, Uchiha Ren gains a mysterious System—and with it, the Whitebeard Template. No hand seals. No mercy. Just overwhelming power: Armament Haki, Conqueror’s Haki, and a will that crushes opponents before he even strikes. The elders want him controlled. The clan wants him claimed. But Ren only wants one thing—to rise to the top on his own terms.

Allen was accidentally sent to the One Punch Man world after being run over like a speed bump and ended up living next door to Saitama. In a world where monsters can wipe out cities, his first decision was simple: eat barbecue and calm down. Luckily, Allen awakened an infinite evolution ability. By copying and evolving everything he encounters, he quietly steps onto a path that is no longer human. While heroes fight in the spotlight, the real danger may be growing right next door. ........

Ru had suffered long and hard. A slave to the gods but would that hard past stop him? no, his chains were broken and so, he would never be bound by the gods again. But how? Why, by becoming a pirate in none other than the future pirate king's crew! (yes this is a strawhat crew fanfic. don't like, don't read)

The worlds were never meant to be stable. Aiden walks between fractured realities—not as a hero, not as a savior, but as something the system failed to erase. Where worlds correct themselves, he lingers. Where memories are optimized away, something remains. This is not a story about fighting fate. It is a story about what happens after the world decides it no longer needs you— and you still exist. Wanderer of the Fractured Seas follows a quiet journey through collapsing logic, missing presences, and systems that prefer silence over truth. Some delays were not supposed to exist. And some questions refuse to disappear.

Kaito was thrust into the world of Naruto. But just as he was about to die, he awakened the Rinnegan—and from that moment, crossed over into the One Piece world. There, he began absorbing and refining the power of reality itself—each breath pulling in the essence of truth. With no system to rely on, he forged his own path—surpassing conventional limits, using the lives of powerful beings as fuel. And then he finally fused twelve Devil Fruits into a single source of supreme might... ... (Kaito can absorb the power of devil fruit with his rinnegan)

"With the goal of hunting Celestial Dragons, using dual identities to rise through the ranks at Navy Headquarters, becoming the youngest Admiral in history!" "Sharingan + Ice Release + Devil Fruit - is this viable?" "Navy Admiral" "Lifelong Enemy of the Celestial Dragons" "Ancient Species - Snowfall White Wolf!" "The Navy's Most Handsome in 800 Years!" Borsalino: Compared to that kid, being called monsters makes us ashamed. Sakazuki: I can feel this guy's Burning Justice! Kuzan: My fighting style seems crude and clumsy compared to his... Sengoku: He will be the future of the Navy! A pillar of the Marine forces! (Most importantly, his face alone has boosted recruitment numbers by several points) Garp: I have a feeling... this guy will cause as much trouble as Roger...

Ryan crossed over and immediately encountered the great explosion on Punk Hazard. Fire and poisonous gas were everywhere; if he didn't run, he would surely die. Stumbling into an abandoned laboratory, he caught sight of a strange apple on the table, shimmering with an eerie glow. Without a second thought, he grabbed it and stuffed it into his mouth—it was the unfinished Artificial Dragon Fruit. At the brink of life and death, a strange power suddenly erupted. Ryan's body transformed abruptly into a small pink dragon, its scales gleaming with a translucent light amidst the flames. Stepping on rising Flame Clouds, he broke through the raging sea of fire and flew straight out of Punk Hazard. From that day on, the pirate world gained a unique traveler. Carrying this unstable Dragon Fruit, Ryan embarked on a journey entirely his own. PS: The MC has multiple relations with OP women.

When Marco from the One Piece world, carrying the secrets of the Three Types of Haki, is reborn in the Douluo Continent... When the top-tier Azure Flame Phoenix Spirit meets latent Observation, Armament, and Conqueror's Haki... When the limits of Spirit Rings are broken, when the definition of Spirit Abilities is rewritten! How will he, with the experience of two lifetimes, push flames and Haki to unprecedented heights? Azure flames burn out, the Conqueror descends!

Throughout his life on the Grand Line, there’s no doubt that Orin’s growth was extraordinary. But if we’re talking about the true turning point of fate, it all started with a single sentence he uttered as a child—when he risked his life to protect someone. “Kid, why do you insist on boarding our ship?” Roger glared across the vast blue sea, asking the brat standing before him. “Hahahahaha! Becoming a pirate is obviously so I can bring the world upside down with me!” After setting sail, Roger was surprised to discover… he had somehow taken in a little monster as a crew member. Strength far surpassing that of giants? Innate mastery of Observation Haki? And so, through a series of strange and chaotic landfall incidents, this kid revealed terrifying learning abilities, and quickly mastered marksmanship, swordsmanship—and eventually became the nightmare of Shanks and Buggy’s future! ... ... Check out my other fanfics as well, I have quite a few, some even better (in my opinion)!

Alternative Universe ........ with a lot of nonsense ideas. and mess up plot well I don't even know if this shit got plot. don't continue reading if you hated the first 2 chapters of the novel. and don't leave your own biased opinions. and i don't highly recommend this. this fan fiction it's just to pass some time... Well as usual The oc died got some power and he was reincarnated into this Croosover world with a lot of things that doesn't make sense. MHA will be the main World. and it's AU so expect some unexpected. well this ff is actually just a waste of time to read. don't bother.. just wanted to answer the what if — this is LN (￣ー￣) . . . . . . . . . One Piece was created by Eiichiro Oda, who began the series in 1997 and has since made it the best-selling manga in history. Naruto was authored by Masashi Kishimoto, who launched the ninja epic in 1999, focusing on themes of loneliness and perseverance. Bleach was created by Tite Kubo, who brought a stylish, supernatural edge to the magazine starting in 2001 with his story about Shinigami. Finally, My Hero Academia (MHA) was created by Kohei Horikoshi in 2014, blending traditional Japanese shonen tropes with his deep love for American superhero comics. . . . . . Maki is an OC who was a random guy. . . . . and the cover image ain't mine I found it on Google.

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.

During the Duel Academy’s scrimmage ceremony, Dark Dimon regains memories of his past life—and realizes he’s living inside a chaotic galgame world as its destined final boss: the Demon God of the Seven Deadly Sins. If pride, wrath, greed, lust, envy, gluttony, or sloth crosses the limit, he will awaken as a Great Demon God and be hunted by the entire world. His solution? Live a calm, desireless, “Buddhist-style” life. Avoid trouble. Avoid heroines. Avoid emotions. But in a world built to push him toward villainy, the more he seeks peace… the closer he drifts to becoming the Demon Lord.

Ron transmigrates into the world of One Piece and activates the Multiverse Tavern System. 【Ding! The system will invite the next four interdimensional guests based on the traits of your very first customer!】 Just as the system finishes speaking, Tea Dolphin, the Navy’s candidate for Admiral, pushes open the tavern door. 【Ding! After analysis, Tea Dolphin’s defining trait is: Bootlicker. Therefore, the next four interdimensional guests will also carry the Bootlicker trait!】 Ron: “System… you’ve got to be kidding me.” …… After the “Bootlicker-type” guests have visited the tavern, other interdimensional customers with traits such as Dominant Onee-san, Yandere, Resentful Spirit, Schemer, and so on begin appearing one after another. Kaido: “Teacher Kaido? Saitama is the real teacher! I’m going to do 200 push-ups and 200 sit-ups right now!” Rayleigh: “One sip of the Tenfold Vitality Brew… and this old man can finally lift his head high again at night!” Akainu: “Before the holy Keisha, I finally understand what absolute justice truly means.”

Transmigrated as an Uchiha. War is coming. Death is guaranteed. My cheat lets me draw abilities — but every pull gives me trash skills?! When useless techniques start breaking the rules… the strongest ninja is born.

A half-Uchiha, half-Senju ninja crosses worlds and awakens in One Piece. Picked up by Luffy on the sea train to Enies Lobby, he joins the Straw Hats and brings shinobi power onto the Grand Line. When forbidden eye techniques awaken at Marineford… the era of pirates begins to tremble.

Adam died on Earth and woke up in the Naruto world. He doesn't have a "System," but he has two powerful gifts: the Light-Light Fruit (giving him the speed of light) and a Mask that gives him the sword skills of Roronoa Zoro. In the Konoha Academy, Adam pretends to be just a weak, average student. Nobody notices him. But when he puts on the mask, he changes completely. He becomes a terrifying villain who follows no rules. He strikes with light speed and fights like a demon. He is so dangerous that even the Akatsuki are afraid to attack him. Madara warns his team: "Stay away from this 'Zoro.' He is too strong and will ruin our plans." Pain is shocked when he faces him: "I am the God of Pain... but you act like the God of Death."