In a fanfiction of Ash in the Unova League, it could focus on his relationships with his Pokemon during this journey. Maybe Pikachu has a special moment of growth, or he catches a new and rare Pokemon that becomes crucial in his battles in the league.
One idea could be that Ash's victory in the Alola League is due to his strong bond with his Pokémon. His Pikachu, for example, could have evolved a new move during the final battle that gave them the edge. Another idea is that Ash's experience from all his previous regions finally culminates in this victory, and he uses strategies he learned along the way.
In the Unova League in the Pokemon series, Ash winning is quite an exciting concept in fanfiction. It shows his growth as a trainer. Maybe in this fanfiction, he finally overcame all his opponents with his strong team, strategic thinking and unwavering determination.
Ash is obviously a very common character as the title includes his name. Pikachu, his trusty partner, is also likely to be there. His friends like Brock and Misty often appear as well. They might support Ash during his league journey or have their own sub - plots related to the league.
Perhaps he defeats some of the Elite Four members who are participating in the league. They are known for their strength, so it would be a huge accomplishment. And of course, any recurring rivals from his past adventures like Trip or Paul.
The fanfiction might start with Ash feeling more determined than ever. He could go on a journey to find rare Pokémon or special items to boost his team. Along the way, he faces many challenges and meets new trainers. In the Pokémon League, he uses his experience from all these encounters. His Pokémon's diverse movesets and his own quick thinking in battles lead him to victory.
One interesting story could be Ash finally achieving his long - awaited victory in the league in a unique way. Maybe he discovers a new and powerful Pokemon that he befriends and uses to outwit his opponents.
One key plot point could be Ash's intense training before the league. He might discover new battle strategies for his Pokemon. Another could be the unexpected challenges he faces during the league matches, like facing a new type of Pokemon he's not well - prepared for. And of course, the final battle where he overcomes his toughest opponent through sheer determination and the bond with his Pokemon.
His toughest opponent could be Gary. Gary has always been a rival to Ash and has a strong and diverse team of Pokemon. Their battle would be intense as they both know each other's battling styles well.
Ash might have a rematch with a previous tough opponent in the Alola League and finally defeat them. His Pokémon's teamwork could be the key factor. For instance, his Alola team could combine their moves in a unique way to overpower the foe.