An old school glitch

Ok, Mods, I'm not sure were to put this one so, move it if you need to. Theres an awsome glitch in Sonic the Hedgehog 2. First enable the level select on the sound test(19, 65, 9, 17) reset the Game and hold A and press start at the Title screen to enter the level select screen. Once there, enter the debug at the sound test there(1,9,9,2,1,1,2,4)and enter a level holding a and c. If the debug worked, you should see and weird code at the top left of the screen.Get to the final boss room after chasing robotnic there and turn into a box and create one on the screen. Turn back into sonic and break it. Now it will let you leave the room. Go back to where you fight metal sonic and then chase robotnic again. He will jump into his ship again. But now, there are two of them! you can do this about 5 or six times and eventually his ship will come up and only be half there! Its really screwy. You should try it!^^