Well, it could have some really cool plots. Maybe Ash has some secret admiration for Mew that leads him on all kinds of hidden adventures or self - discovery. He might be trying to protect Mew in secret or has a special connection with it that no one else knows about.
The plot could be centered around Ash's secret identity as a Mew fan. He could be collecting information about Mew on the sly. He might face challenges from other trainers or characters who don't understand his fascination with Mew. And there could be a big reveal at some point about his true feelings and the reasons behind his secrecy.
As a Mew fan, Ash might start to study different aspects of Pokémon lore more deeply. This could make him wiser in the ways of Pokémon. He could also develop a more empathetic side towards Mew - like Pokémon, seeing them as not just creatures to battle with but also as beings with their own unique qualities and stories.
One possible plot could be that Ash is on a journey in a mysterious forest. He stumbles upon an ancient and powerful crystal. When he touches it, a strange energy envelops him and he starts to transform into Mew. As Mew, he has to adapt to his new form. He discovers he can fly and communicate with other Pokémon in a different way. He then uses his new abilities to help his Pokémon friends who are in trouble in a nearby cave, fighting off a group of powerful rogue Pokémon.
Perhaps in this fanfiction, Ash discovers that he has a deeper connection to Mew than he ever thought. It could involve Mew choosing Ash as a special trainer to carry out a very important mission in the Pokémon world, such as saving a certain region from a new and powerful threat. This would lead Ash to face many challenges and grow in ways he hasn't before.
One plot idea could be that Ash is on a journey in a mysterious forest and suddenly stumbles upon Mew. Mew, being curious about Ash's kind heart, decides to follow him on his Pokémon journey for a while. Another could be that Ash is in a dream world where he meets Mew, and Mew shows him the potential of his Pokémon in new and exciting ways. For example, Mew could transform into different Pokémon forms that Ash has always dreamed of seeing. A third idea is that Mew is injured and Ash finds it. Ash then has to protect Mew from other Pokémon or humans who might want to capture it while also trying to heal it with the help of his Pokémon friends.
One possible plot could be that Ash has a strange encounter with a Mew. Maybe he discovers a hidden power within himself that is related to Mew. This new power could attract Mew to him, and they form an unexpected bond. Ash then has to learn to control this new power while also facing challenges from other trainers who are jealous of his newfound connection with the rare Pokémon Mew.
In the 'ash is kidnapped by mew fanfiction', one possible plot is that Mew is acting out of a sense of desperation. It might believe that by kidnapping Ash, it can save the Pokémon world from a greater threat. Ash, being the protagonist, would then have to find a way to communicate with Mew and figure out what's really going on, all while trying to escape. Another idea could be that Mew is simply misinformed about Ash and thinks he's a danger, so it kidnaps him to protect the Pokémon realm.
Well, perhaps Ash could be transformed into a Mew through some magical encounter. He might then use his new form to explore the Pokémon world in ways he couldn't before, like flying high above the clouds and seeing the landscapes from a whole new perspective.
Pikachu would most likely be there. Since Pikachu is Ash's closest companion, it would be involved in any story related to Ash. Maybe Pikachu could also have some sort of interaction with Mew, like being a bit jealous at first of Ash's new connection with Mew.
Well, in a fanfiction about Ash catching Mew, there could be a plot where a time - traveling device gets involved. Ash accidentally travels back in time to a period when Mew was more common. He has to adapt to the different environment and rules of that time. There, he meets a young Professor Oak who is also on a quest to find Mew. Together, they embark on an adventure. Along the way, Ash shows his determination and love for Pokemon, which makes Mew interested in him. Eventually, Ash manages to catch Mew, but he also has to figure out how to get back to his own time with his new, very special Pokemon.
One possible main plot could be that Ash hears rumors about a Mew sighting in a far - off, unexplored region. So, he decides to embark on a journey to find it. Along the way, he meets new friends and foes, all while being driven by his desire to meet Mew.