Nintendo generally discourages the use of unauthorized files and has, at times, implemented firmware updates to detect and block third-party NFC devices, though these efforts are rarely permanent. Common Use Cases

There are several online tools that allow you to generate and download amiibo files. These tools typically require you to select the amiibo character you want to download and then generate a file that can be used on your device.

The most common method involves writing the .bin files onto re-writable NFC tags.