The Mirrored Element is a treasure in Pikmin 2. It is found in the fourth sublevel in the Dream Den, which is crawling with Armored Cannon Beetle Larvae and Anode Beetles. Use the Cannon Beetles to eliminate other Beetles and take out the remaining enemies with purples. The treasure may be near a poison pipe or some Anode Beetles. Take them out and take the treasure to the ship's pod. It is actually a silver dollar coin.