As you know, Joan sells Turnips every Sunday until 12 Noon. Then, you have to wait until Monday to sell. However, the following trick makes things easier. Go to the Animal Crossing web site, scroll to the bottom, then write down the Universal code for 100 turnips. On a Monday through Saturday, check the prices until you see that Tom Nook is buying for at least 700 or more Bells. Use the Universal code and make sure that they actually work in your town (sometimes you will be a 'contest loser' - . When you sell them, you will definitely have a lot of Bells.
Turnips and Memory Cards
Note: This trick requires three memory cards, game A, game B, travel data, and a lot of Turnips. Spend the entire week saving up as much Bell as you can on Game A. On Sunday, find Joan and buy as many turnips as you can afford. Save your travel data on slot 2, then travel to Game B. Find out how much Tom is buying Turnips for. If he is not asking enough, save, then set the clock to the next day and ask again. Wait until a day when Tom is buying for over 1000 Bell, but do not set the clock more than a week ahead or the Turnips will spoil. Sell all your Turnips for the profit. Save and take the money back to Game A. Use the money to buy more turnips. Go back and sell them again. Because you are saving the travel data, it does not matter that the days do not match up. You can make over 30,000,000 Bell doing this.
Wasting Time with Turnips
Note: This trick requires two memory cards. If you have wasted all your days with your Turnips and they are about to become useless, you can switch towns then keep checking how much the price is. Once it is at a good price, return to your first town, take a trip there, and sell all your Turnips.
It's a Date
Try to fish, dig Bells, and work for people until the evening, when you would barely get anything. Go to the Animal Crossing Menu and change the time back to 4:00 when the best fish and bugs appear. It is better if it rains. Then, change to one day ahead to make a lot of money. This is also a good way to pay off the debt to Tom Nook and buy furniture for your house. Make sure that you pull weeds that you see to stop them from growing. Use the shovel to stop weeds from growing from a location permanently. When your ready, put your time and day back. You will always get new mail and offers from Tom Nook. This is another good way to get your home and Tom Nook's shop remodeled. Whatever you did in those days like make the shop larger, and will stay the way it was when you visited the future. You should make about 50,000 Bells in about five hours while in the future.
If you can change the date to a day when its raining, you can catch Coelacanth. Do not waste your time with the little fish such as Red Snappers or Barred Knifejaws. Coelacanth are worth 15,000 Bells each. The times that you can catch Coelacanths are 4 p.m. through 9 a.m. when it is raining in any month. The other big rare fish are too rare and not worth catching to make money. Note: Catching rare fish works better with the Golden Rod.
The Known Fossil Cheat
Use the following trick to get easy money and a lot of fossils. Find three fossils and mail them to the Museum. On the day that they arrive back in the mail, open them and see what you get, as usual. If the Museum needs it, give it to them. If not, sell it to Nook. Then, go back to your personal Gyroid Assistant and save the game. Reset the Gamecube with the cover open so the system menu appears. Set the date back one day, and start the game again. Check your mail, do whatever you want with the fossils, then save and restart the Gamecube again. Set the date back to the current day and restart the game. Do this until the Museum is full, or you no longer want to continue with the trick. Note: If you reset the game date by using the option the game provides (before you start your game - , sometimes your fossils will not be sent to you in the mail and you will not find any for awhile. The game knows when you are cheating this way, and reflects this with less valuable items.
Fruit Trade
Take fruit from one town and sell it to Nook at another town. You will get paid five times as much for it. Note: This only works if each town has different fruits.
Get fruit other than the type that naturally grows in your town. Do this by visiting other towns or getting one from a person in your town when you talk to them. Bury them and they will grow into trees that give off three pieces of that fruit every few days. Each is worth 500 Bells. Do not crowd trees in too close. This usually causes them to not grow. You can set the clock forward to grow trees faster and to make the fruit reappear quicker. Fruit trees successfully grow almost all of the time.

