Roggenrola

Roggenrola is a roughly spherical Pokémon discovered a century ago in an earthquake fissure. Its body is blue and covered in large, smooth facets. It has a hexagonal, yellow artifice in the center of its body, leading to a hexagonal opening that functions as an ear. Roggenrola has a brown, rocky oblong atop its head, and similar brown rocks that serve as feet. Its body houses an energy core; due to compression underground, both this core and Roggenrola's body are as hard as steel.

Roggenrola is born deep underground, and compares its hard body with that of Geodude and Carbink. As stated by Cilan in Where Did You Go, Audino?, Roggenrola has sensitive hearing and can hear sounds that are inaudible to humans. It tends to follow the sounds it picks up with its lone ear, panicking if these sounds cease.