I've done this myself with RetroArch on the standard slew of NES, SNES, Genesis, GBA, GBC, and Arcade/FBA roms. Works very well on both Mi Box and Shield TV. Have about 1,000 classic games copied to them.
PSP How To Install NoPayStation Browser https://youtu.be/sMpo-awvheE looking PSP roms
https://www.ppsspp.org/
https://play.google.com/store/apps/details?id=org.ppsspp.ppsspp&hl=en_US
I've done this myself with RetroArch on the standard slew of NES, SNES, Genesis, GBA, GBC, and Arcade/FBA roms. Works very well on both Mi Box and Shield TV. Have about 1,000 classic games copied to them.