The crater-marked surface of the Moon can be fairly described as the birthplace of Lunatone, for every time a large enough rock is sent hurtling down to Earth, a Lunatone is born. These pokemon by themselves can not make Clefairy or other lunar pokemon evolve, for they are too large, but when sufficiently sized pebbles break off from them – either in battle, or in the case of some unscrupulous trainers, by chiseling off pieces in their sleep – usable moon stones are created.
Yet Lunatone possess far more lunar magic than simply the power to induce evolution. They can levitate like many lightweight ghosts despite being made of solid rock. They can impact the flow of water like their birthplace directs the tides, so they are often paired with water types in double battles and are used during hurricanes to delay flooding until they are inevitably knocked out by the heavy rains. During a crescent moon, they can heal the sick; during a full moon, pokemon who battle them mysteriously find that their items simply no longer work. And during a new moon, many trainers cease their travels in a frantic search for their Lunatone, who turned invisible at the same time as its celestial parent, only to find them in their pokeballs or drifting around their heads the moment the moon can be seen from Earth once more.
Interestingly, many of the feats which Lunatone perform today are weaker versions of those ascribed in myth to the moon goddess Cresselia. Perhaps the legend of Cresselia was simply how travelers from Sinnoh described and embellished tales of Hoenn's Lunatone. Or perhaps it is that Cresselia imbued the Moon itself with the powers which its fragments, the Lunatone, have maintained to this day.