Test your Mario Pig Trivia.  If you get one of these correct, you must buy this pig.

In Super Mario Land 2: Six Golden Coins bosses known as The Three Little Pigheads, parody the story of The Three Little Pigs.

Super Mario Land 2 also featured a Pig sub-species known as the Cannon Pig.

A strange, hog-like creature named Hoggus appears in Wario Land 4; Hoggus could even make Pigs appear by sketching them on his pad