Metal Blade

Metal Blade (メタルブレード), written as Metal-Blade in some games is Metal Man's Special Weapon. It's a metal saw blade that can thrown. 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's also Wood Man's weakness in Mega Man II. Air Man, Crash Man, and Quick Man are immune to the Metal Blade. 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.

The Metal Blade makes a return appearance in Mega Man Universe. Metal Man is also making a return, possibly meaning that you will have to defeat him again in order to obtain the Metal Blade.

Damage Data Chart
Known damage values in units for Mega Man 2.

Bosses Immune To Metal-Blade

 * Alien: Mega Man 2
 * Quick Man: Mega Man 2
 * Air Man: Mega Man 2 and Mega Man II
 * Crash Man: Mega Man 2 and Mega Man II
 * Mecha Dragon: Mega Man 2
 * Guts-Dozer: Mega Man 2
 * Buebeam Trap: Mega Man 2
 * Top Man: Mega Man II
 * Needle Man: Mega Man II
 * Wily Machine: Mega Man II
 * Mega Water. S: Mega Man: The Wily Wars
 * Iron Ball: Mega Man: The Wily Wars
 * Wily Machine (form 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.
 * There is a glitch that permits Metal Blade to be used infinitely.
 * Ironically, the weapon does more damage to Metal Man himself than any other Robot Master in the game. During the second Robot Master battles in Wily's Fortress, Metal Man can be defeated with only two blades.
 * The Metal Blade could also be frozen stationary if you press Up, Down, and the fire button at the same time, but, as long as you are on the same screen as the frozen blade, you can only shoot either 2, 1, or 0, for example, if you freeze 1 blade, you can only shoot 2 instead of 3, if you freeze 2, you can only shoot 1 instead of 2, and if you freeze 3 of the blades, you can't shoot at all.
 * Mega Man 10's Wheel Cutter looks similar, especially when comparing game sprites.