Well, perhaps she is a captive of Team Rocket in the fanfiction. They might be using her for some sort of experiment related to Pokemon, like trying to extract some special power from her that they think is linked to her bond with certain Pokemon. And Lillie has to find a way to escape while also protecting the Pokemon around her.
She might start off as a scared and naive character. But as she gets more involved with Team Rocket, she could become more brave and resourceful. For instance, she could learn how to fight back against Team Rocket's bullies using her wits and the help of her Pokemon friends.
Team Rocket and Team Plasma have some interesting differences. Team Rocket is more about classic criminal activities like stealing Pokémon for profit. In fanfiction, they often clash with trainers in a more straightforward, greedy way. Team Plasma, on the other hand, has the ideology of 'liberating' Pokémon, which can lead to complex storylines. In many fanfictions, their clash is not just about power but also about different views on Pokémon-human relationships.
If Team Rocket turns Ash into a Pokemon, it could lead to a really interesting story. Ash would have to experience the world from a Pokemon's perspective. He'd understand their struggles, like being caught and trained. This could also be a way for him to better understand his own Pokemon and their bond with him. And it would be a wild adventure as he tries to find a way to turn back to his human form.
In a fanfiction where Ash joins Team Rocket, it could lead to some really interesting storylines. Ash has a lot of knowledge about Pokémon training that Team Rocket lacks. He could potentially teach them new techniques, but at the same time, his moral compass would be constantly at odds with their devious ways. Maybe he joins them because he's somehow tricked or he has his own secret plan to take them down from the inside. It would be a great opportunity to explore different aspects of his character and how he adapts to this new situation.
One interesting Pokemon Team Rocket fanfiction could be about a Team Rocket member who has a change of heart. For example, they might start to see the beauty in the relationship between trainers and their Pokemon and decide to secretly help the heroes instead of causing trouble.
It's really hard to say. Team Rocket has a lot of experience in underhanded tactics and has some powerful Pokémon at their disposal. But Team Plasma has a large following and their ideological drive can give them an edge in terms of determination. It could go either way depending on the specific plot and the Pokémon each side has.
Maybe there's a rogue Pokemon trainer. This trainer is jealous of Dawn's skills and the attention she gets. When Dawn joins Team Rocket, this trainer sees it as a chance to expose her as a fraud. He or she then tries to stop Dawn and Team Rocket's activities, thinking that they are up to no good, which they are, but the trainer has his own self - centered motives.
One idea could be creating an OC who was originally a regular Trainer but got corrupted by Team Rocket's ideals. For example, they might have lost a big Pokemon battle and felt so defeated that they were easily swayed by Team Rocket's promises of power. Another idea is an OC who is a double agent within Team Rocket, secretly working for the good guys to bring down the organization from the inside. They could have a unique Pokemon partner that helps them in their undercover work.
If Team Rocket turns Ash into a Pokemon, his relationship with his old Pokemon would change. His Pokemon might not recognize him at first. But as they sense his familiar spirit, they could try to protect him. And Ash, in his new form, could learn a lot about the true nature of Pokemon. He could discover secrets about their evolution, abilities, and the hidden powers within them that he never knew as a human trainer.