Search for treasure in the underwater world! Use LEGO Mario, LEGO Luigi or LEGO Peach (figures not included) to walk a Dorrie and explore the shipwreck. Oh no! The treasure chest is locked, you need to find the key. Look under the ship's mast, but don't get crushed by the Cheep Chomp! Rotate the platform to open the shell and reveal the Key Block. Open the treasure chest and receive the jewel!