This copy of Alter Ego was never an official release in the U.S. It is an aftermarket cartridge made by Off the Charts. It will work on any official NES system but may not work on the Retron 5.
AV to HDMI Converter for Retro Game Systems by Old Skool
Playstation 2 Memory Card
Nintendo NES Controller by Old Skool
Super Nintendo Controller by TTX Tech
GameCube/N64/SNES AV Cable