This is not really a code, but it is funny. You must have the Flippers and her necklace to do this. Go to the mermaid. Go right in front of her, and dive. She should swim to a diffrent spot. Do the same thing with the new spot, but this time swim to the original spot and dive. The mermaid shold come up in a third spot. Now give her the necklace. She will thank you, and then start jumping away on the land as if she were in the water! Very funny!