ROCKMAN X2.sfc is the ROM with the original internal header, as dumped. It will run fine on an original cartridge using original hardware, but will not
function correctly in emulators.

Rockman X2 (Prototype)(Hacked)(Fixed).sfc is an altered ROM. Header data has been modified to allow the game to run properly in certain emulators.
The internal title has also been changed to HACKEDRMX2 in order to reflect that this is a hacked version of the ROM.