Career Mode Development: To make the matches easier max out your speed and then your strength and keep throwing hooks and your opponent will become dazed. When he is dazed throw your Super Punch to knock him out. Using this technique you will be able to defeat your opponents easily.
Easy KnockOut: When your opponent approaches you at the beginning of a fight use the Special Power Punch to stagger him and when he approaches you again hit him with another and attack him with a combination of body punches. If you keep up the attack his strength will drop and eventually knock him out.