They are weird creepy faces that roam around in the Backrooms. Burps also somehow do attacks, since Mario was able to burp one away. Like Goombas for example, they come in all different sizes. The larger one is, the tougher they will be. These enemies are very weak as Mario and Spigi only needed to one punch each one they saw. A giant one however. A one punch did not work. Luigi came in with a couple spin punches to take him out.