Hard Knuckle is a weapon you get from Hard Man in Mega Man 3. It is my 7th favorite Mega Man weapon.
About Hard Knuckle: Edit
Hard Knuckle is a releasable fist that can change the direction. It is used to break blocks, so it is considered a bomb weapon. But I still like Commando Bomb better.
Hard Knuckle and Mega Man 3 Bosses: Edit
Top Man and Yellow Devil MK-ll are both weak to this weapon, along with Doc Robots Metal Man and Crash Man. However, Needle Man, Doc Robot Flash Man and the 2nd phase of Gamma are immune to this weapon.