Marowak, known as the Bone Keeper Pokémon, is a portmanteau of marrow and whack (to strike), with "marrow" referring to the bone marrow within Marowak's skull-like head and wielded bone, and "whack" to represent Marowak's nature of striking its opponent with bones. Its Japanese name most likely refers to がらがら garagara, the onomatopoeia for "clattering," as in of bones. A Marowak is, in essence, a larger, fiercer, more savage Cubone. Unlike its pre-evolutionary form, a Marowak's skull helmet is tightly fitted over its face, making removal more futile than it is with a Cubone. It's also more adept at using its bone club in attacks, and, most importantly, it no longer mourns over the loss of its mother, abandoning its plaintative and sorrowful spirit for one that can't be broken, no matter how many times it's been defeated. Where a Marowak collects its bones to use as weapons is a mystery, and, somewhere in the Pokémon world, there exists a graveyard where Marowaks are laid to rest.