The Met Daddy is a giant Metall robot and the first boss of Dr. Wily's castle in Mega Man 4. It attacks by stomping left and right and by jumping. When it lands, the ground shakes and four normal Mets will drop down from the ceiling. Met Daddy is vulnerable to the Ring Boomerang and the Dust Crusher, though like normal Mets it can hide under its indestructible helmet.
A robot similar to the Met Daddy - called the Powmettaur - appears in Megaman ZX on the Nintendo DS. It serves as a mini-boss and attacks in the same manner as Met Daddy.