The Sims 2 Codes -

Control crystal:
Start the game and make sure you are on the "Interact" slot. You will see a crystal on the touch screen. Slide your finger across the touch screen. The crystal will start spinning.

Completion bonus:
After you have completed everything in the game, check at the store every month or change the month on the DS system date until an object that resembles a tanning bed. Buy it and put it in your room. When you get in there, there will be a place to choose your skin color. The colors are green, yellow, dark gray, light gray, blue, red, pink, and orange. The color will wear off in one or two days.

Mongoo Monkey:
Have the Game Boy Advance game Sims 2 in the cartridge slot to unlock Mongoo Monkey for the casino.

"Combat Mode" song:
Collect 12 license plates.

"Razor Burn" song:
Collect 24 license plates.

"Credits Theme" song:
Successfully complete the game. Note: This song is only available on the stereos.