Like previous Mario Kart games, Mario Kart DS features a number of single-player grand prix competitions that comprise four races each. Mario Kart DS includes a total of eight grand prix competitions for a total of 32 different races, many of which aren't available until you beat those that you can select from the outset. Four of the grand prix (or 16 of the races, in other words) are all-new, while the remaining four are composed entirely of classic circuits taken from the SNES, N64, GameCube, and GBA iterations of Mario Kart. The tracks include everything from simplistic figure-eight circuits and beach courses to street races that task you with avoiding traffic and racing around a giant pinball table. Grand Prix competitions can be contested in 50cc, 100cc, and 150cc classes, and as you progress through them you'll notice an increase not only in speed, but also in the aggression of your opponents.ESRB Rating: EveryoneCategory: Racing