Go to 1p mode, then pick time trials, then pick whoever you want to on any cart. Pick Sherbert Land (Star Cup) then go backward. Turn around. Go to the giant ice things and right when you are about to hit it switch (Z button). When you get unfrozen you should notice that on the map something is not right.(Lets say you were Mario and Luigi. Mario is on the back but on the map it says Luigi is on the back. To get them both on the back press Y or X. DONT SWITCH. You can still drive around but don't get hit by anything. YOU DONT HAVE TO DO TIME TRIALS OR 1P MODE. IT IS JUST THAT THERE IS A LESS LIKELY CHANCE THAT YOU WILL GET HIT
Have fun with this cheat.
Added by: Luigi EX May 23rd 2008, ID#8411