Pokemon Season 12 Episode 577 - Dealing With Defensive Types! Episode Title:Dealing with Defensive Types!.Episode Description:Ash's long awaited Gym Battle with Byron begins. Ash decides to use Chimchar, Buizel and Gliscor against Bronzor, Steelix and Bastiodon. He tries to dominate the battle with Fire attacks, but Byron's defence-oriented battling style prevents him from dealing much damage. His Chimchar eventually defeats Bronzor but Buizel quickly loses to Steelix. Ash uses Chimchar again against Steelix and triumphs, but next Byron uses Bastiodon and defeats Chimchar. Ash then uses Gliscor against Bastiodon, and after a tough battle, Ash and Gliscor emerge victorious, and are awarded the Mine Badge, Ash's 6th Sinnoh badge.