These codes can be enabled only after you press L, R, Up, A, Z while playing. Now you can enter one of the codes below and don't forget to follow the instructions:
9,999 Simoleons: R, L, Z, Right, Left (Cheat Trophy -> then Interaction/Location -> Give Simoleons)
All locations: X, B, Left, X, Up, X (Cheat Trophy -> Interaction/Location -> Unlock/Unlock All Locations)
All objects: B, X, Down, Left, Up
All recipes: Z, B, Up, Down, Right, A
All fashions: B, Z, Down, Right, B
Full motives: Up, X, Up, Right, B (Cheat Trophy)
Set Skill level: Y, X, B, Z, Left (Cheat Trophy -> Interaction/Location -> Change Skill - [name]/Change to [number])
Advance time by 6 hours: X, B, L, Up, Down (Cheat Trophy -> Interaction/Location -> Advance 6 Hours)
Horn audio: R, L, R, L, Y