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 great plot idea could be that Ash discovers an ancient artifact in the Pokemon world that has the power to temporarily transform his Pokemon into more powerful forms. However, a villain also wants this artifact. So Ash has to protect it while also trying to figure out how to use it to his advantage. Along the way, he might also learn more about the history of the Pokemon world and his own connection to it.
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 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.
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 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.
Well, a plot could involve Ash and Grace traveling through time. They might end up in the past where they meet the ancestors of some of the Pokemon they know. They could learn about the origin of certain Pokemon types and use that knowledge to help in the present. Also, a story where they are on a quest to find a rare Pokemon that can grant wishes. Along the way, they face many obstacles and make new friends among the Pokemon and other trainers.
Perhaps a plot where Fennel is researching a particular Pokemon's behavior and Ash helps her in the field. They might encounter some problems with a group that wants to use the Pokemon for not - so - good purposes. They then have to work together to protect the Pokemon and complete Fennel's research.
One plot idea could be Ash getting the ability to shapeshift accidentally. For example, he touches a strange Pokemon or an ancient artifact. Then he has to figure out how to control this new power while on his journey to become a Pokemon master. Another idea is that an evil organization wants to use Ash's shapeshifting ability for their own nefarious purposes, so he has to avoid them and protect his friends.
Maybe Ash's father was part of an ancient Pokemon - protecting clan. In the fanfiction, Ash starts to have strange dreams about his father and these dreams are actually memories passed down through some sort of psychic Pokemon connection. This leads him to search for the clan and learn more about his heritage and his father's role in it. It could involve Ash having to prove himself worthy to the clan.
One plot idea could be that Ash and Ashley team up to compete in a special Pokemon tournament that has never - been - seen - before rules. They have to combine their skills and the unique abilities of their Pokemon to overcome various challenges. Another idea is that they discover a new type of Pokemon in a mysterious forest and have to protect it from an evil organization that wants to use it for bad purposes.