To get in the 8th gym you have to go find the gym leader in the light house.
The eighth gym leader is Claire in Blackthorn City
it depends............................WHICH GAME??!!??!!
The eighth gym leader is in Viridian City. It is the team rocket's leader!
Defeat the eighth gym leader.
After the eighth gym? Or after Pokemon league? well, for eighth gym, i recommend.. I got nothing, but for after Pokemon leagu, they give little exp, so Red.
sunnyshore city
you can get to the 8th gym after you defeat team galactic and defeated 7th gym.
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.
Viridian City.
in sootoplis
Sotololips City
sunyshore city dudes