BW085: Rocking the Virbank Gym! Part 1

Episode Plot
Ladies and gentlemen... ARE YOU READY TO ROCK?! BECAUSE THE TIME HAS COME FOR ASH'S FINAL GYM BATTLE AND IT'LL BLOW YOUR EARDRUMS AWAY!

Since the Gym in Opelucid City was closed, Ash had to use the Virbank City Gym as a substitute and here he meets the ultra-punky Roxie who has a Koffing, and her band, "Koffing and the Toxics." He find out soon enough that the Virbank Gym doubles as a live venue. With a loud Thunderbolt from Pikachu, Ash challenges the young Gym Leader to a Gym Battle in which she accepts with one condition: Ash will battle with a full team of six Pokémon while she uses only three. What Pokémon will this next generation Pretty Poison have up her sleeve?

Debuts
Humans
 * Roxie
 * Roo
 * Cook

Trivia

 * Prior to this episode, Ash swapped Oshawott, Snivy, Scraggy and Krokorok for Boldore, Unfezant, Leavanny and Palpitoad.
 * Roxie is the first Gym Leader who made her anime debut prior to the game she was in. (Pokémon Black 2 and Pokémon White 2)
 * There was a moment similar to IL014: Electric Shock Showdown where trainers were being beaten one after another by Roxie.
 * The effect of poison has the same visual as the effect of paralysis in the anime, only purple.
 * Apart from Pikachu and Meowth, Koffing is the first non Unova pokemon to appear physically in the Unova region
 * Who's that Pokemon?: Koffing (US).
 * This is the second time Koffing was featured in "Who's that Pokémon?" in the English version. The first time was way back in IL002: Pokémon Emergency!
 * Alyson Leigh Rosenfeld, who was a substitute voice for Jasmine, provides the voice for Roxie.
 * Despite that Ash had seen Koffing's before. This is the first time he pokedex'd a Koffing.