Sit on a bench at the town square and press X and Select 'Search Bench'. If you do this several times you will find the Monkey Paw (this will also work if you buy a sofa and select 'Search Sofa').

When you are at home or on a lot press L(2), R, X(2), Up and then enter one of the following codes to enable the corresponding effect in the game.

Pet Points:
Enable the 'Cheat Gnome' code and during gameplay press Triangle, Circle, X, Square, L, R. A 'Pet Points' option will then appear on the Cheat Gnome.

Advance Time 6 Hours:
Enable the 'Cheat Gnome' code and during gameplay press Up, Left, Down, Right, R. An option to advance time by six hours will now appear on the Cheat Gnome.

Get 10,000 Additional Simoleons:
Enable the 'Cheat Gnome' code and during gameplay press Up, Left, Down, Right, R. An option will then appear on the cheat gnome to advance time by six hours. Select the Cheat Gnome and then cancel the selection and press Up, Left, Down, Right, R again. A 'Give Sim Simoleons' option will now appear on screen.

Fully Upgrade Pet Emporium:
Enable the 'Cheat Gnome' code and during gameplay press Right, Down, Right, Up, Right, Down, Right, Up.