At the main menu, select the "Edit Game" option, then select "File" then "Load". Your saved game files will appear. Press Circle, Up to highlight your memory card in the small box. Press X, then select the "Sample" option. Select the "Fu-Ma" sample game, then enter Circle, X, Up, Left, Down, Right, Square, Triangle as a password. You can now edit the Fu-Ma demo game.
When on test-play while making or editing a game, you can press Square to get as much money as desired, always win battles, or get any item.