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.
Nintendo 64 System Bundle - N64 Starter Pak - N64 Starter Pak
Nintendo 64 Controller Official Nintendo Brand Authentic Refurbished
Original Nintendo NES System Bundle - NES Starter Pak - NES Starter Pak
Original Nintendo NES Controller - Refurbished