It is easy to get to Dragon Cove in Poptropica, Skullduggery. It is in the corner of the map. In the top right corner there is a little square that says "Map" and it has like 5 different places that...
Find a piece of the treasure map to the treasure island by jumping on the stone fishe's head...get the stick/mallet...push the box the fishman is sitting on next to the gong...and then bang the gong...