@BarryZanoneCan a Wild Shape Bear use Martial Arts after attacking with multi attack, provided it has its attack & bonus action still? i don't believe so – IIRC, claws/bite aren't equal to unarmed strikes
— Mike Mearls (@mikemearls) April 25, 2016
@BarryZanone going by what it says, “unarmed strike” and sanse a claw is unarmed atk I would think it would work with the bear claw/bite atk i believe the system treats claws/bites/etc as weapons
— Mike Mearls (@mikemearls) April 25, 2016
@BarryZanone at the very least, you'd have to use the listed damage for an unarmed attack
— Mike Mearls (@mikemearls) April 25, 2016
Pg 10-11 of the Monster Manual: …”where the “weapon” might be a manufactured item or a natural weapon, such as a claw or tail spike.”
A PC in a wildshape form would not be unarmed as they have natural weapons that qualify as their melee weapons.