Scoff is a large, blue hippopotamus.
Scoff is always seen with Troff inside of a special gate that always lead to bosses holding the Boss Key. However, in order to get to the boss, the Kongs must feed Scoff bananas to fill him up. Scoff will then slam down on his platform to raise up Troff to the large lock. Once Scoff has been fed the amount of bananas (it depends on each world), then he will raise Troff enough for him to unlock the door.