There are N ordinary types of shops and N special types, distinguishable by the sign hanging above the door and by the message that appears when you enter the shop. Ordinary shops sell four items randomly selected from the shop's product line, whereas special shops offer certain services or unique items. Note that a shop will never sell the same item twice, besides ropes and bombs. Additionally, Mystery Boxes can spawn in all ordinary shops, even the shop in the tutorial, and might contain items inside that are duplicates of those in sale.