One exciting plotline could be Ash encountering a new and extremely powerful Pokemon that he has to figure out how to catch. Maybe it has unique abilities that no one has ever seen before.
In some fanfictions, Ash might have to face a team of powerful trainers who are trying to disrupt the balance in the Pokemon world during his X and Y adventure. This could involve intense battles and strategic thinking on Ash's part. He might have to form new alliances with other trainers to stand a chance against them.
Pikachu is definitely a common character. It's Ash's most loyal partner and is always by his side during his adventures. Serena is also often present. She has her own dreams and goals related to Pokemon and often travels with Ash, providing support and sometimes even competing with him.
One interesting story could be about Ash's journey in the Kalos region in a more in - depth way. For example, his encounters with different Pokemon and trainers that weren't fully explored in the anime. Another might focus on his relationship with his Pokemon in a new light, like how he trains them specifically for Kalos - style battles.
One popular plotline could be Ash and Goodra going on an adventure together to discover a new type of Pokemon. Another might be Goodra developing a special bond with Ash that helps him in a Pokemon battle. Maybe there's a plot where Goodra gets sick and Ash has to find a rare cure for it.
One idea could be Serena and Ash getting lost in a mysterious forest in the Kalos region. They have to rely on each other's skills and the Pokemon they have with them to find their way out. Along the way, they might discover a new and rare Pokemon species.
Well, a cool plotline might involve a group of friends who discover a new type of pokemon battle that no one has seen before. They have to figure out the rules while also facing off against a rival group who wants to use this new battle style for their own gain. It would be full of mystery and action.
Some plotlines involve Latias taking Ash to a hidden or magical place. This could be a place where only Latias and a few special Pokemon know about. There, Ash discovers new Pokemon species or rare items. Also, in some fanfictions, Latias and Ash are fated to meet because of some ancient prophecy. They then have to fulfill that prophecy together, which usually involves saving the Pokemon world from a great danger. This often includes facing powerful and dangerous foes that they can only defeat by working together and using their combined skills.
One possible plotline could be Ash's discovery of his own latent legendary powers. Maybe he starts to exhibit abilities that are unique to legendary Pokemon, like controlling the weather or having an extraordinary bond with all types of Pokemon.
Well, in some pokemon contest and ash fanfiction, Ash might participate in a special Pokemon Contest where the rules are different. He could encounter rare Pokemon during the contest preparation. Maybe he meets a mysterious Pokemon that has a special connection with one of his existing Pokemon. And through this encounter, he discovers a new strategy for the contest that involves this newfound relationship between the Pokemon.
You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. These platforms have a large collection of fan - created stories, and you can simply search for 'Pokemon Ash X and Y' to find relevant fanfictions.
A crossover could be that Naruto and his friends learn to be Pokemon trainers. They might have trouble understanding the concept at first but then quickly adapt. For instance, Sasuke could be drawn to dark - type Pokemon because of his own dark - natured abilities.