You Have to be on the emerald ocean, once you are. Do /tip Amatorio (the amount of dubs). You're doubloons will be doubled instantly. You can only do this in emerald ocean as of the advantages. You can do this as much as you want - ENJOY!
You earn doubloons on Skullduggery Island in two ways.
The first is by "salvage" when you come across random floating items in the sea. These are more numerous around sunken ships. Collecting them, however, is not without peril because sea monsters and pirate ships are more likely to attack the longer you spend away from an island. (see below for sinking sea creatures)
The second, which is ultimately more important, is by trading among the islands. You buy one of the four types of cargo with your doubloons, then carry them to another island to sell at a higher price. With larger ships, the amount of profit gets substantially larger. You can borrow money from the Golden Harbor Bank, but only an amount equal to your current worth, and it must be paid back with interest.
(The only action taken to enforce its repayment is that an overdue loan prevents you from buying a larger ship.)
The Circular Trading Route
Travel clockwise around the islands. Except for Parrot Port, one kind of cargo is always cheaper in a port. (The profit on goods from Parrot Port is comparatively small.)
Sea Monsters and Pirates
Sinking a sea monster or pirate is a good way to get a LOT of doubloons, but it is risky unless you are very good at it. You will lose some of your doubloons if you are sunk. Generally, the sea creatures attack at the left side and above Dragon Cove. So once you have 2 or more cannon, you can hunt them there. Note that smaller ships will fill the cargo completely with just one creature. Beware of multiple attacks by creatures and ships.
You get a sea monster to follow you and then crash them in to the rocks util they sink and you will get alot of cargo & doubloons
You can't.
You can get doubloons by sinking other ships, monsters and by selling cargo.
keep trading
the cannoneer is 20,000 doubloons.
you have to get doubloons by trading grain silk medicine and spice (go around all of the islands on skullduggery)
Earn 500,000 doubloons then get a loan at Golden Harbor at the bank .Or you can as many as Grains as you can then sell it at Pirate Outpost until you get 1,000,000 doubloons.
it costs 20,000 doubloons
It takes approximately 25-100 "days." Everytime you land is counted as a "day" in Skullduggery Island.
All you do there is to hire the Cargo Master, when you can afford him (salary 15,000 doubloons).
"Cash" on Skullduggery Island is your doubloon count. You earn doubloons by salvage or by trading, and you can borrow some from the Golden Harbor bank. When you buy cargo, you spend your cash, and when you sell it, you make a profit. If your ship is sunk, you lose aprt of your doubloons and part of your cargo. You need doubloons to buy larger ships and hire skilled crewmen. (see related question)
When you have enough doubloons, from salvage or trade, you can buy a larger ship at the Shipbuilder on Dragon Cove.
Usually Parrot Port, for between 32 and 40 doubloons.
You get a larger ship by having a lot of doubloons and then go to dragon cove and buy and new ship. Hint the cheapest ship is 3000 doubloons and the most expensive is more than 30000 doubloons.