One common theme is adventure. Since the Pokemon games are all about exploring and battling, many fanfictions will have Hilda going on new adventures, perhaps in unexplored regions or facing new challenges. Another theme is friendship, as Hilda's relationships with her Pokemon and other characters are often explored in depth.
You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. These platforms have a wide variety of fan - created stories, including those about Hilda from Pokemon Black and White. Just use the search function and type in relevant keywords like 'Pokemon Black and White Hilda' to narrow down the results.
The theme of self - discovery is also quite common. As Hilda travels, she learns more about herself, her strengths, and her weaknesses. Also, the idea of battling and becoming a stronger trainer is often present. It's a fundamental part of the Pokemon world and fanfictions usually incorporate it into Hilda's story. For example, she might face a tough opponent and have to train hard to overcome them.
Obviously, Hilda is one of the main characters. Since she is the one being hypnotized, the story likely revolves around her experiences and how she copes with the situation.
One possible fanfiction could be about a trainer's encounter at the Route 4 hotel. Maybe the trainer discovers a rare Pokemon in the hotel garden. It could be a story of how they befriend this Pokemon and how it affects their journey in the Pokemon Black and White world.
The theme of friendship is also quite common. Hilbert and Hilda's relationship with each other and with their friends in the Pokemon world. It could be about how they support one another during tough battles or when facing difficult decisions. Also, the exploration of the Pokemon regions they travel through, like learning about the local cultures and legends related to Pokemon in those areas, is a popular theme.
One interesting fanfiction could be about Hilbert and Hilda's journey after becoming Pokemon Champions. They might explore new regions and encounter rare Pokemon. Another could focus on their friendship, like how they support each other during tough battles. There are also those that might create an alternate universe where they have different starting Pokemon but still go on an amazing adventure.
Friendship is also a big theme. Their relationship with each other and with other Pokemon trainers in the story. How they support each other during battles or difficult times. For example, they could team up to take on a powerful villain in the Pokemon universe. And of course, there could be themes related to the growth of their Pokemon teams. How they train and evolve their Pokemon to become stronger.
One common theme is their adventures in the Pokemon world. This could involve them exploring new regions, catching rare Pokemon, and facing tough trainers. Another theme is friendship, as they interact with other characters in the Pokemon universe and form bonds.
You can start by looking on fanfiction websites such as Archive of Our Own (AO3). It has a large collection of fanfictions, and you can search specifically for Pokemon Hilda fanfictions using the search bar. Just type in 'Pokemon Hilda' and you'll get a list of relevant stories.