- Lowers damaging Rock-type moves' energy cost by 1%. Makes Hidden Power Rock-type.
A dark brown stone tablet infused with the power of bedrock. Pokémon holding this item use 1% less energy to use damaging Rock-type attacks. That Pokémon's Hidden Power attack becomes Rock-type for as long as the plate is in its possession. If the plate should be removed, Hidden Power's type is randomized for the remainder of the battle.