All Star Tennis 99 (USA) (Japanese title: オールスターテニス99) is a tennis game developed by Nintendo and released for the Nintendo 64 in 1999. It features a wide variety of characters and courts, as well as a variety of game modes, including singles, doubles, and doubles with four players. The game also features a wide range of customization options, allowing players to customize their characters, courts, and rules. The game also includes a variety of special moves and power shots, as well as a unique 'Power Serve' feature. The game also includes a variety of mini-games, such as a tennis-themed version of Mario Kart. All Star Tennis 99 is a fun and accessible game that is sure to provide hours of entertainment for both casual and hardcore tennis fans.