Knockout Kings 2000 is a video game developed by Black Ops Entertainment and published by EA Sports for the Nintendo 64.

Knockout Kings 2000 features 25 fighters, including Muhammad Ali and Sugar Ray Leonard, and includes the ability to create a custom boxer.

A pound for pound boxing arcade style where players can play any of these three modes: Championship, Slugfest, and Training. The "Super Punch" is used where players can instantly knock down his opponent to the floor.