First activate the cheat gnome. Then Cheat Gnome appears at different locations, depending on which islands. Find the Cheat Gnome, then enter one of the following codes to unlock the corresponding option on the Cheat Gnome. To use the Cheat Gnome, approach it and press X.

Code	Effect
Press L, R, Up, X, R	Cheat Gnome.
Quickly press Square(4), L	Maximum current food and resources
Quickly press Square, Triangle, R, Down(2), Up	Unlock all crafting resources.
Quickly press X, R, X, R, X	All plans