Cannon Pig
From the Super Mario Wiki
Cannon Pigs are pig enemies found in Super Mario Land 2: Six Golden Coins. They are most common in Mario Zone, where they can be found in Mario's hat and Mario's belly. They would also seem to populate the Moon, as well as other parts of Space Zone. Cannon Pigs shoot cannonballs (as their name would imply); they therefore serve the same purpose as Cannons. They can shoot cannonballs horizontally or diagonally. Mario could easily avoid these cannonballs by jumping on them, jumping over them, or running under them. Cannon Pigs could be defeated with a jump or the toss of a fireball. Three different colors of Cannon Pig exist, though the colors make no difference in strength.
