http://www.pagetable.com/?p=28
Some Gameboy games used uninitialized memory as padding to make the ROM size a multiple of 2mb (or exactly 2mb? Something like that). The uninitialized memory contained development environment, source code, etc. Clever folks can use that to learn a little about the development procedures. Pretty cool! 
			
			
			
				Haha, that's awesome.
			
			
			
				zomg hax