Because it never removes its skull helmet, no one has ever seen this Pokémon's real face.
Blue
Yellow
Wears the skull of its deceased mother. Its cries echo inside the skull and come out as a sad melody.
Gold
If it is sad or lonely, the skull it wears shakes, and emits a plaintive and mournful sound.
Silver
It always wears the skull of its dead mother, so no one has any idea what its hidden face looks like.
Crystal
It lost its mother after its birth. It wears its mother's skull, never revealing its true face.
Ruby
CUBONE pines for the mother it will never see again. Seeing a likeness of its mother in the full moon, it cries. The stains on the skull the POKéMON wears are made by the tears it sheds.
Sapphire
Emerald
It pines for the mother it will never see again. Seeing a likeness of its mother in the full moon, it cries. The stains on the skull it wears are from its tears.
FireRed
It wears the skull of its dead mother on its head. When it becomes lonesome, it is said to cry loudly.
LeafGreen
Because it never removes its skull helmet, no one has ever seen this Pokémon's real face.
Diamond
When it thinks of its dead mother, it cries. Its crying makes the skull it wears rattle hollowly.
Pearl
Stadium 1
Always wears the skull of its deceased mother on its head and never shows its face. It cries mournfully in the moonlight.
Stadium 2
If it is sad or lonely, the skull it wears shakes, and emits a plaintive and mournful sound.
