L. Knuckle (エル・ナックル Eru ・ Nakkuru?) and R. Knuckle (アール・ナックル Āru ・ Nakkuru?) are two giant knuckle bosses from Mega Man V fought in the Wily Star before Dr. Wily. Mega Man first fights against the left knuckle, which moves above the screen and tries to punch Mega Man, causing the floor to shake. Its weak points are its eyes. After Mega Man defeats it, the right knuckle appears. R. Knuckle has the same attacks as L. Knuckle, but it moves faster and can also attack with homing missiles and catch Mega Man. You can use Salt Water on them. It is their weakness and you can hit them easier if you use it directly. But it won't be enough to dispatch both Knuckles, so consider using the Grab Buster on the R. Knuckle to restore lost energy on the first battle and decently damage it.