Mario Kart DS Cheats

To get a turbo boost at the start of a race, do not hold the acceleration button down prior to the race starting. Wait until just after the number 2 in the countdown disappears, then hold A. If done right, you will receive a turbo boost as soon as the race starts.

If you fall off the track or get stuck underwater for more than a couple moments, Lakitu comes to pull you out and place you on the track again. When he picks you up, wait until you're dropped onto the track again, then press the acceleration at that exact moment and you'll get a turbo boost if you timed it correctly.