System name:
gameandwatch

Full system name:
Nintendo Game and Watch

Supported file extensions:
.mgw .MGW .7z .7Z .zip .ZIP

Launch command:
%EMULATOR_RETROARCH% -L %CORE_RETROARCH%\mame_libretro.dll %ROM%

Alternative launch commands:
%HIDEWINDOW% %STARTDIR%=%EMUDIR% %EMULATOR_MAME% -artpath %ROMPATH%\gameandwatch\artwork -rompath %GAMEDIR%\;%ROMPATH%\gameandwatch %BASENAME%
%HIDEWINDOW% %STARTDIR%=%EMUDIR% %EMULATOR_MAME% -rompath %GAMEDIR%\;%ROMPATH%\gameandwatch %BASENAME%
%EMULATOR_RETROARCH% -L %CORE_RETROARCH%\gw_libretro.dll %ROM%

Platform (for scraping):
gameandwatch

Theme folder:
gameandwatch