Another great plot idea could be a crossover of the two worlds' villains. Team Rocket from Pokemon and the Akatsuki from Naruto teaming up to cause chaos. The heroes from both worlds, Naruto and the Pokemon trainers, would then have to work together to stop them. This would involve a lot of action, with the different fighting styles and powers of both universes coming into play.
One interesting plot could be Naruto getting transported to the Pokemon Sun and Moon world and having to learn how to be a Pokemon trainer. It would be cool to see how his ninja skills translate into the Pokemon universe.
One idea could be that Naruto and his friends are transported to the Alola region in the Pokemon Sun and Moon world. There, they discover new Pokemon and learn about the unique Z - Moves. Naruto might befriend a Rowlet because of its small and cute appearance but also its determination, much like himself. He could train with it and enter Pokemon battles using his ninja skills to strategize.
One idea could be a story about a trainer who discovers a rare and powerful Pokemon that was thought to be extinct in the Alola region. This Pokemon could have unique abilities that attract the attention of both good and bad characters in the fanfiction.
One idea could be Guzma's backstory exploration. Maybe he had a difficult childhood that led him to form Team Skull. Another plot could involve a friendship between Guzma and a new trainer in Alola. They start off as rivals but gradually become friends and learn from each other.
Well, perhaps Serena could get involved in a mystery regarding a rare and powerful Pokemon in Sun and Moon. She could team up with some local trainers to solve it. Maybe there's a hidden cave where this Pokemon is rumored to be, and along the way, she discovers new forms of Pokemon she's never seen before. This would add an element of adventure to the fanfiction.
One idea could be a trainer from the Sun region traveling to the Moon region and having to adapt to the different Pokemon species and cultural differences there. For example, they might be shocked by the unique Z - Moves in the Moon region. Another could be a group of Pokemon from both regions coming together to stop an evil force that threatens both their lands. Maybe a dark organization is trying to capture rare Pokemon from both areas for their own sinister purposes.
A possible plot is that the Akatsuki from Naruto are after some powerful and rare Pokemon in the Alola region. They believe these Pokemon can give them ultimate power. The Alola trainers, along with Naruto and his team, have to stop them. Naruto could bond with a Pikachu that has some unique abilities, similar to how he bonded with Kurama. They face off against the Akatsuki in epic battles where both ninja techniques and Pokemon moves are used.
One interesting plot idea could be that Sun and Lillie go on a journey to discover a new type of Pokemon that has been rumored to exist in a hidden part of Alola. Another could be that they have to team up to save Lillie's mother from some sort of dark force. Maybe they also find a time - traveling Pokemon that takes them back to the past of Alola, and they learn about the origin of some of the local traditions.
One idea could be that Greninja returns with a new power that it gained during its time away. It could use this power to help Ash in a crucial battle in the Alola region. For example, it might have learned to control water in a more unique way, like creating ice sculptures that can attack opponents.
One interesting plot idea could be that the main character swaps bodies with their Pokemon. They then have to figure out how to communicate with their trainer friends and battle in the Pokemon's body. Another idea is that two rival trainers swap bodies and through this experience, they come to understand each other's motives and struggles better. A third idea could be a body swap between a legendary Pokemon and a regular trainer, leading to chaos as the trainer tries to handle the power and responsibilities of the legendary while the legendary tries to adapt to the human world.
One interesting plot idea could be a story where Gladion and Lillie have to team up to rescue a rare and endangered Pokemon. They might face various challenges along the way, like dealing with Team Skull. Another idea is a time - travel plot where they go back in time to learn more about their family's past and how it relates to the Pokemon world. Or perhaps a story where they are separated in a different dimension and have to find their way back to each other while making new Pokemon friends and allies.