A Kamen Rider crossover that is also a rewrite of the 1998 animated movie. More info on the story, the Riders, and the Rudolph Characters in the first chapter.

Rick received a distress signal from a supposed old friend of his from another universe. At the behest of Morty, he complies and goes to his aid only to find that he had been murdered. Soon afterwards, Morty got kidnapped by Faust and operated on, enabling him to utilize the Build Driver and the Full Bottles to become Kamen Rider Build. A year passes as Morty comes across Ryuga...

When Harry picks up a black pass, he is brought into a adventure of time and strange creatures to help a young time traveler and a very unlucky boy. With creatures wanting to change the past, he will help fight against them and gain the courage to change his own future. HP/Den-O crossover.

UA University Student Kyoka Jiro's life changed one December night, when she met a man in armor on a motorcycle. (No Quirks, College IzuJirou AU based loosely on Kamen Rider Sangou/3.)

Ginny travels to another world and helps Sento to regain his lost memory and find a way home. But when she is suddenly involved with a war, Ginny must get help from a escaped prisoner and a strange girl with unique powers. HP/Build xover

Spike was telepoted to earth by a spell gone wrong. After 15 years his returned to find only 3 months have passed...oh and twilight crying. To say his not in a good mood is a under stament (re-uploded. Ex-aid spike x female thorax rating may change)

On the year that the Shroud of the Saint King was stolen, Jail Scaglietti began an experiment that would change the power balance of the entire dimensional sea. He gave birth to a hybrid between the Saint King and the Destroyer, one that could use the power of Evol-Driver and become the Kamen Rider.

In the year 2019, a young man gets the chance of a life-time to go on a special Fire Emblem event as advertised in Fire Emblem Heroes. He gets more than he bargained for... (120th story)

Within the darkest of nights, lies the brightest of stars. Two heroes fight together to break the chains of destiny in a battle of love and royalty, with the power of the moon and the darkness. "Kivat's ready to go!"

Gentaro Kisaragi never expected to have to transfer schools, and to an American school no less! Although Townsville High is certainly different, he will still try and make friends with everyone in this school, no matter what the hardship! But when Zodiarts start to appear, he will do whatever it takes to save his newfound friends! Look out Townsville, there's a new hero in town!

After being Ohma Zi-O, Tokiwa Sougo decided to reset the timeline to prevent the future that he will face but unfortunately Sougo being teleported to another world where girls being slaves by the infamous mercenary Black Dogs Does Sougo can fight them and save the world? [Open for Adaptation]

800 years had passed since the Greeed were sealed but now they are release upon the world. A young man has been chosen to became the new OOO to stop them, helping him in this battle are Shinobi or ninja, people who dedicate themselves to protect the world in the shadows, but not just any ninja they are beautiful and sexy young girls. (OC x harem)

Kamen Rider Zero One of Remnant! Enjoy! Not an update, this story is being abandoned and is up for Adoption. Message me if interested in adopting and if you want major plot points intended for the story.

It's safe to say that when he ordered that DX Amazon Driver off ebay, Bryce wasn't expecting to be thrown out of his home into another dimension, where clothing makes you stronger, and so does getting naked apparently. He also wasn't expecting to accidentally have amazon cells merge with his blood stream, but at least he still has that driver, so it's not all bad. Well, no, it is.

Dark Decade and the rest of Dark Riders have began their moves to conquer other universes. In this situation the new Decade has already chosen to travel to the 18 Rider's world. Will he defeat the Dark Decade and become The Savior? Or will he become the Destroyer to protect the multiverse? (OC x Yui Kotegawa)

One day when a group of friends get together to enjoy the newest Kamen Rider, someone knocks on the door and sends them to a new world. Now equipped with new powers it's up to them and their friends to protect their new home from a great evil.

after the end of the world (again), a small conversation about happiness, loneliness, heroes, and rabbits. [post-canon for both build and kirakira but set before the v-cinemas for build; written 9/10/20]

A world in the skies is collapsing. Warriors lost to different worlds. The only way to save it is with the aide of a warrior who has no home an no memories of his past.

A world shattered across the Axis of Time and ruled by a Tyrant and his unholy alliance, the Remnants of Gensokyo and many humans remain to fight and restore their world to normal after the loss of a friend. Kamen Riders, Witches, Youkais, Gods, Pirates, all shall unite to fight this evil when those that walk through time rejoin them. Can they win, even with this new chance?

When the world is being threatened by an evil force that people didn't know about, a young man known as Akira Nakamura and his friends set out on an unforgettable adventure to find this great evil and save the world from an age of fear and despair. But there will be a truth a boy must face with Akira's help. Will Akira be able to defeat this great evil? Or will he fail to do so?

It's weird that my neighbors were being louder than usual today. Then I spotted two strangers inside my home looking for this deck that landed in my room. I knew it was a bad idea to beat their asses with a chancla. But in my defense, they barged in!

During an invasion at the Kingdom of Talys, a battle with Marth led Nagato Nagasaki to break free from his brainwashing at the hands of Grashocker and remember how he was captured by them and his friend dying by their machinations. With revenge in his heart, Nagato joins Marth and his army in a quest to free Altea and destroy the organization that had made him the Shocker Rider.

when 7 kamen rider fell out of an ultra wormhole it is up to ash and his friends to help them not only send them back home. But also in helping them catch the group known as shocker who arrived in their world a week earlier without alerting arceus.

When it came to adventure, this poor half-baked student didn't expect it to come to him, of all people. Then again, maybe he shouldn't have become an intern for a company who weaponized belts and cards. Armed with the Glaive Buckle, Kaito will fight alongside the denizens of the Bionis to save and maybe even re-shape the world!

"According to this book, ordinary middle schooler Nakazawa Sougo is destined to become the demonic Ruler of Time: Oma Zi-O. In a world where a tragic fate has repeated itself, over and over again like clockwork, can such an unremarkable boy break the cycle of Hope and Despair, and bring about a brighter future? Well, I suppose you will have to read to find out, now won't you?"