Another possibility is a Torchic. Torchic is a fire - type, and it's small and cute but can grow into a very strong Combusken and then Blaziken. It would bring a lot of energy to Fem Ash's team and could be a great partner for her in the early stages of her Pokemon journey, especially when facing off against grass - type Pokemon.
One interesting aspect could be the unique perspective of a female Ash. It might bring new character dynamics to the Pokemon journey. For example, different interactions with the Pokemon and other characters like Brock and Misty. Maybe she'll have a different approach to battles and training.
One potential rival could be a male trainer who has a more traditional view of Pokémon training and looks down on the fem Ash's different approach. He might constantly try to one - up her in battles.
The main difference is the gender of Ash. In the original, Ash is male, but in this fanfiction, being female, she might have different ways of handling situations. For instance, she could be more empathetic towards certain Pokemon types.
Ash could face some tough challenges in this fanfiction. He might have to train in harsh conditions to become a champion. For instance, training on a snowy mountain where Pokemon are stronger due to the environment. His team would need to adapt and grow. Maybe he gets a new Pokemon that is a bit of a troublemaker at first but later becomes a key player in his battles.
One idea could be Fem Ash starting her journey in a region different from the original. For example, she could begin in the Alola region. There, she meets new Pokemon and trainers with unique battling styles. Another plot idea is that she has a special ability to communicate with Pokemon on a deeper level, which helps her in battles and making friends with different Pokemon species.
One interesting plot point could be how the female Ash navigates the Pokémon world with a different perspective than the male Ash. Maybe she forms unique bonds with certain Pokémon that the original Ash didn't. For example, she might have a special connection with a more feminine - typed Pokémon like Gardevoir.
In fanfiction, Ash might discover a special water - type stone that enhances his bond with his water - type Pokemon. This stone could have the power to boost their abilities and his own understanding of them. With this new advantage, he enters water - type Pokemon tournaments and gradually builds his reputation as a water master. He also shares his experiences with his friends, who support him in his journey.
Romance can be a major theme as well. In some fem Ash journey fanfictions, there could be romantic interests that are different from what we might expect in the original series. It could be a different take on her relationship with a male character, or the introduction of new characters for her to have a romantic connection with. This adds an extra layer of complexity to her journey.
Fem Ash might be more in touch with her emotions compared to regular Ash. For example, she could show more compassion towards Mew and other Pokemon in a more feminine way. She may also approach battles with a different strategy, perhaps relying more on finesse and intuition rather than just brute strength like regular Ash sometimes does.