There's also 'RWBY and Touhou: A Magical Encounter'. In this fanfiction, the magical elements of Touhou are blended really well with the world of RWBY. It shows how the RWBY characters react to the strange and powerful magic from the Touhou universe. It's a great read for those who like to see different fictional universes collide.
One great 'Dark Souls Touhou crossover fanfiction' is 'The Gensokyo of Lothric'. It combines the dark and challenging world of Dark Souls with the colorful and magical world of Touhou. The characters from both universes interact in really interesting ways, like Reimu facing off against some of the Dark Souls bosses. Another one is 'Touhou in the Abyss' which has a unique take on how the Touhou characters would fare in the abyss - like Marisa using her magic to navigate the dangerous terrains.
One popular 'touhou crossover fanfiction' is the one that crosses over with 'Pokemon'. It's really cool to see the characters from Touhou in the Pokemon world, with unique storylines like Reimu becoming a Pokemon trainer. Another great one is the crossover with 'Final Fantasy'. The magic systems of both get intertwined in interesting ways.
Another theme is cultural exchange. The RWBY world has its own set of values, cultures, and technologies, and Touhou has its own very distinct world of youkai and magic. Fanfictions often show how the characters from each world learn about and adapt to the other's culture. For example, a RWBY character might be fascinated by the way magic is used in Touhou. It can be really interesting to see how they incorporate elements of each other's worlds into their own understanding. And this can also lead to some character growth as they expand their perspectives.
Well, 'RWBY x Harry Potter: Magic and Dust' is also a very good one. In this fanfic, it imagines what would happen if the RWBY characters entered the wizarding world of Harry Potter. It's full of creative crossovers, like Ruby using her scythe in Hogwarts, and the story has a great plot that keeps you reading.
One great 'Bioshock and RWBY Crossover Fanfiction' is 'A New World'. It combines the unique aesthetics of RWBY with the dark and dystopian atmosphere of Bioshock. The characters from RWBY are thrown into the world of Bioshock and have to adapt to survive. Another one could be 'Merged Realms' which explores how the powers in RWBY would interact with the technology and threats in Bioshock.
One great Gohan RWBY crossover fanfiction is 'Gohan in Remnant' which has an interesting plot where Gohan's powers create unique situations in the RWBY universe. He interacts with the RWBY characters in a really engaging way, like when he teams up with Ruby to fight a powerful Grimm using his Ki attacks.
One great RWBY crossover fanfiction is 'RWBY x Avatar: The Last Airbender'. It combines the unique worlds of RWBY and Avatar in an exciting way. The characters from RWBY interact with the benders from Avatar, and there are epic battles and interesting storylines that focus on friendship and the fight against evil, without any inappropriate 'lemon' content.
There's also 'Sonic meets RWBY: A Chaotic Crossover'. In this one, Sonic's speed and abilities are pitted against the Grimm in a really exciting way. It delves into how Sonic's presence changes the dynamics in the RWBY universe. The author does a great job of integrating Sonic's world elements, like the Chaos Emeralds, into the RWBY story.
There's also 'RWBY in Bloodborne's World'. This fanfiction takes the RWBY characters and drops them into the terrifying and mysterious setting of Bloodborne. It's great for those who like to see how different characters adapt to a new and dangerous environment. It often has some intense fight scenes as the RWBY girls use their skills against the nightmarish creatures of Bloodborne.
One popular SCP RWBY crossover fanfiction is 'SCP - RWBY: A Cursed World'. It combines the dark and mysterious elements of the SCP universe with the colorful and action - packed world of RWBY in an interesting way. The characters from RWBY often find themselves in situations where they have to deal with the strange and dangerous anomalies from the SCP world, which makes for some exciting and unexpected plot twists.