Hmm all standalone Emulators functioned very well with rumble, but the RetroArch builds with mgba core don't functioned, patched and unpatched. Do you have any suggestions?
Sorry no. I have tested your gbg-build and stable retroarch builds. No rumble. Do you know if your Windows-Emu-Build must 100% rumble? Have you tested the gbg-build with rumble?