Bananas () are the main currency in Ook. Bananas can be acquired in many ways, such as chest and quest rewards, barrels, and floating around trails. Occasionally, a "banana cluster" can be found, usually in a difficult-to-reach are that requires co-op, a pet, or a combination of planning and skill. Bananas are mainly used as the average monkey's main way to purchase items, such as supplies or weapons. They can also be used in player-to-player item trades in order to sweeten a deal. All vendors accept bananas for their wares, although the higher-end, stronger, or "endgame" weapons, supplies, and armor found in the NC Mall must be purchased using Nick Cash, or NC.