In this fanfiction, perhaps the shiny ghost pokemon is a sign of something bigger. It could be a herald of a great danger or a great opportunity in the pokemon world. Ash starts his journey with this encounter and has to figure out what it means. He might meet some old - time pokemon trainers or sages who give him clues about the shiny ghost pokemon and its significance, and he has to travel to different regions to understand it all.
The plot might involve Ash being initially scared of the shiny ghost pokemon. But as he realizes it's not harmful, he decides to help it. This could be because the pokemon is being chased by some evil - doers who want to use its shiny uniqueness for their own bad purposes. Ash then teams up with his other pokemon to protect this new friend and in the process discovers a whole new side of the pokemon world related to ghosts.
Well, one possibility is that Ash meets the shiny ghost pokemon early on his journey. Maybe it's a Gastly that has some special power. Ash could then try to befriend it, facing challenges from other trainers who also want this rare pokemon. The shiny Gastly might lead Ash to an old, haunted place full of secrets about pokemon evolution or some long - lost pokemon techniques.
In this fanfiction, Ash could start in a mysterious forest and spot a shiny Celebi. Celebi, being a time - traveling Pokemon, could take Ash on a journey through different time periods in the Pokemon world. He might see how the Pokemon world has evolved over time, meet some of his ancestors or future versions of himself, and have to solve various problems in each time period to keep the balance of the Pokemon world.
The plot could involve Ash starting his journey in a unique way. Since he has a shiny Charmander, it might attract the attention of Team Rocket more than usual. They could constantly try to steal it, creating many action - packed chase scenes. Ash would have to train his Charmander to be stronger to fend off these threats. Along the way, he could meet other trainers with rare Pokémon who are both friends and rivals, all while aiming for Pokémon League championships.
Ash would likely become more open - minded. Meeting a shiny ghost pokemon at the start would expose him to a type of pokemon he might not have expected so early. This could make him less fearful of the unknown in general. For example, he would be more willing to explore spooky places or deal with pokemon that have a reputation for being difficult to handle.
One possibility is that Ash's Ekans could be a special one with unique abilities. Maybe it has a hidden power that helps Ash in battles against stronger opponents. For example, it could have a super-effective type of attack that is not common among Ekans, like a special poison - type move that can paralyze opponents for a long time.
If Ash starts with a legendary pokemon such as Rayquaza, it could be that there are abnormal weather patterns in the Pokemon world. Rayquaza has the ability to control the weather. Ash and Rayquaza team up to figure out what is causing these extreme weather changes. Along the way, they meet other trainers who are also affected by the weather problems. Ash has to prove that he is worthy of having a legendary pokemon by using Rayquaza to restore balance to the weather.
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.
Well, perhaps Ash could gain new and amazing powers. Shiny pokemon often have special abilities or appearances, so if Ash turns into one, he might be able to fly like a shiny bird - type pokemon or have super strength like a shiny fighting - type. He could also use his new form to communicate better with pokemon, since he'd be more like them.
One possible plot could be that Ash's shiny Pikachu is targeted by an evil organization because of its rarity. Ash has to protect it while also trying to figure out why the organization wants it so badly.
Another possibility is that the shiny Riolu has some special powers that Ash discovers. They could be related to a hidden legend in the Pokemon world. Ash and the Riolu then have to protect this secret from those who would use it for evil. They might travel to ancient ruins and encounter other mysterious Pokemon on this journey.
Well, it depends on the specific fanfiction. Some fanfiction authors might choose to give Ash shiny Pokemon as a way to show his growth or as a special encounter. For example, he could find a shiny Pikachu in a different region in one fanfic, which would then lead to a whole new set of adventures and challenges. It adds an element of surprise and rarity to the story.