From the Super Mario Wiki
J Son is an enemy in Super Mario Land 2: 6 Golden Coins's Pumpkin Zone. It is a walking hockey mask with a dagger stuck in it, a reference to Jason Voorhees, the main antagonist of the Friday the 13th film series. This enemy's attack manner is similar to a Goomba's, although stomping J Son will propel Mario upward, whereas Goombas give Mario no extra propulsion upon being jumped on.
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