Why? It didn't exist. Many tools exist for the 16-bit Sonic the Hedgehog, but I belong to the small, quiet group who will always prefer the 8-Bit Sonic 1; for what it lacked in big 16-bit graphics ...

A basic sonic rom base for any hack, featuring knuckles in sonic 1 and 2 combined. To edit the code, I suggest going to http://info.sonicretro.org/Sonic_Hacking_Utilities ...