nothing, that is the 16 gym the 15 gym is at seafoam islands
go to the gym and talk to the guy
Defeat the Mahagony Gym.
you have to get the cianwood gym badge and the olivine gym badge
there is no 9th gym
You have to go in the lighthouse and get the gym leader. Then you fight the gym leader and the guy in front of the town will leave and you will be able to get there.
You CAN NOT become a Gym Leader in Pokemon HeartGold and SoulSilver or ANY MAIN SERIES POKEMON GAME.
walk in
He hides the generator in the Cerulean Gym beside a swimming tube at the back of the gym (Around where misty would have been in the Gym)
The gym is in Blackthorn City.The gym leader is Clair.
He has many types.
In Pokémon HeartGold, you can find the 3rd Gym Leader in Goldenrod City.
awww by beating the 7th gym