Launching Gambatte Gameboy Emulator From Terminal

retroarch -L

// if installed on linux mint using
// sudo apt install libretro-gambatte
// then it will probably be at:
/usr/lib/x86_64-linux-gnu/libretro/gambatte_libretro.so

// full command for me:
retroarch -L /usr/lib/x86_64-linux-gnu/libretro/gambatte_libretro.so /home/bweew/Documents/Syncthing/Lsdj/lsdj.gb

f for full screen f1 for settings like changing the key maps

You can make it a bash script

#!/bin/bash
retroarch -L /usr/lib/x86_64-linux-gnu/libretro/gambatte_libretro.so "$HOME/Documents/Syncthing/Lsdj/lsdj.gb"
chmod +x ~/lsdj.sh

//on raspberry pi 3 64 bit os
#!/bin/bash
retroarch -L /usr/lib/aarch64-linux-gnu/libretro/gambatte_libretro.so lsdj.gb