Perhaps in the fanfic, Ash has achieved a lot in his Pokémon journey, and Misty has also become a more skilled Pokémon trainer. When they meet again, they start to compare their experiences. Ash could show Misty his new and powerful Pokémon, and Misty could introduce Ash to some new training techniques she has learned. And then they decide to train together for a while to improve their skills even more.
Maybe a mysterious organization that is trying to capture all the Pokémon in the area where Ash and Misty meet again. They would be the antagonists as Ash and Misty would try to stop them. This organization might have some powerful Pokémon and devious plans that Ash and Misty have to figure out and defeat.
Well, in the Pokemon anime, Ash and Misty's relationship is quite complex. They often bicker like typical rivals but also show deep care for each other. For example, Misty is always there to support Ash during his battles, and Ash respects Misty's skills as a water - type Pokemon trainer. There are many moments where their connection seems to be more than just friendship, which can be seen as the basis for a potential love story.
In the fanfiction, Misty catches a Pokemon that has a special ability. Ash, being the competitive trainer he is, challenges her to a battle right away. The battle unfolds in a unique location, perhaps near a waterfall. Ash sends out his Charizard, and Misty uses her newly - caught Pokemon. The clash between fire and water - based attacks creates a spectacular scene.
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.
Well, if Misty stayed with Ash, their teamwork in battles could improve a lot. Also, there could be more emotional moments and fun interactions between them. Maybe they'd discover new places and Pok茅mon together.
Misty would probably be shocked at first. After all, she and Ash have been friends for so long. But then she would be overjoyed. She might blush deeply and have tears of happiness in her eyes as she says yes.
One idea could be that their daughter discovers a new type of Pokemon that no one has ever seen before. She embarks on a journey to learn more about it, just like Ash did in his early days.