Avid Pokemon TCG Card collector.
It's more like recklessly fighting up close with body limbs or anything useable.The move never specifies you need fists. Falinks, Arrokuda, Sharpedo, Xerneas, Honedge and even other birds like Unovan Braviary can all learn the move. The move states "the user fights the foe in close without guarding itself. It also cuts the user's Defense and Sp. Def.". In the anime Staraptor repeatedly kicks, pecks, and hits the opponent with its wings at a fast speed. It requires some form of physicality but its less specific.