Mysterious Man is a character from The Legend of Zelda: A Link Between Worlds. He said he was "trunking" through the woods and collapsed in that cave from exhaustion. He is in a cave in Lorule's Skull Woods and will offer to sell an item to Link without telling him what it is for 888 Rupees (a Golden Bee). He will praise Link for being no fool if Link declines the offer, or question Link's judgement for blindly accepting the offer.