Drayden

Drayden (Japanese: シャガ Shaga) is the eighth and final Gym Leader in the Pokémon Black version only. His gym is in Opelucid City in the Unova region. Drayden specializes in Dragon-Type Pokémon. He will award the player the Legend Badge if the player defeats him. He is also the mayor of Opelucid City. However, in White, he allows Iris to battle you in his place for the Legend Badge.