Enable the Cheat Menu. Now go to the cheat menu and set FIRST BACKGROUND to "The Pit," FLAG 1 to ON, and FLAG 2 to ON. When you start, you're at the pit screen, and the moon shadows will always be there (you'll see Santa Claus, the witch, etc.) To guarantee a fight with Reptile, never block, get a double flawless, and do the fatality. Good luck!