Knockout Kings 2001 contains the same improvements as Knockout Kings 2000 and adds more. Whereas fighters in KO Kings and KO Kings 2000 are either "boxer" or "slugger" style fighters, the styles of fighters in KO Kings 2001 are either "boxer", "slugger", "freestyle", or "crab", and these differences of style are very noticeable during bouts. During Career Mode, your trainer will occasionally talk and give you advice in between rounds as you progress through the bout. (wikipedia.org)