Yes, there are quite a few. You can start by looking on fanfiction websites like Archive of Our Own. There, you might find stories that explore different aspects of their relationship, from friendship to something more. Some stories focus on their adventures together in the Puella Magi world, while others might delve into how they support each other through tough times.
A theme of conflict could be present. Maybe there are differences in their beliefs or goals that they need to overcome. Or perhaps there's an external threat that forces them to work together and in the process, their relationship evolves. Additionally, themes of sacrifice and loyalty might also be explored as they face various challenges in the fanfiction.
Archive of Our Own (AO3) is a great place to start. It has a large collection of fanfiction for various fandoms, including Puella Magi, and you're likely to find many sayaka x kyoko stories there. Fanfiction.net is also an option, although the interface might be a bit more dated.
I'm sorry, I don't have specific 'male kyoko x sayaka fanfiction' to recommend directly. You could try searching on some popular fanfiction websites like Archive of Our Own. They have a large collection of fanfictions, and you might be able to find what you're looking for by using the relevant tags and keywords in their search function.
One common theme is friendship. They start as comrades in the rather dark world of Madoka Magica, and many fanfictions explore how that friendship can develop into something deeper. Another theme is redemption. Both characters have their own flaws and past mistakes, and fanfictions often show them finding solace and growth in each other.
One good 'madoka magica kyoko x sayaka fanfiction' could be 'The Bond Beyond Wishes'. It delves deep into their relationship, showing how their different outlooks on life and magic start to blend and they grow closer. It's a really heartwarming read that captures the essence of their characters well.
One interesting plot twist could be that one of them is secretly working for an enemy all along. For example, Sayaka might be unknowingly influenced by a new witch to turn against Kyoko. Another is that they discover a hidden power within their bond that changes the whole dynamic of the story. Maybe it's a power that can rewrite the rules of the Madoka Magica world.
One popular theme is their friendship development. In many fanfictions, they start off as rivals or just acquaintances, but gradually come to understand and support each other. Another theme could be adventure. They might go on magical adventures together, fighting against new threats in the Madoka Magica universe. And of course, there are also fanfictions that explore their emotional bond, like how they deal with their past traumas together.
A fanfic might explore the relationship between Kyoko and Sayaka in terms of their emotional support for each other. Sayaka, after going through a lot of emotional turmoil due to her unrequited love and the harsh reality of being a magical girl, could find solace in Kyoko. Kyoko, who has her own set of traumas, might open up to Sayaka as well. They could have heart - to - heart conversations in a quiet corner of the city, away from the chaos of witch battles, and this could strengthen their bond.
An interesting idea could be a time - travel fanfic where Sayaka goes back in time and tries to prevent some of the tragedies that happened to them. She teams up with Kyoko in the past, and together they try to change the course of events. This would allow for a lot of character development as they interact with their past selves and try to make different choices.