Dust Crusher

Dust Crusher (ダストクラッシャー) is Dust Man's Special Weapon. It sends a ball of debris that can also split into four pieces (diagonally) when it hits something solid.

Robot Masters And Bosses Weak Against Dust Crusher/Crasher

 * Skull Man: Mega Man 4 and Mega Man IV
 * Dive Man: Mega Man 4 and Mega Man IV
 * Square Machine: Mega Man 4
 * Magnet Man: Mega Man: The Power Battle
 * Wily Machine: Mega Man: The Power Battle

Trivia

 * The Dust Crusher is called Dust Crasher in Mega Man: The Power Battle.