are you playing a legal copy of the game (not imported from china, or any questionable site) on a legal nintendo ds?
i had no problems.. typed in capitols like it was in the game, not sure if that matters. --- Am i the only one that finds it odd that there were cars over 20 years ago that got more then 50 mpg, and now car companies brag about 30 mpg?
i will confirm that pirating the game lets you use the unlockable codes. --- Cool, Awesome, Wicked, Phat, Fly, Groovy, Hip, Sweet, Radical, Crunk, Ballin', Hot, Neat-O, Badass, Crazy, Great, Tubular, Fresh, Tight, Dope, Sick, Beast!