Green Monster (グリーンモンスター) is an enemy from Ghosts 'n Goblins. These man-eating plants sprout from corpses and feed upon rotting flesh. Although they lack mobility, they can attack by spitting out eyeballs from their mouths.
They return in Ghouls 'n Ghosts as Green Monster MK2, enhanced by Cerberus to act as bodyguards. They appear stationed in front of the area leading to Cerberus' gate.