To do this cheat/glitch: 1) make sure you have kwik e mart along with the scratch-r available as well as having springfield downs. 2) Go to springfield downs and bet on any dog 3) Then go to kwik e mart and do the scratch-r card thing 4) Scratch your card and get the money but make sure you don't go out of it and just wait under 10 seconds. 5) You will then see that it will show that you have -3 donuts on your task bar. 6) You will now have infinite donuts and purchacing more premium items will make the negative amount of donuts go higher. (WARNING: if you close or logout of the game your cheat will be lost but the items you've purchased will still be there and you can do the cheat again. If this doesn't work the try again as it should work for everyone.
At the 'Main' menu of Disc 3 go to 'Extra Features' and click 'More'. Then scroll down to 'Some Enchanted Evening Script' and press the 'Left' arrow key on your remote control and Bart's shirt will change colour. Press 'Enter' to view an ABC news story about Bart Simpson t-shirts.