How to Install RetroArch on your Nintendo 3DS/2DS! - YouTube
Retroarch 1.14.0 Emulator released (Switch/PS Vita/PSP/3DS builds available and more) - Wololo.net
Nintendo - 3DS (Citra) - Libretro Docs
Completed the first themed Retroarch themes, bottom menus and overlays. Links in comments are correct this time, Google was not replacing the files correctly earlier. : r/3DS