At Cerulean Cape.
Golduck, Quagsire, Lapras, and Starmie.
you find her in the cerulian city gym
Nobody knows actually.
go to the third gym (lt.surge)
Battle Misty
top left tube
it is next to her high chair.
go to the end of cerulen cape then talk to Misty. go back to cerulan city and she will be at the gym.
..... Misty has water type like she has had throughout all games! i mean, really! the name 'Misty' kind of gives it away!
it's in the gym where u vs. misty
you go to cerulean city and beat misty.