You use real console-emulator?
Genesis plus gx support the rare save system without needs of patches. The best way its use wii
or pc retroarch with gplus gx core.
Also run the game at 60hz and change VDP to 50hz,
Actually I prefer the slower music from PAL, only in wily wars atleast... I think sounds better, more harmonic, at 60, many missable thing, personally. Its turbo xd