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Real NTAG 215 chips never reveal the stored password over NFC, so Flipper .nfc dumps always have zeros for pages 133-134 (PWD/PACK). This causes readers to reject the emulated tag when they attempt PWD_AUTH as part of their amiibo validation flow. The --amiibo flag derives the correct PWD from the UID using the well-known XOR algorithm and sets PACK to the standard 0x8080, enabling proper authentication with Nintendo devices. Usage: hf mfu nfcimport -f Kirby.nfc -s 6 --amiibo Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>