Much like other Mario Kart games, Double Dash!! features a "boost" in the beginning of the race. It also features drifting.
Unlike other Mario Kart games, however, Mario Kart: Double Dash!! allows you to race with two players on the same kart.
Charles: Nah, I'm gonna stay in and play Mario Kart: Double Dash!! It is the best Mario Kart game, y'know.