Invincibility:
Press Start to pause game play. Then, hold L2 and press Right(2), Left, Right, Left
(2), Right, Left, R2, Up(2), Down(2), Up, Down, Up, Down, R2. A sound will confirm 
correct code entry. You will be invincible until you complete the game. Activate the 
code again to disable its effect.

In the Japanese version, press Start to pause game play. Then, hold L2 and press 
Right(2), Left, Right, Left(2), Right, Left, R2, Up(2), Down(2), Up, Down, Up, Down, 
R2.

99.9% charge dose:
Press Start to pause game play. Then, hold L2 and press R2(2), Left, Right, Up, 
Down, Right, Left, Up, Down, Triangle. A sound will confirm correct code entry. 

Full blue power, missiles, and bits:
Press Start to pause game play. Then, hold L2 and press R2(2), Left, Right, Up, 
Down, Right, Left, Up, Down, Circle. A sound will confirm correct code entry. 

Full red power, missiles, and bits:
Press Start to pause game play. Then, hold L2 and press R2(2), Left, Right, Up, 
Down, Right, Left, Up, Down, Square. A sound will confirm correct code entry. 

Full yellow power, missiles, and bits: 
Press Start to pause game play. Then, hold L2 and press R2(2), Left, Right, Up, 
Down, Right, Left, Up, Down, X. A sound will confirm correct code entry. 

Lady Love ship (#3):
Enter 4170 4170 as a password at R's Museum. 

Strider ship (#24):
Enter 5050 1060 as a password at R's Museum. 

Mr. Heli ship (#59):
Enter 5959 5959 as a password at R's Museum. 

Curtain Call ship (#100):
Enter 9910 0101 as a password at R's Museum.