What are some interesting plot ideas for a Pokemon Emerald x Ruby fanfic?

Another interesting plot could be that the main character's Pokemon start to develop strange behaviors. It turns out that there is a mysterious force in the region that is affecting their minds. The character has to embark on a journey to find the source of this force and stop it before it causes chaos among all Pokemon.

One idea could be focusing on a trainer who is trying to reunite the two legendary Pokemon of Ruby and Sapphire, Groudon and Kyogre, to stop a greater threat that emerges when their power imbalance causes natural disasters. The trainer has to travel across both Hoenn regions, facing challenges from different gym leaders who have different views on how to handle the situation.

One idea could be to focus on a trainer who discovers a rare and powerful Pokemon in an unexpected part of the Hoenn region. Maybe a Pokemon that was thought to be extinct. Another could be a fanfic where the main character has to stop an evil team from misusing a powerful ancient artifact in Ruby's world. Or perhaps a story about a Pokemon trainer who befriends a Pokemon that has trouble evolving and they go on a journey to find a special way to make it evolve.

One idea could be a story where the main character discovers a new, hidden type of Pokemon in the Emerald region. This Pokemon could have unique abilities that disrupt the existing power balance in battles.

One idea could be a story where the characters from Pokemon Gold and Pokemon Ruby team up to stop a new, powerful villain who is trying to control all the Legendary Pokemon. They could travel through both regions, facing different challenges along the way.

One idea could be a trainer starting with a randomized starter that has an unexpected type combination, like a Fire/Grass type. This would lead to unique battle strategies and interactions with other trainers. Another could be a story where the Pokemon world's geography is randomized too, so the trainer has to navigate through unfamiliar terrains.

One idea could be exploring the backstories of the characters in more depth. For example, delving into their past relationships, traumas, or what led them to be in the situation during the Emerald Twilight. Another could be a 'what if' scenario, like what if a different character had made a crucial decision during that time. Maybe a fanfic where a minor character steps up and changes the course of events.

One plot idea could be that Sapphire and Ruby are having a disagreement about how to best protect Steven. Sapphire, with her future vision, sees a potential threat approaching in a very different way than Ruby does. This leads to some tension between them as they try to figure out the best course of action for Steven's safety.

Maybe they get transported to an alternate universe where they are the only two people who remember their original world. They have to rely on each other to survive and find a way back home. Along the way, they learn things about each other that they never knew before, like Ruby's hidden insecurities and Weiss's dreams for the future. This journey could bring them closer together.

A third idea is that the reader is a Pokemon trainer who has lost their memory. They wake up in a Pokemon center with no recollection of who they are or what their Pokemon are. With the help of the Pokemon center nurse and their own Pokemon, like a Pidgey, they start to piece together their past. As they travel around to different places looking for clues, they encounter various challenges and make new friends, both human and Pokemon.