Mario Tennis Open (マリオテニスオープン) is a tennis game developed by Camelot Software Planning and published by Nintendo for the Nintendo 3DS. The game features a variety of characters from the Mario series, including Mario, Luigi, Peach, Bowser, Wario, Waluigi, Daisy, and more, as well as different courts and game modes. Players can compete against each other in singles or doubles matches, as well as take part in tournaments or special challenges. The game also features a special StreetPass mode, which allows players to exchange game data with others. Mario Tennis Open also includes online play, allowing players to compete against others around the world. The game also features a variety of customization options, allowing players to customize their characters and courts. Mario Tennis Open is a fun and engaging tennis game that is sure to provide hours of entertainment.