Mario Kart: Double Dash!!

Mario Kart: Double Dash!! is a GameCube video game and the fourth Mario Kart game in the series. It was released world wide during November 2003 and has been considered to some at the time to be the greatest in the series.

Gameplay
While overall the game is conclusively not as original as previous instalments, there is one addition that makes it unique, and that is adding two players to a vehicle, hence the name Double Dash. Characters are separated into three different weight categories- light, medium and heavy. The same goes for the multiple different vehicles that you're allowed to ride. The class of vehicle that one is able to choose depends on the heaviest character selected; while light characters can be paired with medium or heavy characters, they will hence be restricted to medium or heavy vehicles, respectively. Two light characters will only be able to choose a light kart. Each character has a special item shared with only one other character (the one in their conventional pairing), with the exception of two unlockable characters (to be found here and here), who receive any of the special items at random.