To spawn the Cheat Gnome, while on a lot press B, Z, Up, Down, B. You must then search for the Cheat Gnome on the island. After finding the Cheat Gnome, the following cheats can be activated by pressing the corresponding sequences of buttons:
All motives - Minus, Plus, Z, Z, A. All plans - Plus, Plus, Minus, Minus, Z. All crafting resources - A, A, Down, Down, A. Max food/resources - Left, Right, Left, right, A. Max relationships - Z, Plus, A, B, 2. +1 skill - 2, Up, Right, Z, Right.