May could also be the main female character. She's always been interested in different Pokémon species. In this fanfic, she could be researching a group of female Pokémon that have special abilities related to nature. Ash joins her in her research, and they have to overcome various obstacles, like other trainers who want to capture these special Pokémon for themselves.
Another option could be Dawn. She has a passion for Pokémon contests. The fanfic could be about her journey to train a particularly difficult - to - train female Pokémon for a major contest. Ash asks Professor Oak about her progress, and Oak tells him some interesting stories about Dawn's training methods and the bond she's forming with the Pokémon.
One possible plot could be that Ash is on a journey and meets a unique female Pokémon trainer. This trainer has a special bond with a rare female Pokémon. They team up to enter a Pokémon competition that is only for female trainers and their Pokémon. Along the way, they face challenges from other trainers who underestimate them. Ash, with his experience, helps the female trainer strategize and they both learn from each other about different Pokémon types and how to train them better.
Some fans might be shocked as it goes against the typical friendly relationship between the two in the original Pokémon series. It could divide the fandom, with some fans being intrigued by this new and different take, while others might be outraged as they prefer the traditional relationship.
A powerful and evil Pokémon trainer could be the main antagonist. This trainer might have a team of extremely strong and rare Pokémon that he has trained in unethical ways. He could be after some sort of power or rare item that would give him even more control over Pokémon, and Ash stands in his way of getting it.
The main characters are obviously Ash and Professor Oak. Ash is the young and enthusiastic Pokemon trainer, and Professor Oak is the wise and experienced Pokemon expert.
Another possible main character could be Gary. Since Gary has a connection to both Ash and Professor Oak, he could play a role. Maybe he's jealous of Ash getting special training from Oak and tries to interfere or he could also be inspired by Ash's training and start his own journey of improvement. Also, Misty or Brock could be involved as they are Ash's friends and might visit during the training to see how he's doing.
Obviously, the main characters would be Professor Oak and Ash's mom. Professor Oak is known for his vast knowledge of Pokemon, and Ash's mom is important as she is Ash's mother and has supported his Pokemon journey from the start.
Well, it could be about Ash getting some really special and secret training from Professor Oak. Maybe Oak teaches him some unique battle strategies that no one else knows. This could lead Ash to become an even more formidable trainer in the Pokemon world.
It could be a young trainer. This trainer might be on a journey to discover more about Professor Oak and the significance of the blue or green stole. They might be new to the world of Pokemon and their encounter with the stole and Professor Oak sets them on an adventure.
One possible reason could be that in the fanfiction, Ash might be depicted in a way that goes against Professor Oak's character values. For example, if Ash is shown as disrespectful to the Pokémon world's traditions which Professor Oak holds dear.
The fanfiction might also focus on Ash's personal growth as he works closely with Professor Oak. Maybe Oak teaches Ash more about Pokémon history and lore, which in turn helps Ash become a better trainer. For example, learning about the ancient powers of certain Pokémon could give Ash an edge in battles. Ash could then share this knowledge with his friends and other trainers.