In some versions of the 'ash catches mew fanfic', Ash might have a special encounter with a legendary Pokémon trainer who gives him a rare item or some advice on how to catch Mew. This encounter could be the turning point in his quest. And sometimes, Mew itself may be in a situation where it's more vulnerable, which gives Ash the opportunity to attempt the catch.
There are 'Ash Catches Mew' fanfictions where Ash catches Mew accidentally. He might be trying to save Mew from some other danger, like a group of poachers. In the heat of the moment, Mew decides to trust Ash and goes into his Pokéball. This unexpected turn of events then leads to a whole new adventure as Ash has to deal with the implications of having caught such a rare and powerful Pokémon.
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.
Obviously, Ash is one of the main characters. He is the protagonist who is on the mission to catch Mew.
Perhaps Mew and Mewtwo are in a fight against an evil force that threatens the Pokémon world. Ash arrives at the scene and manages to communicate with them. He offers his help and through their combined efforts, they defeat the evil. As a result, Mew and Mewtwo see Ash as a true hero and allow him to catch them, leading to a new chapter in Ash's Pokémon journey.
One typical plot point is how Nebby behaves before being caught. It could be scared, curious, or even a bit mischievous. Also, after the catch, the fanfiction might explore how Nebby adapts to being with Ash. Maybe it has trouble adjusting at first but then grows to trust Ash completely.
Well, one possible interesting plot could be Ash using his unique bond with his Pokémon to outwit Mewtwo. Maybe he convinces Mewtwo that not all humans are bad through the kindness shown by his Pokémon team.
I'd recommend a fanfiction where Ash catches Mew during a battle tournament. In this story, Mew enters the tournament secretly, and Ash is the only one who realizes it's Mew. He manages to catch it during the final showdown. The story is full of intense battles and great character development for Ash.
Maybe in the fanfic, Ash hears about a powerful Mightyena causing trouble in a certain area. He goes to investigate and discovers that the Mightyena is actually being controlled by an evil force. Ash battles the controlling force and after freeing the Mightyena, it becomes his ally.
A mew mew fanfic could explore what would happen if a new character with unique powers joined the mew mew group. This new character could bring in new dynamics and challenges for the existing team. Also, a fanfic set in a post - mew mew world where they have to deal with the aftermath of their battles and how society has changed because of their actions would be interesting. It could show how they adapt to a more peaceful life while still having their powers.
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.