Nemesis

Cheats

Full Power-Up
  Pause and press UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, B, A, START to
  get all weapons. The code can be used once per game.

Destroy all enemies
  Pause and press UP, RIGHT, DOWN, LEFT, UP, RIGHT, DOWN, LEFT, START. It
  doesn't work on bosses. The code can be used once per game.

Power Down
  Pause and press A, LEFT, A, LEFT, A, LEFT, A, LEFT, A, LEFT, START.

Full speed and shield
  Start a game and then pause it and press B, B, B, B, B, A, A, A, A, A. This
  works only once per game.

You can't power up your ship
  Start the game, then pause it by pressing START. Press UP, SELECT, DOWN,
  SELECT, LEFT, SELECT, RIGHT and SELECT, then repeat this sequence two times
  more. Use this code only for added challenge; it prevents you from powering up
  your ship!

Power up Drai
  Pause the game and press A, LEFT, LEFT, LEFT, LEFT, LEFT, START to power up
  Drai.


Cheats by Felipe Gerhard - felipe.gerhard@gmx.net