In the cave at Sunny Peak, there is a pedestal with what looks like a sword in it. To lift the "sword," the player must find a red, blue, and green marble to place in the pedestal. This is most likely a reference to The Legend of Zelda: Ocarina of Time, in-which you have to do a similar thing to get the Master Sword. This is further backed up by having music similar to when you try picking up the Master Sword in A Link to the Past.