He has many types.
He is the Gym leader in viridian city
Gym Leader Blue
Red is at the top of Mt. Silver. Blue is the Viridian City Gym Leader.
blue in viridian city
perfessor oak gives it to u after u defete the 8th gym leader in viridian city
The 8th gym leader is in Viridian City.
The reasons is that you are suppose to get all the badges first. Just to spoil this for whoever is reading this, the last gym leader, or the Viridian gym, is the team rocket Boss, Giovani, or whatever his name is =]
He is on Cinnabarr Island.
You CAN NOT become a Gym Leader in Pokemon HeartGold and SoulSilver or ANY MAIN SERIES POKEMON GAME.
Blue, the Viridian gym leader(looks like your rival for Pokemon FireRed/LeafGreen), is on Cinnabar Island. Talk to him and he'll say a few things, then go to his gym in Viridian City.
defeat gym leader.
Viridian City.