My favorites are:
1. James: I find him to be an interesting character study. He joined Team Rocket to escape from a life in which he was continually abused by his twisted parents and fiancé, who sought to mold him into a hollow proper gentleman without any sense of individuality. In short, his motivation is freedom, not necessarily becoming wealthy and powerful. Those are just added perks for him in the event he does succeed in Team Rocket. Furthermore, he has a very likable personality. Despite being a goofy and emotional guy, he is actually an intelligent person who has common sense and possesses a great deal of knowledge. He is also kind hearted, sensitive, gentle, and has a fun sense of humor.
2. Jessie: She is a multifaceted character with an intriguing past that properly helps to explain her personality in the present. Because she experienced numerous disappointments and was regularly treated poorly by others, she is a domineering narcissist with a hot temper. However, deep down, she still has the same kindness, sense of caring, and friendliness from when she was a young girl, which occasionally manifest themselves. I also admire her for her independence, strong will, and determination.
3. Meowth: He is a witty cat who is sarcastic and often tells it like it is. He also has a well-developed back-story that is quite interesting. Furthermore, his love for Giovanni is a riot.
4. Professor Oak: He is a humorous dirty old buffoon.
5. Delia: She is an amusing scatterbrained MILF.
6. Lyra: She is an assertive, outgoing, and playful girl who always comes out on top. Plus, the way she hits on Dawn, who is completely oblivious to her advances, is hilarious.
7. Khorey: He is Lyra's *****. Enough said.
8. Conway: Who does not like a hilariously creepy stalker? Overall, his fan-boy crush on Dawn was entertaining to watch.