A Keckleon is blocking your way. You need a SILPHSCOPE to reveal it's identity.
at his gym, waiting for you to challenge him.
The first city you go, that has a gym... i believe its called... Petalburg city
the 6th gym is in canalacve city
The 6th gym is in Saffron City the gym leader is Sabrina she uses Psychic type pokemon.
The 6th gym leader is in Fortree City.
The 6th gym leader is in Canalave City.
the gym is in fortree city and it is flying type gym
You go to the 6th gym.
The 6th Gym Leader in Pearl is Byron who is in Canalave City.
beat pokemon gym leader clay,take on route 6, go through chargestone cave,then you'll be at the 6th gym.
sixth gym laeder
The 6th Gym Leader In Pokemon Ruby Destiny is in Down Pour City