A lot of fanfictions also have a theme of redemption. Meowth, being a former member of Team Rocket, might be on a path to become a better Pokemon, and the reader is involved in that process. It can be really heart - warming to read about how their relationship evolves during this journey of self - improvement.
You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. They usually have a large collection of Pokemon fanfictions, including ones with Meowth and the reader. Just use the search function and type in 'Pokemon Meowth x Reader' to filter the results.
However, over time, he could develop resilience. The experience of being abandoned might force him to become stronger, both physically and emotionally. He may learn to trust again, but it would be a slow process as he has to overcome the initial emotional trauma of abandonment.
One reason could be unrequited love. In the Pokemon world, Meowth has a soft spot for certain Pokemon, like the Skitty. If in a fanfiction, Skitty rejected Meowth's advances, it would make him sad. Another could be his longing for acceptance. Meowth is a part of Team Rocket, but often they don't fully appreciate his skills. He might feel sad and underappreciated in a fanfiction scenario. Also, memories of his past life on the streets, before joining Team Rocket, might haunt him and bring about sadness.
Another plot could be a time - travel story. Meowth and Bonnie somehow get sent back in time to a crucial moment in Pokemon history. They have to figure out how to get back to their own time while also making sure they don't disrupt the past too much. During this adventure, they rely on each other's unique skills and form a strong friendship.
A writer can use Meowth's body language. For example, they can describe his drooping ears, his slow and slouched walk, and his tail hanging low. This physical appearance immediately gives the readers an idea of his sadness. Also, the use of simple dialogue like 'Meowth meow (I'm so sad)' can be effective.
Well, one possibility could be that Meowth betrays Team Rocket. Maybe he gets tired of their constant failures and decides to side with Ash and his friends. He might see that they have a more positive and successful approach to their Pokemon journey.
No, it is not appropriate. Hentai involves pornographic and adult - oriented content which goes against ethical and moral standards, and is not suitable for public discussion or consumption. Moreover, it also violates the family - friendly nature of the Pokemon franchise.
One possibility could be that Meowth evolves after a deep emotional experience. Maybe it befriends a Pokémon that is in great danger and through the process of saving it, Meowth unlocks a new level of power within itself and evolves. This could lead to a whole new form with different abilities and a more noble appearance.
It could be Giovanni. If Giovanni gives an order that Meowth finds completely unacceptable, like harming innocent Pokemon for no good reason. Meowth, having a soft heart deep down, might not be able to go along with it and thus betray Team Rocket.