Well, in the first attempt to load a ROM, there was a system memory error which scared the fuck out of me. The second attempt successfully loaded a ROM. When I quit retroarch, the system crashed. Very reliable emulator.There you go again. Anyway some cores require a bios file to run so you'll need that, for anymore assistance look at this https://wiki.libretro.com/index.php?title=Main_Page or read the first page of this thread here https://gbatemp.net/threads/retroarch-wiiu-wip.447670/