Hello. I just bought Legends Flashback 100. The version I received is Fb8660B, firmware v1.0.2 . Most of the games (82) are recorded on the included SD card as SD.img.
So far, I have tested to run SNES games (.fig) and SEGA (.bin + BIOS_CD) from the SD card - work.
I tried NES - but .nes and...
I was working with a foreign game dev/publisher at PAX East years ago and was so close to being able to dump one of their pre-alphas for their new game from their 3DS dev unit but didn't have an SD card reader with me lmao I was boarding with them and free range of their dev unit to (mostly) do as I please, but just didn't have the hardware I needed for it. sad