Ability Customize System

The Ability Customize System can be accessed from the seventh line of Set-up Screen (where you choose Manual or Auto mode).

Move left and right to select different abilities and use the A and B buttons to increase or decrease that ability.

Offense ?

Special Attack Increases the strength of your special attacks
Offense Increases the strength of your punches, kicks, and throws
Physical Strength Increases your hit points / life force bar
Defense Increases your resistance to attacks
Playfulness Increases your playfulness. To what effect....?
When performing a special attack, this increases the chances that the attack will fizzle out, causing no damage to your opponent and leaving you vulnerable to attack.
? What does this do? You'll have to find out for yourself.
That's what the manual says. What this really does is increase the strength of your Desperation Attack.