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.
Perhaps Fem Ash decides to focus on training Pokemon that are often overlooked or considered weak. She could build a team of these 'underdog' Pokemon and prove that with the right training and strategy, they can be as powerful as any other. Along her journey, she might face discrimination from some trainers who don't believe in her methods, but she overcomes it with her determination and the strength of her Pokemon team.
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 idea could be Ash meeting a new and extremely rare Pokemon that has unique abilities. This Pokemon could initially be distrustful of Ash but over time form a strong bond with him. Another plot could involve Ash getting lost in a previously unexplored region within the Pokemon world, filled with new Pokemon species and challenges.
A plot could involve Ash finding a time - traveling device during his Kanto journey. He accidentally travels back in time and meets a younger version of Professor Oak. Together, they solve a mystery that has been affecting the Pokemon in Kanto for generations.
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.
One idea could be that Ash discovers a new type of Pokemon that has unique abilities and is the key to solving a big mystery in the Pokemon world. For example, it might be able to communicate with humans in a way no other Pokemon can, and Ash has to learn how to work with it to stop an evil organization from using this Pokemon's power for bad.
In some fanfictions, Ash might form an unexpected alliance with a rival. This alliance could be born out of a common goal, like saving a particular region from a new and dangerous threat. They would have to put aside their differences and combine their skills and Pokemon teams to succeed.
One idea could be Ash traveling to a new, mysterious region full of never - before - seen Pokémon. He could encounter a powerful and rare Pokémon that becomes his new partner. Another could be Ash getting lost in a time - warp and having to find his way back while also learning about the past of the Pokémon world.
Well, a really cool plot for Pokemon journey fanfiction might be about a group of trainers who get stranded on an island full of rare and powerful Pokemon. They have to learn to survive and bond with these new Pokemon to find a way off the island. Also, a story where a trainer's Pokemon gets sick and they have to search for a special cure throughout their journey, facing many challenges along the way. And, a fanfiction could focus on a trainer who is on a quest to find a legendary Pokemon that has been lost for centuries.
One idea could be that Ash's twin has a different approach to catching Pokemon. For example, while Ash is more impulsive, the twin might be very strategic. Another could be that the twin has a special bond with a certain type of Pokemon that Ash doesn't. Maybe the twin has an easier time communicating with psychic - type Pokemon and uses this to their advantage in battles and adventures.
Perhaps in the fanfiction, Ash and Dawn find a group of Pokémon that are being mistreated by a cruel trainer. They decide to rescue these Pokémon and in the process, they have to outwit the trainer and his goons. They also find a special Pokémon egg during this adventure. As they continue their journey, they take turns protecting the egg and learning more about the bond between a trainer and their Pokémon as they wait for the egg to hatch.