I'm not sure which novel you're referring to, The Legend of Kanto. If you can provide me with more information such as the genre of the novel, the author, and the publishing house, I will try my best to provide you with a more accurate answer.
In the Kanto setting, they could explore new places together. Like when they visit the Safari Zone, they might share exciting moments while trying to catch different Pokemon. These shared experiences can lead to a deeper understanding and more affection between them. Also, meeting new trainers and learning from them could be another way. Maybe they meet an old couple who have been traveling together for years with their Pokemon, and this inspires Ash and Serena to be closer.
Well, to conquer Kanto in a fanfiction, you might consider giving your protagonist a unique goal or motivation. Maybe they want to become the ultimate Pokemon master or solve a mystery in the region. And don't forget to include some unexpected twists and turns in the story to keep readers engaged.
It could be about Ash achieving the ultimate goal of becoming the Kanto champion. Maybe it details his journey, the battles he had to overcome, and the growth he experiences along the way to claim the title.
I think Brock and Misty could be main characters too. They travel with Ash in Kanto. Brock with his knowledge of Pokémon care and Misty with her own skills as a trainer could play important roles in Ash's journey to become the champion in this fanfiction. Maybe they offer advice, support, or even join in some of the battles.
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.
Well, in the 'ash goes back to kanto fanfic', it could be that Ash goes back to compete in some special Kanto - only Pokémon battles. He might meet some of his old rivals and have epic rematches. He could also discover new secrets about the Pokémon in Kanto that he didn't know before, like hidden abilities or unique evolutionary paths. And of course, he would probably share his experiences from other regions with the people in Kanto.
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.