Huge Treasure Chest Key

The Huge Treasure Chest Key (also called the huge treasure box key, giant key, or Giant Treasure Chest Key ) is a key that Wario needs to unlock the huge treasure chest in which the Black Jewel has locked itself in Wario World. The Huge Treasure Chest Key has four pieces, which Wario needs to collect. He receives a piece of it after defeating each of the major world bosses: DinoMighty, Dual Dragon, Red-Brief J, and Captain Skull. Each piece is designed after the respective boss from whom it is received.