In the 'Ash Goes to Rota Earlier' fanfiction, perhaps Ash might encounter different Pokémon species earlier than in the original story. He could form new and unique relationships with the local Pokémon trainers in Rota. Maybe he would discover a new training method specific to that region.
Ash could make friends with local Pokémon researchers in Rota. They might share their knowledge about Pokémon behavior native to the area with him.
Ash might encounter new Pokémon in Galar. For example, he could come across Grookey, Scorbunny or Sobble, the starter Pokémon of Galar. He may also meet new trainers and have exciting battles with them.
In an 'Ash goes to school fanfiction', Ash might make new friends at school. He could encounter different Pokémon - related challenges in a school setting, like having Pokémon battles as part of a school competition.
In this fanfiction, Ash might make new friends at Pokemon school. He could learn new training techniques for his Pokemon. Maybe he'll also face some tough competitions against other students.
Well, he may face new challenges in the trainer school. There could be tough exams on Pokémon knowledge and battle strategies. He might struggle with some theoretical parts but shine in the practical battle tests.
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.
In Rota, there could be a Pokemon - related prophecy. Ash and Misty are somehow at the center of it. They have to figure out what the prophecy means and how it relates to their journey. Along the way, they meet different characters in Rota who either help or hinder them. Their relationship is put to the test as they face difficult decisions based on the prophecy, but in the end, they come out stronger together.
In this fanfiction set in Rota, Ash and Misty might stumble upon an ancient mystery. Maybe there's a legend in Rota about a powerful water - type Pokemon that was once a guardian of the island. Misty, being a water - type Pokemon expert, is immediately intrigued. Ash, of course, is eager to help her uncover the truth. As they explore ruins and talk to the local elders, they grow closer and start to realize their feelings for each other in a new light.
One possibility is that Ash would be a bit of a star at the Pokemon school. Since he has so much experience traveling and battling. He could inspire other students to be more adventurous with their Pokemon. Also, there could be some unique Pokemon species that are only studied at the school which Ash gets to interact with.
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.