Pump Cannon

Pump Cannon (ポンプキャノン) is an enemy from Mega Man ZX Advent. It is of a small Mechaniloid with a spring that is constantly jumping up and down on top of a wide servo-type cannon. The cannon is activated when the Mechaniloid jumps on it, firing a short ranged sonic blast. It is optional to destroy the Mechaniloid first, but the player can use the cannon to destroy other nearby enemies.