The gym is in blackthorn city go west then north
The 5th gym leader in Johto is Chuck. He is located in Cianwood City.
The eighth gym leader is Claire in Blackthorn City
The eighth gym leader is in Viridian City. It is the team rocket's leader!
You need to go to Goldenrod city and stop team rocket in the radio tower and that guy should let you go!
You have to beat team rocket
it depends............................WHICH GAME??!!??!!
The 8th gym leader is in Viridian City.
Bugsy in Azaelea town!
Defeat the eighth gym leader.
The eighth Gym Leader, Juan, can be found in the Sootopolis City Gym after you have dealt with Teams Aqua and Magma. He trains Water-type Pokémon.
The 8th gym leader is in sunny shore city
You have to face the Elite 4 after you beat the eighth gym leader. The game gets a little better & less boring when you do.