It is called the Lonely Pokémon because of its tendency to keep to itself and avoid sociality. It was apparently traumatized by the death of its mother, and has now entirely removed itself from society. Cubone will often weep at night in mourning of its mother. When Cubone cries, the skull that it wears on its head vibrates and emits “a plaintive and mournful sound.” On the night of a full moon, the cries are said to be especially terrible. Cubone seems to recognize its mother in the moon, and so it howls with a particular sadness.
Cubone will only spawn on grass in desert biomes. Because there is not much grass in desert biomes, it can often be hard to come by.
Currently, Bonemerang, a move which Cubone learns at level 21, will always hit 0 times. Normally the move should hit two times, with a power of 50 for each hit. This bug also applies to other double hitting moves, like Double Kick.