Perhaps in this fanfiction, the Pokemon gyms are run like the Sohma family houses in Fruits Basket. Each gym leader has a secret related to a Pokemon that is similar to the curse in Fruits Basket. The main character, a young trainer, stumbles upon these secrets while trying to earn gym badges.
One idea could be exploring the backstories of the minor characters in more depth. For example, what was Hanajima's life like before she met Tohru? Another could be a 'what if' scenario, like what if Kyo had been accepted by his family from the start. Maybe a time - travel fanfiction where Tohru goes back in time to change some of the sad events in the Sohma family's past.
In such a fanfiction, the relationships in 'Fruits Basket' could be mirrored in Pokemon relationships. The deep friendships and rivalries in Pokemon could be explored in a more 'Fruits Basket' - like way. For instance, the relationship between Ash and Gary could be developed to have the same kind of complex feelings as some of the characters in 'Fruits Basket', with a mix of envy, admiration, and friendship. There could also be a focus on the acceptance of different Pokemon types, similar to how the characters in 'Fruits Basket' learn to accept each other's differences.
One idea could be creating an OC who is a long - lost relative of one of the main characters. For example, an OC who is a cousin of Tohru. This OC could bring new family secrets and dynamics to the story.
For the Pokemon characters, you can give them human - like emotions and insecurities similar to the characters in Fruits Basket. For example, a Charmander could be shy about its small flame and be afraid of being rejected. Trainers can be developed by giving them backstories that mirror the complex family relationships in Fruits Basket, like having a trainer who has a strained relationship with their family but finds a new family among their Pokemon team.
Ash could be a main character, taking on a role similar to Tohru. He's always kind - hearted and has a way of getting along with all kinds of Pokemon, just like Tohru gets along with the Sohma family. Another could be Misty, who might be like Kyo in some ways, a bit hot - tempered but with a good heart underneath.
One plot idea could be that the OC is a new student at the school Yuki attends. They accidentally bump into each other in the hallway, and Yuki's polite apology makes the OC intrigued. As the story progresses, the OC discovers Yuki's secret about being a part of the Sohma family and helps him come to terms with his insecurities regarding his place in the family and among his peers.
A really interesting crossover is when the Fruits Basket characters' zodiac animals are related to specific Pokemon types. For example, the rat character could be associated with a Pikachu - like electric type Pokemon. It creates a whole new dynamic.
An idea is for the reader to be a journalist investigating strange happenings in the town where the Sohmas live. They suspect something is up with the family and start to dig deeper. As they get closer to the truth, they form relationships with the Sohmas, especially those who are more guarded about the family secret. This could lead to a story full of mystery and self - discovery for both the reader and the Sohma characters.
One common theme is the exploration of friendship. Just as in both 'fruits basket' and the pokemon world, friendship is highly valued. In the fanfiction, characters from 'fruits basket' might form strong bonds with trainers or pokemon in the pokemon world based on mutual understanding and support.
Another concept could be a battle - centered fanfiction. The martial artists from Ranma 1/2 could be challenged by the Sohma family members in Fruits Basket. The Sohmas might use their animal forms to their advantage in combat, while the Ranma characters use their martial arts skills. It could be a series of battles where they learn to respect each other's abilities and in the end, form an alliance of sorts.