If one code doesn't work, try the other code.

GXUAOKVK Don't lose a life on Ground Pursuit, Boat and Hang Glider stages
AAOTOIZA / AENVNGZA Start with 1 life (first credit only)
IAOTOIZA / IENVNGZA Start with 6 lives (first credit only)
AAOTOIZE / AENVNGZE Start with 9 lives (first credit only)
SZEIPUVK / SXNSYXVK Infinite time
SXXSVUVK / SXXSNUVK Infinite 'Crez' weapon until end of stage
PEXXOAIE / PEXXSATE 9 seconds on clock pick-up
AEEZSPZA / AEOZXPZA Full energy on pick-up
NYXXXVAN / NYXXVVAN Shield lasts longer on Human Fly stages
AGXXXVAY / AGXXVVAY Shield lasts a shorter time on Human Fly stages
SZOUZXVK / SXNXKNVK Don't lose a life against end-of-stage bosses and on
Street Combat stages
SXXLVSVK / SXXUXSVK Don't lose a life on Human Fly stages
OVXZNPSV + PEXXEONY / OVUZKPSV + PEUZSONY Minimum damage taken