Cheat gnome
Pause the game and quickly press L, Black, Right, X, Left. If you entered the code correctly, a Sim voice will say something. A blue gnome should appear near the house that your Sim is at. Your Sim will get a phone call each day to receive Simoleons. This will also happen if they are visiting another house, except for Mom's. In order to get the Simoleons there, force the Sim that is hosting you as a visitor to answer the phone by walking near it.

All objects
Enable the "Cheat gnome" code. Pause the game and quickly press Black, Up, Y, Down, R to unlock all objects. If you entered the code correctly, a Sim voice will say something. To disable this code, pause the game and quickly press R, Down, Y, Up, Black.

All visit locations
Enable the "Cheat gnome" code. Pause the game and quickly press Black, Down, R, L, Down, Y to unlock all visit locations. If you entered the code correctly, a Sim voice will say something. Note: This code can be entered any time after your Sim wakes up at Mom's House after the initial "Dream Sequence". To disable this code, pause the game and quickly press Y, Down, L, R, Down, Black.

All socials
Enable the "Cheat gnome" code. Pause the game and quickly press L, R, A, Down, Black to unlock all socials. If you entered the code correctly, a Sim voice will say something. To disable this code, pause the game and quickly press Black, Down, A, R, L.

Team picture
Enable the "Cheat gnome" code. Pause the game and quickly press R, Black, Down. If you entered the code correctly, a Sim voice will say something. To disable this code, pause the game and quickly press Down, Black, R.