Basement Key

The key to NEW MAUVILLE, which was constructed beneath MAUVILLE CITY.

Ruby

Mauville CityWattson

Wattson gives the Basement Key to New Mauville, then TM24 Thunderbolt once you shut the generator down.

Gift

Sapphire

Mauville CityWattson

Wattson gives the Basement Key to New Mauville, then TM24 Thunderbolt once you shut the generator down.

Gift

Emerald

Mauville CityWattson

Given up front. Opens the New Mauville generator door.

Gift