DK64 has always had a mysterious connection to Stop 'n' Swop. In our DK64/BK SNS Special, we broke a revolutionary news story about Stop 'n' Swop originally not being between BK and BT, but BK and DK64! In that special, we also revealed that the words "Ice Key" appeared in the menu, and that we had a strong belief that the ice key would've unlocked an ice door in Crystal Caves.
Runehero, of the RWP forums has gotten the Ice Key menu item to appear in-game. The curious part is that once placed in-game, the default value for the Ice Key is 1/1, not the expected 0/1. If you want more technical information about it, take a look at the forum post. Also, the ice key picture has not yet been discovered in DK64, so the image in the menu is not the correct image (boss key).
