The author explores hidden features in the original Animal Crossing game involving the NES emulator. By reverse engineering code and memory card data, they discovered a way to load custom NES games on the console item. By manipulating memory card files and ROM loading functions, they were able to play new games on the console. The author explains the process in detail, including checksum values, file formats, and ROM loading procedures. This unconventional method allows players to expand their game library and play unofficial NES games on the console in Animal Crossing, providing a unique and exciting gaming experience.
https://jamchamb.net/2018/07/11/animal-crossing-nes-emulator-hacks.html