Ghost / Steel
The Pokemon raises the foe's PP usage, and lowers opponents base Def and Sp.Def by 1 stage.
It cannot be knocked out with one hit.
Rumor has it that this Pokemon was first created when a Steelix burrowing through the ground accidentally swallowed an Odd Keystone. This awoke the Spiritomb held within, which then proceeded to possess the Steelix, turning its body back into stone, but forcing a permanent Mega Evolved state.