The "DSi binaries" in Pokémon Black 2 refer to the specialized code segments that allow the game to function as a "DSi Enhanced" title. When these binaries are present, the game can tap into the advanced hardware of the Nintendo DSi and 3DS systems—such as the camera for the Xtransceiver, improved battery indicators, and WPA/WPA2 wireless security support. ds-homebrew.com
One notable fan project, Pokémon Black 2: DSi Enhanced Edition , rewrites parts of the DSi binary to add a sleep timer, auto-save on low battery, and improved microphone input for the “Join Avenue” feature.
: The internal game code for Pokémon Black 2 is IREO (North America) or IREP (Europe) .
He dug deeper into the memory addresses 0x027FF000 to 0x027FF800 . This was the User Settings area. The ARM9i was supposed to read the user's birthday and name from the console firmware.