Press START on the level select screen to randomly pick a level.

Finish one player mode with any character then in the Character Select press start on that character to get the hidden character.

Charge two or three levels then cancel with a dash. These dashes can deflect lower level attacks. For example, Dash level 3 deflects level 2 attacks.

If you have entered into a fighting, press the following to return back to the main screen: X, CIRCLE, TRIANGLE, SQUARE, START and SELECT at the same time should bring you back to the main screen.