Crossoverfanfiction Stories

After reincarnating into the world of One Piece, he becomes the secret second son of Gol D. Roger-the twin brother of Portgas D. Ace! No powerful Devil Fruit? He doesn't need one at all! Having a kryptonian body is more than enough to give this world a power shock after all...

Y/n came from the world where titans are the enemy of human kind, a younger sister to Levi and sadly, discovered as a traitor to humanity. Finishing her final battle, she fell into the river, wounded and confused to the point of dying. When she woke up, she was inside UA, facing the infamous class 1-A, and the next, she was suddenly part of that class?

Haku Yuki was supposed to die on a bridge. Instead he woke reborn into the Yukimura clan, heir to a quirk that lets him slip through mirrors and bend cold into blades. Bound by duty to an arranged alliance with Shoto Todoroki, Haku must learn to move like a weapon and think like a shield. At U.A. he trains under watchful teachers, weathers whispered rumors, and faces a world that prizes power over mercy. When the USJ attack shatters the classroom's safety, Haku's calm precision and Shoto's volatile strength collide with villainy and sacrifice. Between tea ceremonies at the estate and battles that demand everything, two heirs discover that protection can be taught, but courage must be chosen. Quiet, strategic, and dangerous in equal measure, Haku must decide whether to be the clan's perfect blade-or the kind of hero who refuses to vanish.

[This story is a full-on rewrite of the old "Wacky World" story from 2025] Two humans once explored an abandoned building and found a lone headset, once they put it on, they were transported into a colorful 90s-like video game world full of cartoonishly wacky characters: A ragdoll, a purple rabbit, a living chess piece, a comedy and tragedy mask held by a ribbon, and a mix-and-match toybox character, all headed by a ringmaster who's head is just a set of teeth and eyes and a sentient soap bubble. The two humans themselves were in new bodies, one was a jester-hedgehog avatar and the other was in a normal jester getup. Suddenly, they're are both hit with an unbelievable revelation... They can't leave the game. Sonic the Hedgehog © SEGA and Sonic Team The Amazing Digital Circus © Glitch Productions and Gooseworx

Follow a youth who reincarnates into Danmaci as a [Magic Meister]! Action! Adventure! Suspense! What more could you want?!

It is a normal-as-it-can-be day for April O'Neil and Casey Jones in the Big Apple. One day, two new students arrive at their high school, which sparks new adventures and mysteries for the Turtles to solve. HEADS UP!!! This was purely made for fun. There may be mistakes in the personalities of the characters (cause its been a while since I've watched the series or seen the characters in the game...) I hope you enjoy this "masterpiece" of mine :)

Yujiro in Poppy Playtime. What could possibly go wrong?

(Revised Version!) Kaneki Ken. Emmett Cullen. A half-ghoul with unresolved mental issues and PTSD. An animal-drinking vampire with a good-natured and a jokester personality. Two unlikely paths are crossed, emotions are confusing, relationships are complicated, and minds are inherently fragile. But Fate, or whatever one may call it, never lets their favorite play things alone for long. Clashing personalities with equally as complicated secrets are forced together, no matter the shockwaves brought about by it. You can't deny the pull of 'True Mates', after all.

At long last, All For One, Tomura Shigaraki, and the rest of the Paranormal Liberation Front have been defeated once and for all. As a result, a new era of peace begins as society heals and rebuilds following the aftermath of the Final War. Class 1-A moves up a grade as they continue their usual studies and training, as well as dealing with the lasting effects of the war... Or is it? Months later, new A class villain appeared, bitter and rejected researcher named Tsubasa is the mastermind of the organization that kidnaps five brilliant minds-David Shield, Melissa Shield, Nezu, Power Loader, and Mei Hatsume-to witness his life's work: the Quantum Resonance Interstate Conduit (QRIC), a machine designed to eliminate traffic problem by creating portals. When heroes close in, Tsubasa activates the machine prematurely, and it overloads, tearing open a doorway to another dimension. David and Melissa Shield are sucked through and vanish, leaving their world in shock and grief. The Shields land in the ruined world of the unknown and unfamiliar, a place without Quirks where monsters spontaneously transform from humans, animals, or objects, driven by corruption or obsession, and the Heroes that kill. How will they survive and how long will they be rescued in another world? (Sorry that I used AI for cover art, I lack of art skill.) (PS: This story will be updated previous chapters for better writing in case of change of mind.) Also, all the images i put are not mine, I respected the copyrights and this is just fanfic.

"History had already been written. She simply refused to accept the ending." Lothriel, the immortal daughter of Galadriel and Celeborn, has spent centuries haunted by visions of another world-a world of dragons, prophecy, and a family destined to destroy itself. When she arrives in Westeros during Laena Velaryon's funeral, everything changes. With Smaug at her side, she heals King Viserys, restoring his youth and giving him something he never thought possible: time. Time to unite his family, expose those who have manipulated his court, prepare Rhaenyra to become the queen she must be, and prevent the Dance of the Dragons before it can begin. But changing history is never simple. As Lothriel becomes Hand of the King, she must navigate a court that fears magic, an ancient conspiracy within the Citadel, and two Targaryen princes whose souls have been bound to hers long before either world existed. One kingdom. Two soulmates. And a future no longer written in fire and blood. ✨ Features: • Daughter of Galadriel & Celeborn • Lothriel × Aegon II × Daemon (Soulmate AU) • Smaug in Westeros 🐉 • Healed & Younger Viserys • Lothriel as Hand of the King • No Dance of the Dragons • Targaryen Family Healing • Father-Son Healing (Viserys & Aegon) • Daemon as a Father • Rhaenyra Character Growth • Alicent Healing Arc • Otto Hightower Gets Consequences • Ancient Elven Magic × Old Valyria • Political Intrigue • Romance • Family • Dragons • Magic • Major Canon Divergence / Alternate Universe

A lonely, outcast teenager due to his two tails, Tails is depressed. His life was later cut-off short due to the efforts of the main villain Dr. Eggman. However, instead of being in Heaven, he winds up in Hell. Having no idea where he was and having nowhere else to go, he accidentally bumps into Blitzo and Loona, thus leading him to stay and join I.M.P. (Tails is 18 years old)

Cheng Yiting and Cheng Meilin are sisters born into the Imperial Family of China, but they have grown up on different paths. Yiting, the older sister, is the Crown Imperial Princess and a renowned Azure Qilin cultivation prodigy in China. Meilin, secretly living in Paris as Marinette Dupain-Cheng, is the younger Imperial Princess, a Moon Hare prodigy, fashion designer, swordsmanship expert, and Guardian of the Miraculous. When Lila Rossi frames Marinette for cheating, theft, and pushing her down the stairs, the school believes the accusations and ultimately expels her without properly investigating the truth. Her parents, Sabine and Tom, refuse to accept the injustice. Then the Imperial Family arrives. Marinette's true identity as Cheng Meilin, Imperial Princess of China, is revealed-and standing beside her is her older sister, Cheng Yiting, the Crown Imperial Princess. With two prodigious sisters finally standing together, the people who condemned Marinette must face the consequences of believing a lie.

Charlotte Swan is the adopted daughter of Charlie Swan. They are as close as if they were father and daughter by blood. Charlotte adores her pops as she affectionately calls him and loves spending time with him whenever he's not busy at his job of chief of police in their small town of Forks, Washington. One day though, that all comes crashing down when Charlie discovers something about his adoption of Charlotte. This discovery ends up taking the two to the town of Charming, California. There, the two not only finally come face to face with the woman who had given birth to Charlotte all those years ago but they also learn a secret that could change their close relationship forever. What will happen to Charlotte and Charlie as well as their close relationship? Will Charlotte end up staying in Charming or will she end up going back to Forks with Charlie instead? **READ TO SEE WHAT HAPPENS!!**

Percy jackson felt adrenaline rush through her veins with every new discovery she made. Gods bless her soul. She was a... sea witch?????? / (marauders x female! percy jackson) /

What if Rimuru, Cid, Ainz, Subaru, Kumoko, and Ed were in My Hero Academia? What if they weren't OP? (but reasonably powered) This is kinda like Isekai Quartet on steroids. Don't worry, I wouldn't do this if I didn't think I could do a good job.

𝒕𝒉𝒆𝒓𝒆 𝒍𝒊𝒆 𝒉𝒆𝒓𝒐𝒆𝒔 ᵇᵒʸˣᵇᵒʸ ᵏᵃᵗˢᵘᵏᶦ ᵇᵃᵏᵘᵍᵒ ❝ "𝘒𝘢𝘮𝘪𝘯𝘢𝘳𝘪 𝘴𝘢𝘺𝘴 𝘵𝘩𝘦 𝘰𝘵𝘩𝘦𝘳𝘴 𝘢𝘳𝘦 𝘵𝘢𝘬𝘪𝘯𝘨 𝘣𝘦𝘵𝘴 𝘰𝘯 𝘺𝘰𝘶𝘳 𝘴𝘦𝘹𝘶𝘢𝘭𝘪𝘵𝘺." 𝘖𝘥𝘢 𝘪𝘯𝘧𝘰𝘳𝘮𝘦𝘥. "𝘈 𝘸𝘢𝘴𝘵𝘦 𝘰𝘧 𝘵𝘪𝘮𝘦 𝘢𝘯𝘥 𝘮𝘰𝘯𝘦𝘺." 𝘉𝘢𝘬𝘶𝘨𝘰 𝘳𝘦𝘴𝘱𝘰𝘯𝘥𝘦𝘥. "𝘛𝘩𝘦𝘺'𝘭𝘭 𝘢𝘭𝘭 𝘭𝘰𝘴𝘦. 𝘐 𝘴𝘢𝘪𝘥 𝘵𝘩𝘢𝘵 𝘐 𝘥𝘰𝘯'𝘵 𝘴𝘸𝘪𝘯𝘨 𝘢𝘯𝘥 𝘐 𝘮𝘦𝘢𝘯𝘵 𝘪𝘵. 𝘒𝘪𝘴𝘴𝘪𝘯𝘨 𝘺𝘰𝘶 𝘥𝘰𝘦𝘴𝘯'𝘵 𝘮𝘢𝘬𝘦 𝘮𝘦 𝘭𝘰𝘰𝘬 𝘢𝘵 𝘢𝘯𝘺 𝘰𝘧 𝘵𝘩𝘦𝘮 𝘥𝘪𝘧𝘧𝘦𝘳𝘦𝘯𝘵𝘭𝘺. 𝘛𝘩𝘦 𝘰𝘯𝘭𝘺 𝘱𝘦𝘳𝘴𝘰𝘯 𝘐'𝘮 𝘪𝘯𝘵𝘦𝘳𝘦𝘴𝘵𝘦𝘥 𝘪𝘯 𝘪𝘴 𝘺𝘰𝘶." ❞ -Odasaku Edogawa is the son of two of the most dangerous villains in known history. but no one knows that. no one is supposed to know that. because if someone finds out, his time at UA is cut short, and it's back to prison for him. he thought he had the whole thing well under wraps. until he's kidnapped by the league and All For One has to open his big mouth. now it's up to Oda to make sure Bakugo doesn't blab, or their time at UA is done for sure. 𝒊𝒏 𝒘𝒉𝒊𝒄𝒉 unlikely rivals fall in love. ... 𝐬𝐭𝐚𝐫𝐭𝐞𝐝: january 2025 ... 𝐩𝐮𝐛𝐥𝐢𝐬𝐡𝐞𝐝: december 2025 ... 𝐟𝐢𝐧𝐢𝐬𝐡𝐞𝐝:

A science-fantasy crossover, that asks "What If the World of Arknights met the 21st Century United States." Beneath the classified depths of Area 51, a decades-long black project known as Project ARKSEK has achieved what was once thought impossible: the creation of a stable, functional gateway to another world. In the wake of this discovery, the United States mobilizes its most advanced and sophisticated military units and scientific minds to establish the first Human presence beyond the Gate. However, this new world known as "Terra" by its inhabitants is no empty frontier. It is a world shaped by its own complex History, Societies, Nations, Geopolitics, and scarred by Catastrophes. Home to diverse nations built upon the foundation of Originium, an enigmatic energy rich mineral that fuels entire civilizations, but also spreads a deadly disease that has no cure, known as Oripathy. What begins as an exploration mission slowly becomes something far more what the US could have ever bargained for in another world. Fraught with discoveries and dangers unlike anything humanity has ever encountered before. As American forces attempt to understand and navigate this alien yet familiar landscape, they will be forced to confront questions of Morality, Control, Diplomacy and weighing the cost of Intervention. What they will find on the other side may change the future of both worlds. For better or for worse. Every discovery always has a cost. And some doors, once opened, cannot be closed. For fans of speculative fiction. This work is fanmade fanfic passion project inspired by the world of Arknights, owned by Hypergryph and Yostar. All rights to the original story, characters, and intellectual property belong solely to their respective owners. I make no claim of ownership over any part of the Arknights universe. This project is created out of curiosity and admiration for the source material and is intended for fan speculation, appreciation, and entertainment purposes.

What if the strongest human ever ended up in the world of Re:Zero? Before Garou's radiation poisoning kills King, an unknown force transports him to another world. The strongest man encounters new adventures on his very first day, and everyone watches how easily he saves people and defeats the greatest evils time after time. No one even suspects that King is just an ordinary man. Overall, almost nothing changes in King's life. Or does it? (English is not my native language; Previously, the fanfic was published on Ao3.)

After their latest adventure, Sonic, Tails, and Knuckles move to Metropolis when Tom takes a new job with the local police. But adjusting to city life isn't easy-especially when Sonic still struggles with teamwork. Their arrival leads them to a group of young heroes, forging new friendships and alliances.

Five years Damian waited for the last Miraculous Ladybug manga, and the ending sucks. Enraged, he boasted he could write a better story. A mischievous, fourth-dimensional imp quickly appears and gives him a chance to prove his claim. To prevent a disappointing ending, he must change the plot as he sees fit. What would a genius detective, Robin, do in the MLB Universe, to cause Chaos of course! And He has a task to fulfill, a mission to accomplish: prevent the Love-Square from forming. Be the home-wrecker and steal Marinette from Adrien. Is he going to do it? For the sake of the mission? We'll see.