Knockout Kings 2002 - Platform: XBox

Easy win:
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After completing the game you will be prompted to select a cheat. Choose 
teleportation. You will have to press your special and R1 to use it. If you are 
playing two player or exhibition mode, set the match to one round. Hit your 
opponent a few times then keep teleporting for the rest of the round and you 
will win. When creating a boxer, give him the Body Blaster as his special move. 
During the match, throw a few jabs and back away. Wait for your opponent to move 
in and hit him with the Body Blaster. It should stun him. Hit him with it again. 
Continue to do this and you will knock him out in no time. This can be done in 
all three weight divisions and works almost all of the time. Also, if you find 
yourself in trouble, try the Backhand (elbow) followed by the Body Blaster. It 
either takes off a good amount of energy or stuns them, leaving them open for 
the Body Blaster.

Better created character:
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When creating a character, set his heart, power, and speed high. It is important 
to have the heart high. If you jab a lot then throw a punch, it will work much 
better than just bashing the buttons.