Enable the "Cheat mode" code. Press R, R, R, R, R, R, R, Left at 
the main menu in the NTSC version of the game. A sound will confirm 
correct code entry. The invincibility option may now be enabled on 
the cheat menu. For the PAL version of the game, press R, C-Right, 
R, L, R, R, R, Left.