BW063: Battling the King of the Mines!

Episode Plot
Once again, the time has finally come. After being denied twice, Ash finally gets his Gym Battle with Clay. As a surprise the Gym battlefield is located underground. Can Ash be able to beat the Gym Leader who calls himself the "Mining King"? And what is up with Roggenrola?

Trivia

 * The Japanese version of "Who's that Pokémon?" returns.