Battletoads and Double Dragon

IEEOOALA        Start with full lives
AEEOOALA        Start with 1 life
GXXLAAVI        Infinite lives (except stage 4)
GZSOXPVI        Infinite lives on stage 4
PEVELZZE        Start with 10 continues
IYKNIKGX        Bonus score now gives invincibility (instead of invincibility pod)
YPSYPGIE        Longer invincibility
ILSYPGIA        Even longer invincibility
AOSEVAZA        Double Dragon super punch
AOUEUAGA        Battletoads super punch
AXUIPOYA        Stronger enemies