It is with good reason that biological evolution has largely separated the ear, the eye, and the mouth; it is difficult to converse or sense danger when any overlap leaves one deaf, blind, or both. Roggenrola, however, are a mineral pokemon, produced not by evolution but by some still poorly-understood geologic process, or simply unchanged from the initial form imagined by the cruel or ill-conceived creative impulse of the gods. This single-opening face makes communication extraordinarily difficult for these pokemon, and Roggenrola are said to envy even the Zubat, whose blindness will soon be erased by maturity.
To the Roggenrola, on the other hand, time produces little but erosion; carbon dating has revealed more than a few individuals who lived for billions of years without becoming a Boldore. This is not an inherent characteristic of rock pokemon; Geodude may live long lifespans, for instance, but if they seek out power, their sturdy bodies will ensure that they can eventually become Graveler. Many Roggenrola – inevitably the younger ones – undergo the same process, and today comprise the world's population of wild Boldore. But up to half of all Roggenrola alive today contain heavy concentrations of everstone within their bodies, which require the concentration and functional hands of a trainer to separate out; otherwise, no matter how many battles they win, these Roggenrola will never be able to evolve.
A large proportion of wild pokemon – and for that matter, most humans – see humanity as created to be a supreme species, destined to rule over others. To some pokemon, this is seen as a divine curse leading inevitably to their extinction; to others, this is a grand opportunity. Roggenrola, and communities which mine everstone from them, instead consider humanity's creation an act of long-awaited divine mercy.