The
boss of the first
Dr. Wily stage in the original Mega Man and it's remake, Mega Man: Powered Up, though it also appears in other games. It attacks by turning parts of it's body into
yellow globs, then shooting them across the room, where they reform into the part of the body said glob was originally. It's weak
spot is it's red and black eye, which it can fire lasers from. Despite having a weakness to the Thunder Beam and a consistent pattern, it's considered one of the hardest bosses in the Mega Man series.