Well, it depends on the specific fanfiction. Some might have a plot where the chosen one and their roommate embark on an epic Pokemon journey together, facing challenges and making new discoveries.
Typically, the main characters would be the chosen one and their roommate. The chosen one is likely to be someone with a special connection to Pokemon, perhaps having a unique ability or being prophesied to do great things in the Pokemon universe.
Maybe the chosen one has to solve a mystery that threatens the Pokemon world. The Pokemon use their different types of skills like water - type Pokemon using their ability to explore underwater areas to find clues. Fire - type Pokemon can keep the chosen one warm in cold and dangerous places while they search for answers.
A third plot idea might be that Ash is the chosen one to bring peace between the different factions of legendary Pokemon. There could be some legendary Pokemon that are at odds with each other, and Ash, with his unique bond with Pokemon in general, is the only one who can bridge the gap. He would have to understand the reasons for their conflicts, which could be rooted in ancient history or disputes over territory. Along the way, he'd have to convince both sides that cooperation is better than conflict, and he might use his own experiences with his Pikachu and other Pokemon friends to show them how different species can get along.
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.
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.
In some versions, the plot could revolve around Harry exploring different magical realms that are related to death. He might enter a realm where the line between life and death is blurred, and he has to navigate through challenges there. This could involve facing his own fears and insecurities in a very tangible way. For instance, he might see visions of his parents and what could have been if they had lived, but he has to resist the temptation to stay in that false reality and return to the real world to fulfill his destiny.
The 'roomate' manhwa typically centers around the daily experiences and relationships of the roommates. It could have elements like friendship, conflicts, and personal growth. Maybe there's a mystery or a goal they're all working towards.
One idea could be the main character being reborn as a Pikachu and having to navigate the world with its electric powers while making friends with other pokemon. Another could be being reborn as a Eevee and having the unique ability to evolve into any form at will, which causes both envy and admiration among other pokemon. Maybe the reborn pokemon has memories of being a human and uses that knowledge to outwit trainers and other threats.
A plot could revolve around a rookie XCOM soldier who has a special ability that catches the attention of all the Chosen. They each try to sway the soldier to their side, and the soldier has to navigate through their offers while remaining loyal to XCOM. Or perhaps a fanfiction set in a parallel universe where the roles of XCOM and the Chosen are reversed, and we see how the Chosen fight against an oppressive XCOM - like force.
The Chosen One is obviously a main character. They are the central figure around which the story revolves. Their personality could be that of a brave and determined trainer, always ready to face challenges.