One great 'Kamen Rider Build' fanfiction story could be about an alternate universe where Build teams up with other Kamen Riders from different series to fight a common super - powerful enemy. This kind of crossover fanfic can be really exciting as it combines different powers and personalities.
The worlds could merge through a mysterious portal. This portal could be created by some powerful jutsu in Naruto's world that goes wrong or by an experiment in Build's world. Once the worlds start to merge, the characters would be in for a shock. The ninjas in Naruto's world would see the advanced technology of Build's world, and the people in Build's world would be amazed by the use of chakra.
Well, in a Naruto and Kamen Rider Build fanfiction, we could see a situation where the Kamen Rider Build's transformation devices are scattered across the Naruto world. Naruto and his friends go on a quest to find these devices. Along the way, they encounter different challenges and enemies. As they find the parts, they start to understand how Build's powers work. They might even accidentally trigger some transformations. And once they fully assemble the device, they have to decide who will use it to fight the upcoming big threat that is attracted by the presence of Build's technology in their world.
One idea could be that the Avengers are transported to the world of Kamen Rider Build. They team up with Build to fight a common enemy that has the power to disrupt both universes. For example, a villain who can manipulate matter like Build's powers but on a much larger scale, threatening Earth in the Avengers' world and Build's city in his world.
One interesting fanfic could be where the Kamen Riders from Build end up in the RWBY universe and team up with the huntsmen and huntresses to fight a common enemy. For example, they might face off against a Grimm that has been enhanced by some Evolt - like technology.
Often, they start off as strangers. For example, the Kamen Rider Build characters might accidentally end up in the RWBY world. They'd be confused at first, but then start to interact. Maybe the RWBY characters would be cautious at first, like Weiss might be skeptical of these new 'visitors' until she sees their combat abilities.
You can start by checking out some popular fanfiction websites like Archive of Our Own (AO3). It has a wide range of Kamen Rider Build fanfictions written by fans from all over the world. Another option could be FanFiction.net, which also has a significant collection of such works. Just search for 'Kamen Rider Build' on these platforms and you'll find a lot to choose from.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, including 'Kamen Rider Build'. There are different categories and tags that can help you find the type of fanfic you're interested in.
One idea could be an OC who is a scientist from a different dimension and has a unique build system. For example, instead of using bottles, they use crystals with special powers. Another idea is an OC who is a street racer by day and a Kamen Rider by night, with their racing skills incorporated into their fighting style as Build. Or perhaps an OC who is a young prodigy in the field of robotics and creates their own Kamen Rider Build - inspired suit with advanced robotic functions.
You can expect to see different interpretations of the characters. Writers might explore the backstories of the Kamen Riders in more depth or create new relationships between them. For example, they could develop a romantic subplot that wasn't in the original series.