One of the longest-standing Mysteries of the Pokémon universe revolves around the rock ground-type, Diglett. Diglett is known for burrowing underground like a mole and evolving into Dugtrio ...

Diglett and Dugtrio were among the 18 Gen-1 Pokemon to receive this honor initially, adding Steel to their Ground-typing and resulting in golden locks springing forth from Dugtrio's heads ...