Cubone

“Because it never removes its skull helmet, no one has ever seen this POKéMON's real face.”

— Pokémon Red

“Wears the skull of its deceased mother. Its cries echo inside the skull and come out as a sad melody.”

— Pokémon Yellow

“If it is sad or lonely, the skull it wears shakes, and emits a plain­ tive and mournful sound.”

— Pokémon Gold