Acoustic Blaster

Acoustic Blaster is the Special Weapon used by the Roboticized Master Vector Man in the crossover Worlds Collide. After subduing Vector Man and restoring him to his original identity, Vector the Crocodile, Mega Man copied the Acoustic Blaster and then proceeded to use it on Charmy Man, significantly weakening him due to it being Charmy Man's weakness. Mega Man later tried using it on Knuckles Man, but the Roboticized Master shattered it with a single punch.