Ok all you have to do is go to the options screen and goto the moves list and you can switch how you want to fight. have fun
Enter the following code at the Character Selection Menu:
Up + Circle, Down + Triangle, Left + X, Right + Square, Up + Circle.
You can now choose the same character twice for the same team.
Enter the following code during gameplay:
Hold Circle + Square + Triangle + X and Press Start
The game should reset to the Main Menu.