Two riders share one kart in Mario Kart: Double Dash, Nintendo's 2003 GameCube entry that lets the partner throw items. A special item belongs to the pair: a chain chomp for the babies, a shell for the turtles, a bob-omb family for someone else entirely.
Baby Park is a tiny oval that becomes chaos because the laps are short and the items are constant. Waluigi Stadium and Rainbow Road sit at the other end of the cup list, and the back rider is why a banana can fly while the driver steers.
It is a home-console Mario Kart with a passenger. Later karts went back to one hero per vehicle; this cup list is the one that required a friend in the same seat.