Masked Ghouls[1] are enemies in Super Mario Land 2: 6 Golden Coins's Pumpkin Zone. They are walking hockey masks with dagger stuck in them, 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 unlike Goombas, stomping Masked Ghoul propels Mario upward.
Super Mario-Kun, volume 8.
Super Mario Land 2: Six Golden Coins