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Cheats and Hints
Neoseeker: Knockout Kings 2001, nGaming Knockout Kings 2001
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Reviews and Previews
GameCritics.com, GamePro.com - Knockout Kings 2001, GameSpot, GameSpot, Gaming Age - Knockout Kings 2001 (PS2), IGN - Knockout Kings 2001 (PS2), IGN - Knockout Kings 2001 (PSX), PlanetPS2 - Knockout Kings 2001 (PS2)
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GamePro.com - Knockout Kings 2001
http://www.gamepro.com/sony/psx/games/reviews/7537.shtml
Review of PlayStation version with screen shots.