Is Alolan Marowak based off the Ghost Marowak in RBY?
[MILDLY IRRELEVANT] You find out that Team Rocket tries to steal the skulls of Cubones to sell them for large amounts of money. In one attempt, a Cubone was saved by its mother. The Cubone escaped, but its mother dies :c and that is the ghost.
Alolan Marowak was based off of the ghost.