The Opelucid City Gym is the final Gym to be challenged in the Unovaregion. Unlike most games, this Gym has two different Gym Leaders, but it is dependant on which version you, the player, have. In Pokémon Black version, the Trainer has to battle Drayden, the Mayor of Opelucid City. On the other hand, in Pokémon White Version, the Trainer alternatively has to battle Iris. Both speialize in Dragon-type Pokémon, and so do their Gym Trainers.