The fanfiction could depict Ash's journey through Kanto with a focus on his personal growth. He may start to understand the deeper meaning of being a Pokemon trainer. There could be events where he has to make tough choices, like choosing between two Pokemon he really wants to catch. And his interactions with other trainers might be more complex, leading to rivalries or friendships that are more nuanced than in the regular Kanto story.
In the fanfiction, Ash might encounter unique Pokemon not typically found in the main Kanto storyline. He could also form different relationships with his companions. Maybe he faces a new and powerful villain that isn't in the original.
One key event could be that Ash forms a unique bond with his Pokémon. Maybe Pikachu discovers a new powerful move during training specifically for the league. Another could be that Ash's rivals make some mistakes during their battles with him. For example, they misjudge Pikachu's speed or power.
Another important moment could be their visit to the Pewter City Gym. Ash is eager to battle Brock, and Serena might be nervous for him. Ash's battle strategy and how Serena supports him during the fight could be a crucial part of the story. Maybe Serena gives Ash some advice based on her observations, which helps him win the battle.
One interesting plotline could be Ash encountering a rare and powerful Pokémon that isn't part of the original Kanto Pokédex. For example, a shiny Mewtwo that he has to befriend instead of battle. Another could be Ash getting lost in an uncharted part of Kanto and having to rely on his Pokémon's unique skills to find his way out, like Pikachu using its electricity to create a signal. Also, a plotline where Ash teams up with a group of Pokémon trainers who have different goals but they all learn from each other during their journey.
He might meet a mysterious old trainer who imparts some unique wisdom. There could also be a young and talented trainer who becomes his rival or friend.
Their relationship develops as they face challenges together. In Kanto, every new Pokemon they encounter, every Gym battle Ash participates in, Serena is there. She cheers him on, and through this shared experience, they grow closer. For example, when Ash loses a battle, Serena is there to comfort him, and this makes their bond stronger.
Ash and Pikachu are the top ones. But in addition to them, Nurse Joy is quite popular in some fanfictions. She can be more than just the healer of Pokémon, like having a secret past or special powers. Officer Jenny is also sometimes a key character. Her role in maintaining law and order in Kanto can be expanded in fanfiction. And then there are the Gym Leaders of Kanto. Each Gym Leader has their own fan following, and they can be written in many different ways in fanfiction to interact with Ash and his journey.
Brock is a must - include. His knowledge of Pokemon and his skills as a trainer can add depth to the story. He can also provide comic relief at times.
Some fanfictions focus on Ash's growth as a trainer in Hoenn. He might learn new battle strategies, for example, adapting to the different types of Pokémon prevalent in Hoenn. There could be plot points around his interactions with Hoenn - native Pokémon species that he hasn't encountered before. And his experiences with the different cultures and traditions in Hoenn can also be central to the story, as he tries to understand and respect them while on his journey.
A common theme is friendship. Ash forms many bonds with his Pokémon and fellow trainers during his Kanto journey, and fanfics often explore these relationships further. Another theme is growth. Fans like to write about how Ash develops as a trainer in Kanto, learning new battle strategies and becoming more confident.
This fanfiction sees Ash and May revisiting Kanto with a mix of nostalgia and excitement. They encounter rare Pok茅mon and have memorable battles along the way.