>>36761240So in Gen4 they had this thing called the Underground, which was basically the secret bases from R/S/E but with a mining minigame that let you get fossils and "gems" (revives, star pieces, pearls, big pearls, etc...). If you interacted with 20 other people in the Underground then you could interact with this Odd Keystone and encounter a Spiritomb!
It's ghost/dark and pretty bulky, at least was back then before powercreep.
