Shadow Bone does damage and has a 20% chance of lowering the target's Defense stat by one stage.
Generation VIII
Pokémon Sword and Shield
In Versions 1.0 to 1.1.1 of Pokémon Sword and Shield, Shadow Bone could not be selected in a battle, as no Pokémon available in the game could learn it. Starting with Version 1.2.0, it can be selected and functions as it did in the previous generation.
Bold indicates a Pokémon gains STAB from this move. Italics indicates a Pokémon whose Evolution or alternate form receives STAB from this move. A dash (−) indicates a Pokémon cannot learn the move by the designated method. An empty cell indicates a Pokémon that is unavailable in that game/generation.
Alolan Marowak spins its bone, with a purple flame gathering around one of the ends and a blue aura briefly flashing inside the center. It then stops spinning and strikes the opponent with the bone, creating a burst of both purple and blue flames once it makes contact.