Goomba

A Goomba is an enemy that is a brown mushroom with eyes, eye brows, feet, and a mouth with fangs in it. They attack by walking back and forth, which is a very offensive and defensive tactic found in many 2D platformers. In 3D shames they simply give chase, which isn't as scary as the one where they go back and forth. Goombas also have many sub-species.