Mario Kart DS is a Nintendo DS game developed and published by Nintendo. It is the fifth installment of the Mario Kart series and the second game for a handheld console. It is the first Mario Kart title to include various features, such as the concept of Retro Cups and online play. It also includes unique modes and features, such as a mission mode and the ability to create custom icons for karts. It also features a map that displays the objects and characters present throughout the courses, making use of the DS's bottom screen.