To Weedy Spyze:i guess what you liked about Misty was slapstick humor in Kanto and violent aspect exploding at everyone constantly,so once she calmed down abit she became boring to you disliking way she grew. And i respect that being matter of opinion what is interesting, and what isn't.
But as far as i go i enjoyed in growth through she went as character starting out as short tempered girl exploding over everything trying to cover up her insecurities with temper, with time gradually growing in more mature and confident character over time with various sides of her personality(beside only temper) being explored more still being quirky. Which led to some great character development with Misty gaining sisters respect getting over complex of feeling less worthy, getting over Gyarados fear, growing as water trainer coming in light of more confident and independent person while still having charm,her humor and quirky side being passionate about battling,water pokemon,hobbies etc
I watched Johto recently ago and chronicles and i can say character was equally interesting imo. with different personality traits coming out on surface more.
She was still sarcastic, girly ,passionate toward battling and water types,witty and timid etc with different personality traits coming out on surface more, instead of just temper which still existed. Yelling at times at others and Ash with difference of being less impulsive compared to early days, and becoming overall more snarky and grungy instead not being so straightforward.
From what i noticed during rewatch main problem was in not just Msty but all characters in general,not receiving enough focus to properly shine. That's why in some Johto episodes you can barely see her interact aside from few lines, its because she was in background not playing any role nor having chance to properly show her qualities. This happens to every character if he is in some episodes sidelined too much(Brock and even Ash had same problem there with writing for Johto being poor due to writers inexperience back than not dividing focus adequately). But generally speaking Misty was still very fun playing of great with several various characters adding to dynamic in Johto. I also liked her hosos and AG appearances being very intriguing finding right balance between tomboyish and girly side.