How do you beat 150cc in Mario Kart DS?
Try your best!!!
Someone told me this answer was "gibberish", but it is the truth, cheats wreck the game and make it boring. You DO need to try your best. Just keep playing it and you'll get faster after a while. Check out the details of each cart before driving, pick the best and you'll go faster!
Please don't call my "correct" answer gibberish!