To proceed with your project, let me know if you want to explore , the legal history of emulator keys , or how to safely format backup files . Share public link
The legal method to obtain these files is to dump them yourself from your own hardware.
The Digital Skeleton Key: Unlocking the Amiibo Encryption Mystery
Once locked, the tag becomes write-protected and functions identically to an official Amiibo.
Move your key_retail.bin file to your mobile device's storage.