This is the best GBA emulator there is, and it works 100%.
Download from HERE and drag the .so file into “/home/cpi/apps/emulators” and into “/home/cpi/.config/retroarch/cores”
You will need to google the GBA BIOS file, I can’t link it. Once acquired, make sure it is in your system directory (set the directory in Retroarch)
The emu WILL NOT FUNCTION without the bios in the right folder.
Also, the pcsx core works just as well as the Standalone included with the unit, but the “.so” file blends into the OS smoother, so I recommend using that. It’s much more cohesive.