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Banana Medals are collectible items in Donkey Kong 64 that a Kong obtains after collecting 75 Bananas of a corresponding color in the current world. Each Kong can obtain a Banana Medal in every world. There are a total of 40 Banana Medals, with eight for each Kong to obtain.
If the Kongs have at least 15 Banana Medals, then they can play a classic Rareware title from Cranky's Lab, Jetpac. Every Banana Medal is required for 101% completion, including the other 25 that serve no other purpose.