in blackthorn city.
The eighth gym leader still awaits, as well as the whole of Kanto.
Blue (The eighth gym leader) is waiting on Cinnabar. He won't battle you unless you've beat the rest of the gym leaders
The eighth gym leader is Claire in Blackthorn City
The third gym leader is Whitney.
The eighth gym leader is in Viridian City. It is the team rocket's leader!
it depends............................WHICH GAME??!!??!!
The final gym is the Viridian City Gym. Blue is the Gym leader.
Not enough info: which gym leader?
Gym Leader Blue
You have to beat team rocket
All you have to do is get to Viridian City.
The 8th gym leader is in Viridian City.