Advanced users skip the physical tag altogether. Devices like the Flipper Zero, Chameleon Ultra, or N2 Elite store the encrypted data in memory and emulate the NFC signal on‑the‑fly. The keys are still required to create the initial data file, but you never write to a physical tag.
(often referred to as key_retail.bin , key_common.bin , or unfixed-info.bin ) are cryptographic keys used to decrypt, authenticate, or emulate official Nintendo amiibo data.
To read, modify, or simulate an Amiibo, backup software and hardware emulators require the digital "keys" used to unlock this encryption. These keys are typically distributed online as two distinct binary files:
A straightforward personal workflow
Stored inside this chip is data that identifies the specific character (e.g., Mario, Link, or Isabelle) and holds game-specific save data (like your trained fighter stats in Super Smash Bros. Ultimate ).
where to purchase the correct blank NFC Tag 215 chips.
| Aspect | Summary | |--------|---------| | | Cryptographic keys to decrypt/emulate amiibo data | | Required for | Homebrew, backups, tag writing | | Legality | Distribution is prohibited; personal use is contested | | Tools | TagMo, amiitool, emuiibo | | Risk | DMCA notices, account bans (if used with online Switch games improperly) | amiibo key files
It is important to note that while backing up your own figures is considered fair use in many jurisdictions, distributing or acquiring the proprietary locked-secret.bin and unfixed-info.bin keys is a gray area often associated with third-party software, so proceed with caution.
Thenaya works similarly, but it runs directly on a hacked 3DS. It expects the keys to be placed at /amiibo_keys.bin on the SD card root. You can then dump existing amiibos or write new ones using the 3DS’s built‑in NFC reader.
If you’ve been diving into the world of Nintendo Switch or 3DS modding, you’ve likely heard the term or “bin dumps.” These files are the backbone of digital amiibo emulation, allowing you to access in-game rewards without a physical collection of figures. Advanced users skip the physical tag altogether
Downloading them is very likely a violation of Nintendo’s copyright and anti‑circumvention rights. However, extracting them from your own console for personal use is in a legal grey area that has never been tested in court.
Let’s be direct: