Perhaps Ash returns to Kalos to reunite with his old friends. He might have some unfinished business, like helping a Pokemon in Kalos that he promised to assist. He could also meet new Pokemon species and have new adventures while exploring the region again.
Well, it could be about Ash going back to Kalos to compete in some new Pokemon battles. Maybe he wants to challenge new trainers or participate in a special tournament there.
In the 'ash returns to kalos fanfiction', it could be that Ash hears about a strange phenomenon in Kalos related to Pokemon evolution. So he goes back to Kalos to investigate. Along the way, he meets up with his previous traveling companions and they all work together to figure out what's going on. He may encounter some rare and powerful Pokemon that are crucial to understanding this new evolution - related mystery.
Well, it could be about Ash exploring the new region of Kalos, meeting new Pokémon and trainers. Maybe he'll participate in the Kalos Pokémon League and face some tough opponents with his Pikachu and new Kalos Pokémon he catches along the way.
The plot could be that Ash enters a Kalos - only Pokémon competition with Charizard. They face strong opponents with unique Kalos Pokémon. Charizard might learn new moves by observing the local Pokémon. For example, it could see a Delphox use a powerful fire - type move and try to adapt it to its own style.
In an 'Ash Wins Kalos League' fanfiction, one possible plot could be that Ash finally masters his Mega Evolution techniques better than ever. He has a series of intense battles where he outsmarts his opponents. His bond with his Pokémon, especially Greninja, reaches new heights. They use their unique moves in creative ways to defeat strong adversaries and claim the victory in the Kalos League.
Well, a great plot might be that Ash and Misty are in Kalos on a research mission about Pokémon evolution. Misty is especially interested in how certain water - type Pokémon in Kalos evolve differently compared to other regions. They get separated during their exploration in a mysterious forest in Kalos. Ash has to find his way through the forest with his Pokémon while also looking for Misty. Meanwhile, Misty discovers an ancient water - type Pokémon that is thought to be extinct. In the end, they reunite and share their discoveries.
Well, it could be that Ash has trained with some rare and powerful Pokémon in the Kalos region that are not typically part of his main team. This new addition to his arsenal helps him win the league. Also, he could have received some secret training from a legendary Pokémon trainer in Kalos, which gives him the upper hand in all his battles.
Well, one possibility is that Ash continues his Pokemon training in Kalos, facing new and stronger opponents. Maybe he teams up with old friends from Kalos to take on a new threat to the region.
Well, it might mean that Ash is bringing his powerful and experienced Charizard into the Kalos region for some epic battles. Maybe he wants to show off Charizard's strength against the unique Pokemon in Kalos.
One possible plot twist could be that Ash's Pikachu gets temporarily paralyzed during a crucial battle, which throws off Ash's whole strategy. This is a huge setback as Pikachu is one of his strongest Pokémon. Another could be that the opponent discovers a hidden weakness in Ash's Greninja just in time for the final showdown, something Ash hadn't anticipated. Maybe there's also a situation where the referee makes a controversial call that goes against Ash, adding to the drama of his loss.
Well, one possible plot could be that in the Kalos region, Ash makes a new powerful rival. Haruka, being in Kalos for some reason, gets influenced by this rival's charm and power. In Alola, Ash discovers that Haruka has been secretly helping this rival against him, thus feeling betrayed. Maybe the rival promised Haruka something she couldn't resist, like a rare Pokémon or a chance to become a top - tier trainer in a different way.
One possible plot could be that Ash's so - called friends in the Kalos region turn on him out of jealousy. Maybe they can't handle the fact that he has become the champion. They start spreading false rumors about him, which makes the public turn against Ash. This betrayal could lead Ash to question his own journey and the relationships he has formed.