A Goomba is a recurring enemy in the Mario series. They debuted in Super Mario Bros. and are depicted as brown mushroom-like creatures with legs. Goombas have bushy eyebrows and a pair of fangs sprouting from their lower jaw. They generally tackle or bite an enemy. The Goombas once lived in peace in the Mushroom Kingdom, but they later joined the Koopa Troop. The Goombas are also probably the most common enemy in the entire Mario series, and they are also the weakest. Their leader is known as Goomboss.