Mario Kart Challenge is a fantastic online racing game that takes place in the Mario World. You will have to speed down the tracks and be the first one to reach the finish line. Do not miss the chance to collect the useful items and coins that you come across during the race. More and more characters get unlocked as the game progresses and you can buy them using the star coins you collect during the game play. There are 12 coveted cups to play for during the cool racing game play.