Obviously, Ash is one of the main characters. He is the one on the journey to become a Pokemon master. Pikachu would also be a key character as Ash's loyal partner. There might also be Brock and Misty, his old friends, who could make appearances and help him out on his journey.
In many fanfictions, Ash achieving the status of a Pokemon Master often involves him having extraordinary battles. He might defeat powerful legendary Pokemon that no one has ever tamed before. His Pikachu could evolve into a more powerful form, which gives him an edge in battles. Also, his bond with all his Pokemon, not just Pikachu, becomes so strong that they can execute complex strategies without any communication barriers.
Well, one interesting plot point could be Ash facing extremely tough opponents that he has never encountered before. This would test his skills and strategies to the limit. Another might be Ash making unexpected alliances with other trainers or even some Pokemon. It could also be that he discovers a new type of Pokemon evolution that changes the game in his journey to become a Pokemon master.
In the fanfic, Ash could enter a major coordinator competition where he faces off against some of the toughest opponents. He might struggle at first because he's used to traditional Pokemon battles. But as the competition progresses, he starts to understand the nuances of coordinator battles better. His friends could also play important roles, like Misty giving him advice on how to make his Pokemon's water - based attacks look more appealing, and Brock helping with Pokemon health and grooming to ensure they look their best during the shows.
One key element could be Ash's character development. In fanfiction, he might face new and unique challenges that further shape him into a Pokemon master. For example, he could encounter extremely rare Pokemon species that test his skills in ways the original series didn't. Another element is the relationships. Maybe his bond with Pikachu deepens even more, or he forms new alliances with other trainers. The setting also plays a role. It could be set in unexplored regions of the Pokemon world, full of new mysteries and Pokemon to discover.
Perhaps the story could involve Ash being transformed into a Pokémon through some magical or scientific experiment gone wrong. As a Pokémon, he would join a group of other Pokémon on a journey. He might face challenges like being hunted by Pokémon hunters or having to prove himself to a Pokémon tribe. Along the way, he'd also learn about the different perspectives of Pokémon in their own world.
In this fanfiction, Ash might have to face a crisis that threatens the entire Pokemon world. By using his skills, the strong bond with his Pokemon, and his experience from countless battles, he could save the world. This heroic act would earn him the respect and recognition needed to be declared a Pokemon Master. He might also gain some new and powerful Pokemon allies during this adventure.
The exploration of different relationships makes it interesting. Maybe Ash forms a deep friendship with a Pokemon that is considered an outcast in the Pokemon world. Their bond and how it helps Ash on his journey to becoming a master can be really engaging. Also, seeing Ash interact with characters from different regions in new ways, like having a cultural exchange of Pokemon training methods, adds depth to the story.
One key element could be Ash's character development. In such fanfictions, he might face new and tougher challenges that push him to grow even more as a trainer. Another element could be the introduction of rare or new Pokemon species. It would be exciting to see Ash interact with Pokemon we haven't seen him with in the original series. Also, his relationships with his friends, like Misty and Brock, might be explored in new and deeper ways, adding more emotional depth to the story.
Ash would likely have to change his training methods. He'd focus more on presentation. For instance, instead of just making Pikachu use Thunderbolt for power, he'd teach it to use it in a more artistic way, like creating a lightning display. His Pokemon would need to learn new skills for the performance aspect.