"Really , Misty really had a stable goal in Kento ????
Dude . I'm taking about Kento series because that was the most popular.
During that time , Misty always say different goal at different time.
First , She says she wants to be Best at everything . Second , She says she simply want to see the most mysterious Water Pokemon . Third , She say she want learn about Water Pokemon.
Misty didn't had a Stable Goal until Jotho ! Up until then we just knew her goal has something to do with Water Pokemon.
Furthermore, She only reveal a name for her Goal in Jotho.
However , None of us still doesn't know how anyone Water Pokemon Master.
I mean , If we consider Wallace as a Water Pokemon Master since he obviously most strongest Water Pokemon trainer then that wold Misty challenging the league as a mono Trainer to prove herself a Water Pokemon master.
Its the by far the best way to be water pokemon master but it require her to be Ash's rival.
Truth is , Original Kento series didn't gave a dam care about Misty or anybodies Goal . It was just about Ash's goal & Humor."
If we can call Ash's "Worlds Greatest Pokémon Master" (which, BTW, has still yet to be given a concrete definition beyond Leagues, especially when he technically already won one, the Orange Islands League and yet he still is going through the journey as if he never attained the goal) a stable goal, even though there wasn't ANYTHING concrete about it, even with the Gyms and Leagues, yes, we most certainly can call Misty's "World's Greatest Water Pokémon Master" goal the same (DP is pretty much the closest it ever got to actually defining the goal). Besides, it was already clear from the onset that she forsaked her Gym duties specifically to get stronger and prove herself to her sisters (it was explicitly stated in the seventh episode, so you can't refute it), so it wasn't hard to deduce what kind of goal she was pursuing even in Kanto (after all, especially considering Pokémon Contests haven't even debuted yet, and thus being a Pokémon Coordinator didn't exist in its current form, what else could she have pursued that related to battling and proving strength if not a Pokémon Trainer, heck, a Pokémon Master? It's simple deductive reasoning skills.), not to mention she made it an effort to catch Water Pokémon whenever possible. All Johto did was make it explicit.