Once you have all five, merge them together to reveal a 6th island (Skullduggery) at the bottom center of the map, near the Pirate Outpost. You cannot do anything there until you get the largest ship and can defeat Captain Crawfish.
Once you defeat Captain Crawfish in battle, take the map to the Governor and he will give you the Buried Treasure location and the Bone Shovel. Now you can dig up the treasure on Skullduggery.
there is actually pieces of the map that you get on the ports but there is a puzzle you have to do to get them
There is a dock at the bottom side of the small island, Skullduggery. The island appears when you have collected all 5 of the pieces of the Treasure Map.
I wish i knew. hmm
The treasure is on a secret island which is revealed after you find all pieces of the map, called Skullduggery. But I don't know how to get it yet.
Collect the five map pieces (one on each of the trading islands) and join them to see the sixth island, Skullduggery. Once it appears on the map, you can actually go there, but nothing happens there until the end of the game. (see the related question)
It is the sixth, small island that is foggy. It is the real "Skullduggery island". It is just southeast (down and right) from the Pirate Outpost, and directly west (left) of Golden Harbor. It will appear on the map formed when you collect all five map pieces. (see related question)
The 5 pieces of the treasure map reveal another small island (Skullduggery) where a secret treasure is buried. Once you get rid of Captain Crawfish, it will be safe for the villagers to recover it, and the Governor will send you to dig it up.
Once you have all 5 map pieces, the new island (Skullduggery) appears near the Pirate Outpost. But there is nothing you can do there until you acquire a Phoenix Warbird and defeat Captain Crawfish in battle. Once that is done, return to the governor in Fort Ridley and he will give you the map to the treasure on Skullduggery, and a shovel to dig it up.
The small island (Skullduggery Island) appears once you have all of the map pieces, and view them together. However, you can't do anything there until you have beaten Captain Crawfish. Once you have, see the governor to get the location of the treasure. You can then travel to the island to dig it up.
when you have all the pieces of the map put them together and it will show you the hidden island then you have to go get a shovel to dig up the treasure with i haven't found yet
It is on the 6th outlying island (Skullduggery) which only appears when you have assembled the 5 pieces of the map. Once you have the map, and have defeated Captain Crawfish in battle, the Governor will give you the Treasure Location card and a bone shovel. Then you can dig up the treasure on the mysterious island.
Collect the 5 map pieces, one from each of the trading islands, and the hidden island will appear on the map. You cannot do anything there until you have defeated Captain Crawfish.