Pretty Stone

The Pretty Stone is a Rare item in Golden Sun: The Lost Age, and part of the trading sequence that will allow you access to the optional dungeon Islet Cave in the Sea of Time Islet. It is in the possession of the penguins, Pengus and Pengulina, at E Tundaria Islet, and they will give it to you if you move the injured Pengulina across the pond. The Pretty stone is then traded for the Red Handkerchief at SE Angara Islet.