A self - proclaimed 'collector' of rare pokemon could be a rival. This person has a huge collection of non - shiny but very rare pokemon and sees Ash's shiny pokemon as the ultimate addition to their collection. They would stop at nothing to get their hands on at least one of Ash's shiny pokemon. And of course, there could be other trainers who simply can't stand the fact that Ash has such an amazing ability and they don't.
There could be a new, evil organization in the fanfiction. Their goal is to use shiny pokemon to power some sort of dark machine or experiment. They target Ash's shiny pokemon because it has a particularly strong energy. This organization would send out their minions to attack Ash and try to capture the shiny pokemon, creating a lot of action - packed scenes in the story.
Obviously, Ash is one of the main characters. He is the trainer who catches the shiny Pokemon. His Pikachu also plays a significant role, as it's always by Ash's side and could potentially have some interesting interactions with the shiny Pokemon.
A great plotline might involve Ash's journey to discover why he can only catch shiny pokemon. Maybe it has something to do with a long - forgotten prophecy or a special power within him. Also, his relationships with his shiny pokemon could be explored deeply. For example, how they communicate differently compared to normal pokemon. This could lead to some heart - warming and exciting moments in the fanfiction.
One interesting plot could be that Ash catches a shiny Pikachu which has some unique powers, like being able to communicate telepathically with other Pokemon. This would change the way Ash interacts with his team and the challenges he faces in battles.
One possible plot could be that Ash stumbles upon the shiny pokemon by pure chance while exploring a new, uncharted area. Maybe he's looking for a specific type of pokemon for a local competition and instead, he discovers this rare shiny pokemon. Another plot could involve the shiny pokemon being in danger from a group of poachers, and Ash has to rescue it. Then, after rescuing it, he forms a special bond with the shiny pokemon which is different from his bonds with his other pokemon.
It could be a jealous trainer. This trainer might see Ash in his shiny pokemon form and want that power for himself. So he tries to capture Ash by any means necessary, setting up all kinds of traps and challenges for Ash and his friends.
It could be Team Rocket. They are always after rare and powerful pokemon. In this fanfiction, they might have a new and devious plan to steal the legendary pokemon that Ash is trying to catch. Their comical yet persistent attempts to thwart Ash would add an interesting dynamic to the story.
There could be some new rivals as well. Maybe there's a young, up - and - coming trainer who has heard a lot about Ash and wants to make a name for himself by defeating the new Frontier Brain Ash. Also, an old acquaintance from one of his previous travels who has also developed into a strong trainer could emerge as a rival. They might have different views on Pokémon training, which would lead to intense battles.
Obviously, Ash is one of the main characters as the title implies he's the one catching more Pokemon. His Pikachu will also be there, as Pikachu is always by Ash's side. There might also be Brock and Misty or other companions from different parts of the Pokemon series, who could either support Ash in his new Pokemon - catching adventures or have their own sub - plots related to the new Pokemon Ash catches.
One significance could be that it makes Ash stand out even more. Shiny Pokemon are rare, so having one would show how special Ash is among trainers.