An Auto-Snifit is a new species of Snifit, and it only appears in a few of Mushroom Kingdom Fusion's levels. It is colored green, strangely.
Unlike red, blue, and gray Snifits, Auto-Snifits are semi-common and do not shoot cannonballs from their mouth. All turn around when they touch a platform's edge. If you land on one, it will get knocked out and you can use one as a weapon! This is why they all save their ammo stocks.