Block Dropper is Block Man's Special Weapon. When he acquires it, Mega Man can spawn four stone blocks in the air that will fall and crush enemies beneath them.
If Mega Man uses Block Dropper in tandem with the Power Gear, the weapon will instead spawn a whole maelstrom of blocks, making for far greater destruction to enemies.
Block Dropper changes Mega Man's appearances rather than being a color swap seen from previous classic Mega Man installments. In this case, Mega Man's left arm and helmet visor are covered in bricks.