

There are also resources on emulation. Generally speaking, if it’s about console hacking, rom hacking, custom roms, homebrew, and general technical stuff, GBATemp is the place for it.
A lot of people that develop CFWs, emulators, or homebrew hang out on that forum.
However, be advised; the only reason why that forum is even alive after all these decades is because they’re not allowed to directly link to pirated software.
Which is why CFWs and emulators are shared there. Just not the games.