There is a glitch that allows you to take Fucko to the Western Island with you. Get on the ship and sail to the crossroad between Shiptown, Nick's Home and Pine Island (the red dot in the middle). Then use the mouse and click on the dock of Shiptown. The game will ask you if you wanna go to Shiptown, and if you pick "yes", you will spawn at the harbor as a tiny ship. However, pressing Enter will cause the group of four to leave the ship, and you can now walk around the Western Island as you wish. To fix this glitch, all you need to do is talk to Dolpho, who will then port you back to the ocean like nothing happened.
That way, you can use Fucko to farm on the Western Island as well. The glitch only works in the public version though, in the Patreon version it's already been fixed.