Crossoverfanfic Stories

Buck has spent years letting the 118 believe he was just a guy with a messy past and a lot of odd jobs before becoming a firefighter. But the truth is bigger. Before the 118, Buck belonged to an elite SEAL team. The kind of team that became family. The kind of team that saw things they still do not talk about. Jay, TK, Steve, Hondo, Jason, and Buck survived ten years together. Then one final classified mission broke everything apart. Buck left that life behind and tried to become someone new. But when Jay Halstead shows up at Station 118, Buck realizes the past is not finished with him yet. And neither is Lena Carter - the woman who knew him before everyone else did.

After Sonic's latest adventure, Tom and Maddie decide to take him on vacation in Brooklyn where the blue blur befriends a plumber named Mario. While working underground to fix a water main and when Sonic goes to investigate where Eggman disappeared to, Sonic, Tails, Knuckles, Tom, Maddie, Mario and his little brother Luigi are transported down a mysterious pipe and wander into a magical new world. But when the brothers and Tom and Maddie are separated, Mario, Sonic, and their new friends embark on an epic quest to find Luigi and Maddie. With the assistance of Mushroom Kingdom resident Toad and some training from the strong-willed ruler of the Mushroom Kingdom, Princess Peach, Mario taps into his own power and Sonic learns new tricks with his powers, the origins of the Chaos Emeralds, the truth about his past, and how he ended up in Longclaw's care. Think you know the Blue Blur? Think again. (Sonic the Hedgehog and all characters related to Sonic the Hedgehog and it's movies are owned by SEGA and Paramount! NOT ME!!! Also Super Mario and all characters related to the Super Mario franchise and its movie belong to Nintendo and Illumination! The following is a non-profit fan based fanfic made for entertainment purposes only! Please go support each of the franchises official releases and their official material!)

A young girl who was killed by the almighty Truck-kun got reincarnated as her favorite character, Peko Pekoyama now as her she navigates Peko's life in her own way.

Hayley is the twelve-year-old sister of Dean and Sam Winchester. She has always been extremely close to both of her older brothers and they have both always been extremely protective of her too. Dean and Sam have been looking after Hayley since their dad John went missing a little over six months ago. It hasn't been easy but the three of them have managed so far. What happens though when the brothers make the tough decision to leave their baby sister with their paternal aunt after getting word from a friend of John's about his possible whereabouts leading them to wanting to try and find him? How will Hayley cope with being away from her big brothers and living in her aunt's world which involves a certain MC and all that comes with it? **READ TO FIND OUT WHAT HAPPENS*

Briarwood University. The shabby uneven red bricks, the weird classes, weird professors, and then there's the Fraternities and the Sororities. Everything is crazy and weird. (Contains OCs and Fandom Crossovers) The farther you indulge in the mysterious ways of Briarwood university, the more you'll wonder what will happen next.

(May contain swearing and mature violence. Mischaracterizations ahead!) The sudden supernatural phenomena dubbed "The great slip" occured, which change the whole reality forever. The Great Slip does not discriminate; Humans, animals, monsters, plants, dinosaurs, alien lifeforms -- anything that is alive can be taken, even the non living things such as objects, vehicles, buildings, even corpses, were all included. Some who Slipped are fortunate enough to return back to their home universe. Most do not. Some returned but different. Some sliped in different universes in different timelines, in different possibilities, alternate realities: A sky ruled by prehistoric predators, world war era battlefields, medieval periods, futuristic cities, empty worlds where civilization died long. And worse it includes the sudden appearence of machines -- may comes in different size, shapes, forms. They can change themselves if they wished too. They levitate, hover, or fly at impossible speeds, striking with mindblowing precision. Attacking any living things, destroying cities, shatter infrastructure, and erase civilizations. While leaving the plants untouched by them. These menaces are found in every universe touched by the great slip phenomena. They do not hunt food. They do not defend territory. They do not communicate. They simply kill what's alive and sentient Civilizations throughout different universes, of different timelines, learned how to fight back these beings, some named them, and the slipped ones learned to adapt. As anytime and anywhere, from the moment they blink, they found themselves in unfamiliar area. [SERIES TO CROSSOVER!!!] Arpeggio of blue steel Demon slayer Azurlane Invincible Lobotomy Kaisen

What if the bullied super heroine from Paris wins an essay competition for a free trip to Gotham city where she and her best friend are living to later in the year? What happens when Ladybug meets the anti-hero of Gotham. Feared crime, Lord Red Hood. Or when the hottest of gothams prince's saves her from her abusive class... What happens when she can't decide between the civilian Jason Todd, legally dead son of Bruce Wayne, and the rogue member of the bat family? Heyy!!! So, at the moment, the first few chapters of this book are being edited and extended, but you can read it whenever, vote, and comment!! Also, tell me if I mess shit up, I really appreciate it!!! See you in the book!! 20 CHAPTERS GUYS!!! second big milestone!!!

just a roast battle:)

When nineteen-year-old Sybil goes on another journey to Camelot with the Doctor, she uncovers a sinister plot to kill two birds with one bottle of potion: the king AND the Doctor. The plan almost goes accordingly when Queen Guinevere and the Doctor fall into a deep sleep. Immediately, Arthur, Merlin, and Billie recognize Morgana's handiwork. Question now is: What caused Morgana to wander away from the original legend and attack the Doctor? *discontinued*

☆~ !You have a new mail!... } open it pls! Loading... 10% ■□□□□□□□□□ 30% ■■■□□□□□□ 50% ■■■■■□□□□□ 100% ■■■■■■■■■■ 🌺🌸🌼... -,' successfully opened ~✨ ~~~~~~~~~~~~~~~~~~~ Note: thank you for those are reading this fanfic, it means the whole world to me! <3 !!! ☆~ ( Based on The Titan academy series and The Genshin Impact game.) *Spoilers ahead* The story: Ah... Class T1T5 and N4T1... there are numerous ways of describing then. From being a class mostly filled to the brim with idiots, who don't even know basic math. Students who often aren't academically intelligent, especially with exams or just normal school work. To a group of people that can actually pull off an excellent, well put out operation that almost costed their lives in the end. Both classes, Especially class T1T5, are unexpectedly the most popular class in Titan Academy, which is always known as one of the most prestigious schools in Singapore with it under the Organization's control. Throughout the history of these classes, some of them failed their leanings and in due course obviously, they are expelled from Titan Academy permanently, along with being blacklisted from all schools nationwide, explained by the Organization. So... what will happen if one of the lowest academic classes, T1T5 to be specific and then N4T1, were teleported to a recently popular rpg, turn-based game called 'Honkai: Star Rail'? And what will happen if the entire class would somehow to be on all paths and have all elements in the game? Will they survive? Or be killed by millions of different enemies and bosses? Who will they meet in their journey? What enemies they will fight against? How will they know who are their allies or not? There are so many questions to be answered... Found out in Honkai: Star Rail, A Trailblazing Journey!!!!!

When golden Flumpty tries to make a deal with white lily cookie, the souljam owner of freedom refuses, later he hunts down the others they teleported to another world and meet Charlie and itchy, they also meet a orphaned girl named Anne-Marie

Both Meliodas and Zeldris were sealed away by the Goddess race after loosing in the Holy War. After three thousand years the seal gotten weaker, allowing them to be free. After breaking free they realized the world around them has change and they must soon adapt to this new world and new people. I do not own Seven Deadly Sins, Highschool DxD, or any images I use in this story.

What happens when Jack Harkness and River Song go looking for The Doctor who is in Equestria? When The Master mysteriously gets pushed out of the Void? When the Fryes disappear of the face of the Earth and turn up in Equestria? Will everyone get back to where they're supposed to be? Read to find out!

'Another chance.' That's what Eren Jeager was thinking of when he was slowly loosing conscious after being killed for causing the rumbling. Someone heard him and gave him his second chance in Japan. Eren just wanted a normal life, but when his parents found out he has great acting skills, he left that normal life to one of acting. It was in the beginning of the acting life where he met her: Ai Hoshino, a girl who Eren knew was lying with her smile. I do not own Attack on Titan, Oshi No Ko, or any images I use in this story. Thank you to @ZenKali for giving me the idea of this story.

During the battle on Muzan, a portal appear and teleported Genya out of the battlefield to another place. In the new world, he has to attend U.A in class 1-B, meeting a lot of new friends and foes. I do not own Demon Slayer, My Hero Academia, or any images I use in this story.

What if one of the worlds Sora went to during the events of Kingdom Hearts 1 was Sandover Village? What if he traveled with Jak and Daxter through there journey to turn Daxter back to human? This fanfic explores a possible AU where Sora visited the world of Jak and Daxter.

Stupid idea, might delete/unpublish later if I don't like it. Cowardly! Childhood friend! Male Reader X Velvet Crowe I don't own any images, videos, or characters used in this story, they belong to their respective owners.

After the giant war, Percy wants to get away from the mythological life, and so do Sally and Paul. So what to they do? They move to Mako, Australia. Highest rank #1 in percyjackson #1 in h20 #1 in mermaid #1 in crossoverfanfic #1 in pjocrossover #1 in percyjacksoncrossover (Any feedback would be much appreciated)