Greta could be developed by exploring her backstory more. Maybe she has a special reason for being so passionate about fighting - type Pokemon. Also, her interactions with Ash could lead to her becoming more open - minded about other Pokemon types. She might start to incorporate different strategies that Ash uses into her own battling style.
Their characters could be developed further through shared experiences. For example, if they were to rescue a group of endangered Pokemon together. This would force them to work together in a different way than in battles. Ash might show his compassion for the Pokemon more deeply, and Greta could learn from his kindness. This would add new dimensions to both of their characters and their relationship.
To develop their characters further, a fanfiction could put them in a situation where they have to save a group of endangered Pokemon. Ash's impulsive nature and Burgundy's more calculated approach could either clash or complement each other. Through this experience, they both learn to adapt and grow. Ash might become more patient, and Burgundy might become more open - minded, which would enhance their individual characters and their relationship.
For Ash, his character could be developed further by showing his growth in understanding different Pokemon cultures. With Molly, he could learn new ways of interacting with Pokemon that are different from what he's used to. For example, if Molly has a closer bond with water - type Pokemon due to her origin, Ash could learn from her how to better communicate with them.
One way to develop their characters further is through a story arc where they are separated from their Pokemon for a while. Ash, who is so used to having his Pokemon by his side, would have to rely on his own wits and survival skills. He might discover new strengths within himself. Lily, too, would be in a similar situation. When they reunite, they could share their experiences and have a newfound respect for each other. Also, they could get involved in a diplomatic mission in the Pokemon world, representing different regions. This would require them to be more diplomatic and understanding of different cultures, which would add new layers to their characters.
For Ash, he could be developed further by showing his growth in understanding the more delicate and nurturing aspects of Pokemon care from Erika. Maybe he starts to learn about different types of Pokemon food and habitats that Erika is an expert in. For Erika, she could be shown to become more adventurous like Ash, willing to step out of her comfort zone of her garden. For example, she could join Ash on one of his more daring quests.
For Ash, he could develop further by learning some of Domino's more strategic ways of battling. This would make him a more well - rounded trainer. Domino, on the other hand, could learn from Ash's unwavering determination and bond with his Pokemon.
For Ash, his character could be developed further by showing his growth in understanding different Pokemon cultures. Hapu could help with that as she has deep knowledge of her own region's Pokemon. For example, Ash could learn about unique training methods from Hapu.
For Ash, his character could be developed further by showing his growth in understanding the more scientific aspects of Pokemon, which Wicke could teach him. He could become more well - rounded in his knowledge.
Bart's character could be developed by making him more responsible. In the fanfic, Greta could be the catalyst for this change. She could give him tasks to do that are important, like helping her with a community project. As he does these things, he realizes he can be more than just a troublemaker. Greta, on the other hand, could be developed by showing her flaws. Maybe she's overly perfectionist and Bart helps her see that it's okay to make mistakes.
For Ash, you could show his growth in understanding more complex Pokemon strategies, especially with Fennel's influence. Maybe he starts to take a more scientific approach to training, learning from Fennel's research.
For Ash, he could develop more patience in his Pokemon training, inspired by Lana's calm and collected nature when dealing with water - type Pokemon. Lana, on the other hand, could become more adventurous like Ash. For example, she could start to explore more terrains outside of water - related areas.