He is at Sootopolis city...you can battle him only after the sootopolis incident
Sootopolis City. The gym leader is Juan.
hes in sootopolis city gym
its not joan and its juan. he is the 8th gym leader in emerald but in r/s its Wallace
Beat the 8th Gym leader.
Go to Sootopolis.
sootopolis city
sootopolis city
you beat this gym leader hope I helped
The only way to get a gym badge is to challenge the corresponding gym leader and win.
i go to mossdeep city
in the fortree city
you have to hit each tile once if you want to challenge the gym leader...