Well, it could be that Team Rocket manages to brainwash the gym leaders into doing their bidding. Maybe they use some new, devious device or a powerful, mind - controlling Pokémon. The brainwashed gym leaders could then start causing chaos in the Pokémon world, like changing the rules of gym battles or stealing rare Pokémon for Team Rocket.
Obviously, the gym leaders themselves would be important characters. They are the ones being brainwashed. And of course, members of Team Rocket like Jessie, James, and Giovanni would be main characters as they are the ones doing the brainwashing. Also, there could be a young, heroic trainer who tries to stop Team Rocket and save the gym leaders.
One common theme could be the power struggle between the brainwashed state and the Pokemon's natural instincts. Another might be the moral dilemma of the gym leaders who are doing the brainwashing. For example, they might be doing it for what they think is a greater good, like protecting their gym or the town, but it goes against the ethics of fair Pokemon battles.
One common theme is power and control. Team Rocket often tries to brainwash Pokemon or trainers to gain an upper hand in the Pokemon world. Another theme could be redemption. Sometimes the brainwashed characters find a way to break free and redeem themselves. Also, the struggle between good and evil is prominent. The heroes try to stop Team Rocket's brainwashing plans and restore peace.
Add unexpected twists. For example, the Pokemon that gets brainwashed could turn out to have some hidden power that makes the brainwashing backfire on the gym leader. This would create a new dynamic and keep the readers on their toes.
The most popular Kalos gym leaders in fanfiction can vary. However, Korrina is often a fan favorite. Her energetic personality and her connection to Mega Evolution through her Lucario are appealing aspects. Additionally, Grant with his rock - type gym and his passion for climbing also has his own fan following in 'pokemon kalos gym leaders fanfiction' as his character can be developed in stories related to strength, determination, and the beauty of the Kalos region's rocky areas.
Self - awareness can play a big role. Sometimes a character starts to notice small things that are off about their new 'loyalties' under the brainwash. They might start to remember their true values and slowly fight against the mental conditioning. Also, external help is crucial. Another character might notice the change in the brainwashed one and use a special item or technique to snap them out of it. This could be a rare Pokemon ability or a magical item in the Pokemon world.
In a Pokemon Red join Team Rocket fanfic, the main character could be a disillusioned trainer. Maybe they've lost a few too many battles and are looking for a new way to gain an edge. Team Rocket seems like an alluring option. They join up and are immediately thrust into the world of illegal Pokemon trading. However, they soon meet a friendly Pokemon that shows them kindness despite their new allegiance. This makes them question their decision to join Team Rocket and they start to think about how they can use their new position to actually help the Pokemon instead of harming them.
Well, if Ash joins Team Rocket in a fanfic, it would be a huge shift in the Pokemon world. His friends, like Misty and Brock, would be shocked. They might try to rescue him. Ash, on the other hand, could initially be attracted to the idea of a new adventure with Team Rocket. He could see them as underdogs in a way, always failing but still trying. But as time goes on, he'd start to see the problems with their way of doing things.
One possible plot could be that Misty gets captured by Team Rocket. They plan to use her as a bargaining chip against Ash. But during her captivity, she manages to befriend some of the lower - level Team Rocket grunts. These grunts start to have second thoughts about their evil deeds because of Misty's influence. Eventually, Misty uses this new - found friendship to escape and also cause some internal chaos within Team Rocket.