No official “NES 1000 in 1 ROM 2021” exists as a commercial product. This list is a concept for an ideal modern multicart ROM set. Real multicarts often contain many repeats or bad dumps.
: Devices like the NES EverDrive N8 Clone or the NES Games Cartridge 1000+ in 1 allow you to play the ROM on original NES hardware via an SD card.
: Every major first-party Nintendo title (Mario, Zelda, Metroid). Third-Party Classics : Icons from Capcom, Konami, and Namco. Hidden Gems