Perhaps Ash is on a quest to complete a special Pokémon research project this time. He travels through the regions, interviewing different trainers and Pokémon experts. He might get involved in some local Pokémon traditions and competitions that he hadn't experienced before. His Pikachu will surely be by his side, and they might develop new battle strategies against the diverse Pokémon they encounter.
In this fanfiction, Ash might encounter new Pokémon species in the regions he revisits. He could also form new friendships or rivalries with trainers he meets along the way.
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.
In such fanfiction, there could be new locations and storylines. Maybe they face unexpected villains or uncover hidden secrets together, adding excitement and novelty.