FF - nothing (whiteness)
Oh and by the way... thank you so much for the tutorial, I'm sure this will help me with my hacks... if I ever make a ROM Hack of Pokémon Emerald. :)
Because I will be creating a hack a pretty soon... once I get my new laptop back next week. It will be called "Pokémon: Dimentions of Time", which will indeed be a hack of Pokémon Emerald. I hope to learn more about hex editing... and of course... ASM editing sooner or later.
Lu-ho made a simple mistake. R/S have free space from 0x6B0000 (or rather 00s. At least I think so) he just guessed Emerald was the same without actully checking it. Causing overwriting of the instruments. I'm not saying that 00 is free space, but i'm saying i think from my offset its like filler data. I did relevant tests to check if the game actully uses it (filled the whole lot with random data) and it had no effect on gameplay or music.