Gb Rom Hacking Program For Mac What Can I Use To Hack A Pokemon Red/Blue Rom?

What can I use to hack a Pokemon Red/Blue rom? - gb rom hacking program for mac

I do my own thing for Pokemon red or blue, but I can not find a good program for hacking it. I met AdvanceMap but I have a. GBA Pokémon Red and seems to come only those files. GB. Who knows which program to use?