When engaging in battle, Donkey and Diddy can see Very Gnawty making small hops, slowly heading towards the two of them. In order for the two to attack, they must pounce on Very Gnawty's head. After each pounce, Very Gnawty becomes slightly more quick. Five pounces on him total defeats him and allows Donkey and Diddy to access Monkey Mines.
Very Gnawty's name is obviously a pun on the words Very and Naughty with Naughty being misspelled as Gnawty as Gnawty is a beavers and they gnaw.
The Gnawties in Donkey Kong 64 are about the same size as Very Gnawty. They also look the same, except for being in a blue coloration. Unlike Very Gnawty, they can be defeated by a single pounce instead of five.