Knockout Kings 2002 - Platform: Playstation 2

Cheat mode
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Use a created character to successfully complete the game to unlock a 
cheat. There are a total of five cheats that can be unlocked by repeatedly 
completing the game.

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 a 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.

Choose Bernard Hopkins and keep pressing R2. He throws a very effective
uppercut and can knock out the opponent in two or three rounds.

When creating a new boxer, select the Cake Mixer as his special hit combo.
When your opponent is about to get knocked down, hit him with the Cake 
Mixer. About 90% of the time, he will do a spin in the air and fall to 
the mat.

When creating a new boxer, select Macho as his special hit combo and set
your speed and power stats up. Throughout the fight, keep using the special. 
The combo is so quick your opponent cannot react to it, giving your an easy 
win.

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 to be high. If you jab a lot then throw a punch, 
it will work much better than just bashing the buttons.

When you get to the screen to set your stats, choose "Heavyweight" then
select a height of 6'0" to 6'3" and weight of 200 to 210 lb. Then work on 
the stats. The most important ones are speed, stamina, heart, and
power. Go as high as you can so you can give some and take some hits.