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Super powered ship[edit]

To enable a super powered version of your ship, enter the following code. It will allow you to switch between the Rapid-Fire ability and the Super Laster ability by pressing Select button

  1. At the title screen, press Select button × 10
  2. On controller I, press and hold Up dpad + Left dpad + A button + B button. On controller II, press and hold Down dpad + Right dpad
  3. Press Start button on controller I. If successful, the title screen will blink back on to the screen.

Press Start button to begin the game, and press Select button to switch back and forth between the two weapons.

Increased Difficulty[edit]

The altered Big Star Brain

To begin the game at a much higher level of difficulty, enter the following code. Because it involves the microphone, it is only possible to enter this code using a Famicom with a mic on the second controller. All of the enemies, as well as many of the tiles, will be altered in appearance, and many enemies will fire heat seeking fireballs.

  1. At the title screen, press Select button × 4
  2. On controller I, press and hold Right dpad + A button + B button + Select button. On controller II, press and hold Left dpad.
  3. As you press Start button on controller I, you must shout into the microphone on controller II. If successful, the title screen will blink back on to the screen.

Press Start button to begin the game.