you have you find the secret key in the Pokemon mansion.
go up the first stairs,press the secret switch on the statue next to the stairs,go up the stairs on the top left of the level you are on,press the secret switch,go through doorway that just opened,go down the first drop off to your left of the scientist,go down the first stairs you see,press the secret switch,go through the door you opened and past the scientist and press the next secret switch,keep going to your left and the pokeball on the table has the secret key.
go right from the seventh gym leader
The seventh gym leader is Candice, the Ice Type leader. She is at Snowpoint City.
The seventh gym leader
You have to fight the fire gym leader which is located at cinnabar island. i dont know his name though
In the mahogany gym
There in the gym in mossdeep city by the way the gym leader are actually gym leaders.
You go on to defeat the eight gym leader.
figure it out yourselve
An old guy called Pryce, who specializes in ice pokemon.The seventh gym leader is Pryce in Mahogany town.
go and beat the 8th gym
pryce the ice type gym leader
The eighth gym leader still awaits, as well as the whole of Kanto.