Godzilla: Save the Earth

Enter 122574 as a code. You will have only one bar of energy that does not regenerate.

Have Space Godzilla make two crystal pillars, then start to attack with crystal beams and mini crystal balls. Also, run around with him. This will save you the trouble of getting hit. Then, just experiment with the attacks until you find a good combo. Note: When your pillars are broken, make new ones quickly.