You wont just get duplicate channels but you wont able to acess your wii setting! It will semi brick your wii
but with the dvd9 version you just have to quit by 15% and then reset...and then you shouldnt have an semibrick
yeah i mean if i let the full update of the dvd9 version its supposed to do nothing harmless to my wii, except the duplicate channel, not supposed to semi brick.. thats what i say i dont care about the duplicate channels i'll put them to the end of the last page, but is anybody able to confirm if i update with the ntsc-j version of ssbb dvd9 on my ntsc-u wii 3.1 and 1.9g wiikey firmware, will this affect future releases and future updates? like if i do the japanese update and later i get the north american release, will this have an us update that i wont be able to have thus not be able to play the na version? or if i do the japanese update will i be able to do a later on future english update, like i dont know a game that will be out on september 08 like..?
It shouldn't matter. As long as you don't semi-brick your Wii in any way, you should be fine because you can get rid of the dual channels by formatting your Wii's memory when the NTSC-U Brawl comes out. Just make sure you copy all the save files on to an SD card before you do that. Also, you will have to play Smash Bros. Brawl all over again since Brawl's save file can't be copied, but hey, it's better then getting a semi-bricked/bricked Wii.