This section temporarily contains information copied directly from Bulbapedia, and needs to be rewritten so not to be classified as plagiarism.
Marowak is a bipedal Pokémon with a spike located on its tail. On its stomach, Marowak is very light brown in color, as opposed to most its body, which is a darker brown. Two small claws, one on each hand, serve as its thumbs, and two large nails make up its toes. Marowak’s head is composed of the skull it once wore as a mask. It can no longer remove the skull, as it is now a direct body part. Marowak’s jaw is composed of bone, and its nostrils are located on the nose of the skull. Its triangular eyes are brown and are also located on the skull. Marowak is well known for ferocity with its bone club, which it is said to collect from a hidden graveyard. It and its pre-evolution, Cubone, are the only known Pokémon that can learn Bone Club and Bonemerang.
Upon evolution, Marowak has overcome the grief of its mother's passing. Now ferocious and violent, Marowak is an adept combatant, and uses the bone it carries as a weapon and a boomerang. Marowak have also been recorded pounding on boulders with the bone club it carries in order to tap out messages to others. It lives in mountains to test its skills.