Cheat gnome
Quickly press Circle, L1, L2, R2, R1 during game play. The cheat
gnome will appear somewhere in the district.
Maximum Physical skill:
Enable the "Cheat gnome" code. Quickly press L1, R1, Down, X, L3
during game play.
Maximum Mental skill:
Enable the "Cheat gnome" code. Quickly press L1, R1, X, Circle, Up
during game play.
Maximum Artistic skill:
Enable the "Cheat gnome" code. Quickly press L3, R3, R1, R2, Circle
during game play.
Acquire skill object:
Enable the "Cheat gnome" code. Quickly press L1, R2, Right, Square,
L3 during game play.
Power Socials:
Enable the "Cheat gnome" code. Quickly press Triangle, R2, L1, X,
Square during game play.
Raise motives:
Enable the "Cheat gnome" code. Quickly press R2, L1, R1, L2, Left,
Circle during game play.

View development team
Enable the "Cheat gnome" code. Quickly press Up, Down, Circle, Up,
Down at the credits screen.

Raise Motives Cheat
Ok so its easy and I do it all the time
Step 1) Get the cheat gnome: Circle, L1, L2, R2, R1
Step 2) find the cheat gnome, now there sometimes in really weird places but easy to find but hard to find in cozmo street, diamond heights in diamond hights its floasting in fin air behind the V.I.P room and in cozmo street its at the end of the road outside the bartenders bar room.
Step 3) do the cheat: R2, L1, R1, L2, Left, Circle
Step 4) click on the gnome and select raise motives
easy peasy simple pimple

tip: If the cheat has worked you often hear a sigh or a bib, sometimes you have to do the cheat a couple of times before it works and you have to do it quickly without pauses!

Become Skyline Beach Player
Go to skyline beach and get the clothes and enough rep to get past the bouncer at midnight when darius is there and gives you a power social. Do this a few times. when you think you have enough of the SKYLINE BEACH power socials go again at midnight and make sure your in a good mood then do the social on everyone as best you can before darius leaves the gate of the red room. This will then make you the skyline beach player!
YAY

Dont have to get bullied by a bully
Go into your pad (room with bed and wardrobe) and go in inventory and go on the thing to move objects and move all doors so he/she cant steel 100 simoleons (and spend it wisely) by flame rocker.

Easy rep.
Go to the v.i.p. room during the party and use a power social.

Skip a level
Now I havnt used this coz ive already unlocked every location exept darius's penthouse but this is what I was told:
L1(2) R2 L2 L3 R3(2) and apparently if you entered the cheat correctly you hear the song shut up!