viritien
You battle the 8th gym leader, Clair, at Blackthorn City.
Sootopolis City. The gym leader is Juan.
Go to Blackthorn city. The gym is there
hes in sootopolis city gym
The 8th and last gym is in Sunyshore City.
you just need to explore the upper floors of sunyshore city and voiala! you have the 8th gym
sootopolis city
viridian city
sootopilis city
The 8th gym leader is in Viridian City.
you go to blackthorne city and challenge the 8th gym there
Gym Leader Blue