Pokémon - Season 16 Episode 4

The gang arrives in Opelucid City for Iris' scheduled rematch against the Dragon Master and Gym Leader Drayden, who handed her and Excadrill their first-ever defeat years ago. Upon arrival, Iris remembers her difficult time in going to school there and trying to adjust to urban life. She and the others then travel to the Opelucid Gym for her rematch with Drayden, where she puts her Excadrill and Dragonite to the test, respectively, against Drayden's Haxorus and Druddigon in order for him to evaluate her training and skills.