It's common knowledge all the best Go Kart racers cut down to 155 and rehydrate a solid 10-15 pounds before race day. Mario cuts the weight, Luigi does too, but Donkey Kong and King Koopa would have to lose a leg (or a massive spiked shell) to make 155, that's why they have to turn to banana peels and lightning strikes to help them win the race. It's all or nothing for them since they have to give up a percentage of their purse for coming in overweight.
LayzieTheSavage and Gilbert Melendez decided to wrap their legs around a 50 horsepower engine to decide once and for all who was the better go kart driver, and Gilbert wouldn't let Layzie get away with the 'green shell incident of 2009' this time. Watch the Strikeforce lightweight champion dominate the competition as usual.
After this, the crew went to the Rainbow Road track for more fun times.