Get your character's experience to 99, exactly 99, not one less, not one more(you can achieve it by attacking your opponents barehanded to gain 1 exp). Then by using the control opponent code, use an enemy who has the spell of confuse. Cast it on a character in your party, not the enemies! If he hits and then the character will go a level up and have a life meter of 200 and the other attributes are with. Note: This code is confirmed on the Japanese version of the game as well as the American version.