Super Smash Bros Brawl (NTSC) apparently includes a required system update before the Wii is able load the game. The update is only available through the game disc itself and not through Wii Online Update. It is most likely just bug fixes for the game and includes the standard warning about the update possibly bricking the wii if you have any "Unauthorized Modifications", but so far this update does not appear to affect the Twilight Hack on unmodified consoles