Knockout Kings 2000 (USA) (Japanese title: Knockout Kings 2000: K.O. Kingu 2000) is a boxing video game developed by Electronic Arts and released for the Nintendo 64 in 2000. It is the fourth game in the Knockout Kings series, and the first to be released for the Nintendo 64. The game features a variety of boxers from different weight classes, including Mike Tyson, Evander Holyfield, Lennox Lewis, and Roy Jones Jr. Players can choose from a variety of game modes, including exhibition, career, and tournament. Exhibition mode allows players to play a single match against a computer-controlled opponent or a second player. Career mode allows players to create a boxer, customize their attributes, and fight through a series of matches in order to become the champion. Tournament mode allows players to compete against a series of computer-controlled opponents in order to become the tournament champion. The game also features a training mode, which allows players to practice their skills and learn the game's controls. Knockout Kings 2000 features detailed graphics and realistic animations, and is considered one of the best boxing games available for the Nintendo 64.