To allow the player access to the underground plant, Wattson gives the player the Basement Key, which opens the door to New Mauville permanently. He requests that the player shut down the generator in New Mauville as a safety precaution. In Pokémon Ruby, Sapphire, and Emerald, Wattson stands at the intersection of Route 110 and Route 118 after the player earns the Balance Badge.
3.1 Pokémon Ruby, Sapphire, and Emerald.
