One common plotline is that Ash has to find and assemble a group of special Pokemon that are key to saving the world. Another is that he has to master a new and powerful type of Pokemon training exclusive to the Chosen One.
In many Pokemon fanfictions where Ash is the Chosen One, there's a plotline about him being the only one who can access a hidden, powerful realm of Pokemon. He has to go through a series of quests and battles within this realm to gain the power needed to face the ultimate threat to the Pokemon world. His relationships with his existing Pokemon also change, as they become more aware of his special role and are more determined to help him. And sometimes, his Chosen One status is related to a long - lost Pokemon legend that only he can fulfill.
Ash as the Chosen One in Pokemon fanfiction is a really interesting concept. It gives a whole new layer to his character. He could be given a special Pokemon by some mysterious force that is crucial for his destiny. This Pokemon might be one that no one has ever seen before. His friends would also play different roles, perhaps as protectors or guides to help him fulfill his chosen - one duties. And his battles would become even more epic as he has this greater responsibility on his shoulders.
I'm not sure specifically as there could be many different takes on it. Generally, it might be about Ash being some sort of chosen one in the Pokémon world. Maybe he has a special destiny, like being the only one who can stop an evil force or unlock a powerful Pokémon's true potential.
Another plotline could be the Chosen One being from a small, unknown town and suddenly being thrust into a much larger conflict. Along the way, they make friends who are also on their own quests, and together they learn about the true nature of the Pokemon world and their place in it.
One interesting plotline could be the Chosen One's journey to discover their true power. Maybe they start off as a weak trainer but gradually unlock hidden abilities that set them apart from others. They might face challenges like battling against powerful, rogue Pokemon that no one else can defeat.
One common theme is the power of destiny. The chosen one is often fated to do great things, like saving the Pokemon world or bringing peace. Another theme is self - discovery. As they go on their journey, the chosen one realizes their own strengths and weaknesses.
Well, perhaps a plotline where Ash discovers that being the chosen one means he has a connection to an ancient Pokémon prophecy. This prophecy might involve saving the Pokémon world from a looming disaster. Along the way, he might gain new Pokémon partners that are specifically destined to help him in this grand task. He could also face challenges from other trainers who are jealous of his chosen - one status.
Ash is definitely one of the main characters since it's about him being the chosen one. His Pokémon partners like Pikachu are also likely to be main characters as they would be involved in his journey as the chosen one.
One popular storyline is Ash being chosen to save the Pokemon world from a new, powerful and mysterious dark force. In these fanfictions, Ash often discovers hidden powers within himself. Another common one is Ash being chosen to unite different Pokemon regions against a common enemy. This usually involves him traveling to new, uncharted regions. And sometimes, the storylines involve Ash being chosen by an ancient Pokemon deity to restore balance to the Pokemon ecosystem.
One popular 'pokemon ash the chosen one fanfiction' story could be the one where Ash discovers a hidden power within himself that allows him to communicate with all pokemon on a deeper level. This power makes him truly stand out as the chosen one and he uses it to solve complex problems in the pokemon world.
One common theme is the struggle against gender expectations. Since Ash is now female in these fanfictions, she often has to deal with people underestimating her because of her gender. Another theme is the forging of unique relationships. With her new identity, the interactions with other characters, like her friends and rivals, can be different.