bring Pokemon with ice, water, and pychic attacks. because the gym uses ground, posion, rock, and fighting type Pokemon.
If you mean the 8th gym leader, you have to first go to Saffron City, and beat the guy in the biggist tower there. Afterwards, go back to Viridian City, go into the gym, and he will be there!!!
you need to beat the 8 gym leaders
Veridian city the gym leader id Giovanni
geovanni is the gym leader hes easy to beat if u have water Pokemon
The eighth gym leader is in the underwater city(forget the name) but it is where you fight groudon. after you beat him the gym should be open.
all you have to do is beat the 7th gym and then walk in side beat all the trainers come outside buy potions go back inside and battle the gym leader.
you go to the 7th gym leader (in the seafoam islands) and after yu beat him you go back to cinnabar island and blue will say you are ready to fight him p.s. the 7th gym leader is fire type
go right from the seventh gym leader
actually there isn't 9 gym leader there is only 8 like the other ones. Actually, the 9th gym leader in heartgold and soulsilver would be the first gym leader in Kanto after you beat the elite four the first time, you can face the kanto gym leaders in any order.
There are 8 gym leaders, you have to specify which Gym leader you're talking about. If you beat the 1st one, you have to travel east until you reach a cave called MT. Moon.
beat her and then go to dragons den behind the gym. talk to the elder and answer some questions. once you've answered all of them the gym leader will come up and give you the badge.
Well it depends if you beat any gym leader accept number 8 them go through the different towns and look for gyms you have not gone to.If you did beat fthe 8th gym leader go to the little sandy spot by I belive the seals place use surf and then you are on your way to the elite four.