Open the door and challenge the gym leader.
the boulder badge from brock
Fuschia city.
In Vermilion city.
fuschia.
fap
Head to Cinnibar Island for your next badge.
vermillon city
Vermilion city.
In cerulean cities gym you must beat the leader misty to get the cascade badge.
Fight Misty laduh
Beat Giovanni at viridian city's gym.
in Viridian city. the one that was locked.