Unlock Turbo Mode: In 1-Player and 2-Player mode select a fighter and then hold Right on joystick one and two and press Quick Punch + Middle Punch + Fierce Punch. Keep the buttons held until the pre-fight match screen is displayed then release the buttons after the second 'swoosh' sound. The faster speed is only effective for one match.
Fight as Eyedol: Select Riptor as a character and then hold Left and press Quick Punch + Quick Kick. When the Versus screen appears, quickly hold Right and press Medium Punch + Fierce Punch + Fierce Kick. If you have entered the code correctly you will hear the name 'Eyedol' spoken.