Metal Blade

Metal-Blade (メタルブレード) is Metal Man's Special Weapon. It's the strongest weapon from Mega Man 2, as Bubble Man, Flash Man and even Metal Man himself are weak to this weapon. It can be thrown in eight directions and uses barely any energy, consuming 1 energy for every four Metal Blades (a total of, without recharge, 112 blades in Mega Man 2 and 76 in Mega Man II).

The Doc Robot from Mega Man 3 also used this weapon along with the weapons from the other Robot Masters in Mega Man 2, but the player can't take it from Doc Robot. The only difference with the original is that Doc Robot's Metal Blades are orange, but the color is the same of Metal Man's blades in Mega Man: The Wily Wars.

The Metal Blade was also used in the Mega Man cartoon series and in the cartoon Captain N: The Game Master.

Robot Masters And Bosses Immune To Metal-Blade

 * Alien: Mega Man 2
 * Quick Man: Mega Man 2
 * Mega Water. S: Mega Man: The Wily Wars
 * Mach-Ball: Mega Man: The Wily Wars
 * Wily Machine 1: Mega Man: The Wily Wars

Trivia

 * Metal Blade with a hyphen is used as the English name in Mega Man 2 and Mega Man: The Wily Wars, while without hyphen is in Mega Man II and Mega Man: Anniversary Collection.