Mario Tennis Open (Japanese: マリオテニスオープン) is a tennis sports video game developed by Camelot Software Planning and published by Nintendo for the Nintendo 3DS. It is the fifth installment of the Mario Tennis series and the first one to be released for a handheld console. The game features a variety of modes, including singles, doubles, and tournaments. Players can also customize their characters with a variety of accessories, such as hats, shirts, and shoes. The game also features online play and local wireless play. The game also includes a variety of courts, such as grass, clay, and hard courts. The game also features a variety of mini-games, such as Ring Shot and Skill Zone. Mario Tennis Open is a great game for tennis fans of all ages and is sure to provide hours of fun.