you need to get the pokeflute in lavender town and go to snorlax in front if Diglett cave east from vermillion city and use the pokegear and play the pokefluteuseing the radio by draging the beacon tothe upper part of the radio.
You go to Mistralton City
byron the sixth gym leader u fight him in canalave gym
Driftveil City. Gym Leader Clay!
After defeating the fifth gym leader, Clay, in Pokemon Black or White 2, and after heading to the World Tournament Towers at the bottom, head into the direction tot he left to the next route, and make ways into the Chargestone Cave. After making it through the cave, one will meet the sixth gym leader, Skyla.
In Fortree city. There will be an invisible Pokemon blocking the entrance, so you will need a Devon Scope (a device by Devon that signals any unseeable Pokémon) which will be a gift from Steven when you meet him on a wooden bridge on Route 120. ^_^
Cheren
The Sixth Gym leader is Chuck, he has a Hiryama and a Poliwrath.
sixth gym laeder
Step on the portals until you get to the gym leader.
The sixth gym is in Fuschia City, where you fight Koga, Poison type leader.
in canalava city
Ummm... Which Pokemon game?
One of your Pokemon has to learn surf.
You can only get the Sixth Badge from the Sixth gym leader. After defeating the Sixth gym leader, the gym leader will give you the Sixth Badge.
Sabrina, the psychic gym leader. She is located in Saffron City just after beating Koga, the fifth gym leader.
it is i n fortree city
Byron in Canalave City is the sixth gym leader in Pokemon Diamond. He specializes steel-type. His 3 pokemons are Bronzor, Steelix, and Bastiodon.
you stop playing Pokemon and get a life