Pokemon Brilliant Diamond

This page contains notes about Pokemon Brilliant Diamond / Shining Pearl.

Pia Key

The game key for Pia is derived from a constant cryptoKeyDataSeed and the local communication version.

def derive_game_key(seed: bytes, version: int) -> bytes:
    data = bytearray(seed)
    data[1] = (version >> 8) & 0xFF
    data[3] = (version >> 4) & 0xFF
    data[7] = (version >> 1) & 0xFF
    data[12] = version & 0xFF
    return bytes(data)

The cryptoKeyDataSeed is hardcoded to 9918bd0fdcfa65779918bd0fdcfa6577.

Game version	Local communication version
1.3.0 (v6)	199