Grand Cannon

Grand Cannon (グランドキャノン) is a cannon enemy from Mega Man Zero 3 that looks like an igloo, as it was made specially for frozen terrain. It shoots energy spheres at various angles, and appears in the Derelict Spacecraft  and Frontline Ice Base stages.

Trivia

 * Early in the game design, Grand Cannon is called "Eskimo Cannon" (エスキモー砲台), as shown in sketches of Rockman Zero Official Complete Works, and would appear with an unused Yeti sub-boss.