The Sims 2 Cheats

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.

Getting things finished quicker :
To get things done quicker, change the internal clock on your DS system. This trick works well if you want to get rooms built faster. Instead of waiting the normal eight hours, just set your clock ahead eight hours. If you need money get guests to stay, set clock forward the desired number of hours or days.

Refill sanity meter quicker :
In the basement of the hotel, turn to your right. Go down the hall and enter the door at the end of the hall and you will be in a freezer. A piece of meat will be hanging from the ceiling. Go up to it and punch it. Your sanity meter will refill faster than normal.

Free milkshake :
Go to the part of town where all the cows are found. Go up to the cows, not the bull, and tip it over. After tipping it over and it is lying down, select "Milk" to get a milkshake. If you just milk the cow without tipping it, you will get plain milk. You can sell it for 2 Simoleons at the store, drink it, or give it away as a gift.
User Cheat by tristan

Additional aliens :
To get more aliens on your save, set the system clock forward by one minute. Load your saved game and walk around for a minute. Save the game, then set system clock back to real time. The bellhop should say that you are a time traveler and that the aliens have launched a full scale attack. When you see the clock, touch it or you will lose all your sanity.

SSX 3 reference :
Go to the shop in Strangetown. When you enter the shop, go to the left side where you see boxes on a shelf. Look closely to see the box art from SSX 3.

Stop wires from getting chewed:
In order to have the mole or worm stop chewing on the wires, spray it with water several times.

Walk slowly:
Set the Nintendo DS system time ten minutes behind. Then, go back into the game. Somebody will call and say that you are an alien. You will now be able to walk very slowly. Take a shower to make the effects wear off.

Scammers:
There are people who will scam who orders the penthouse. Every time you beat a scammer there will be another one. All they do is take your money away from you.

Rat Cave:
When you go in the City Hall, do not bother building the "Rat Cave". Tristan Legend will build it at no charge when progress in the game, whereas if you do build it, it will cost 3,000 Simoleons.

Free milkshake:
Go to the area of the town where all the cows are found. Go up to the cows, not the bull, and tip it over. After you tip it over and it is laying down, select "Milk" to get a milkshake. If you just milk the cow without tipping it, you will get plain milk. You can sell it for 2 Simoleons at the store, drink it, or give it away as a gift.

Quickly refill your sanity:
In the basement of the hotel, turn to your right. Go down the hall. Enter the door at the end of the hall and you will be in a freezer. A piece of meat will be hanging from the ceiling. Go up to it and punch it. Your sanity meter will refill faster than usual.

Alien revenge:
You can dissect an alien by getting an Alien Mummy and buying the Government Lab for 2,000 Simoleons. Get near the table and select "Alien Autopsy". You must be very still when doing this, you will damage the organs.

Mummified Alien:
Go into the Desert with your Metal Detector. Find the crashed space ship and use your Metal Detector in that area. You should get a Mummified Alien, worth 375 Simoleons.