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.
Well, without reading it, it's hard to say precisely. However, if Ash is the prince of Rota in the fanfiction, it may center around the politics and power dynamics within Rota. Maybe there are battles for the throne, or Ash has to deal with various factions trying to use him or undermine him. It could also explore his personal growth as he takes on the responsibilities of being a prince.
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.
I'm sorry I can't really recommend a specific one similar to it right away. But you can try looking on fanfiction websites. Search for stories with similar themes like royalty, a character named Ash, or the setting of Rota. You might find some that have a similar feel in terms of plot or character development.
Ash might meet a strict teacher who has no idea about Pokémon at first but gradually becomes interested in them. He could also meet a rival in school who challenges him not only in academics but also in Pokémon battles.
Well, the story could start with Ash arriving at the Pokemon school. The school could be in a new region, filled with Pokemon that Ash has never seen before. He quickly realizes that the teaching methods are different from what he's used to. There could be a strict headmaster who initially doubts Ash's abilities because of his unorthodox way of training. But as time goes on, Ash proves himself by using his unique bond with his Pokemon. He could also participate in school tournaments, where he showcases his skills and strategies, and along the way, he might even inspire other students to think outside the box when it comes to Pokemon training.
Gary could be one of his rivals. Gary has always been competitive with Ash. Another potential rival could be a new character introduced in the fanfiction, someone who is really good at Pokemon battles and wants to prove himself better than Ash.