One popular theme is romance. Given the relationship between Tsukune and the other characters in the Rosario Vampire world, it's common to see fanfictions exploring the romantic relationship between Tsukune and Tsurara. It could be about how they first fall in love or overcome obstacles in their relationship.
You can try looking on fanfiction websites like FanFiction.net or Archive of Our Own (AO3). These platforms have a large collection of fanfictions from various fandoms, including Rosario Vampire. Just use the search bar and type in 'Rosario Vampire Tsukune and Tsurara' to see the available stories.
One popular theme is the development of their relationship. Fans love to read about how Kurumu's initial infatuation with Tsukune grows into a deeper, more meaningful connection. Another theme is adventure. They often go on quests or face challenges together, like fighting against powerful enemies in the Rosario Vampire universe.
There are also fanfictions that focus on the backstories of Tsukune and Moka. Maybe exploring Moka's past as a vampire, her family history, and how Tsukune fits into all of that. Or looking at Tsukune's life before coming to the school and how it has influenced his relationship with Moka.
One common theme is the development of Tsukune's vampire powers. Writers often explore how he copes with his new abilities and how they change his relationships with the other characters.
First, know the characters well. Tsukune is a complex character with his own growth arc. Make sure to stay true to his personality. Also, understand the world of Rosario Vampire, like the different monster species and their cultures. Then, come up with an interesting plot. It could be a new adventure for Tsukune or a different take on his relationships.
Another theme might be his relationships. Maybe in these bashing fanfictions, his relationships with the female characters are misconstrued or made to seem one - sided in a negative way. For example, his bond with Moka could be portrayed as him being clingy or unworthy. Also, his attempts to fit into the monster school could be shown as him being incompetent rather than the plucky underdog he is in the original story.
One main theme could be power. With Tsukune as a god, power dynamics are likely to be a big focus. Another might be transformation, not just in terms of Tsukune's new status but also how it affects the other characters around him.
One great Rosario Vampire Tsurara fanfiction is 'Tsurara's Hidden Adventure'. It delves into a side of Tsurara that we don't often see in the original work. The author does an amazing job of portraying her emotions and her relationships with other characters in a new light.
Tsukune's vampire form in fanfiction can vary greatly. Some authors might focus on the emotional aspect of him dealing with this new side of himself. He could struggle with the urge to feed on blood, or he might embrace it as a part of his new identity. Additionally, his relationships with other characters, especially Moka, can be significantly affected by his vampire form.
Yes, there are likely some fanfictions out there with this concept. Fanfiction communities are vast and creative, so it's not uncommon to find crossovers like this. You can try searching on popular fanfiction websites like FanFiction.net or Archive of Our Own.