Alternatively, if the app requests a single file, provide key_retail.bin . Incorrect File Sizes
If loaded successfully, the TagMo interface will show text indicating success, such as "Have retail unfixed keys" turning to true .
To understand unfixed-info.bin , you first have to understand how an Amiibo is structured. Every Amiibo contains a small NFC chip (NTAG215) with encrypted data. This data is split into two main conceptual parts:
Together, these files allow software to calculate the correct HMAC (Hash-based Message Authentication Code) signatures. Without both files, software cannot validate the data dumps. How the File is Used in Emulation unfixed-info.bin
Instead, the apps require the user to provide their own copy of unfixed-info.bin . Once you "feed" these files into your chosen software, the app gains the ability to: Read existing Amiibo data. Edit character stats or nicknames. Write Amiibo images to blank NFC stickers or cards. Common Issues and Troubleshooting
: This file contains data patterns used to decode the unique, non-static parts of the Amiibo chip.
The specific code that tells the console you just scanned Link, Mario, or a rare Animal Crossing card. Amiibo Series: Identification of the toy line. Alternatively, if the app requests a single file,
: The most popular Android application used to read and write NTAG215 NFC tags. You must manually import the key files during the first-time setup.
Re-encrypt the data to write it onto a blank NTAG215 tag or an emulation device like a Powersaves or Amiibo Link. Structural Breakdown of Amiibo Data
The unfixed-info.bin file is far from a random binary. It is a critical, specialized security key that enables the decryption of the permanent data stored on an Amiibo. It is an essential component for any third-party tool designed to interact with or emulate these figures. By understanding its purpose—to handle the static, "fixed" portion of an Amiibo's identity—you can better understand the technical complexity behind these small, interactive figures. Every Amiibo contains a small NFC chip (NTAG215)
To read or write this data, software needs two specific files: locked-secret.bin and unfixed-info.bin .
: The user edits data like stats, spirits, or ownership info.
What (e.g., TagMo, AmiiBomb, a hardware flipper) are you trying to set up?
If you have ever looked into backing up your Amiibo collection or duplicating figures using NTAG215 NFC tags, you have likely encountered the term . This tiny but critical file is one half of the proprietary encryption key pair required by software like TagMo to read, decrypt, and write Amiibo data.