Wii and GC have no difference in this game (aside from the game crashes on a wii if you do the L glitch)
Unless you mean on the wii version of the game
I'm 99% sure ILS works on the PAL version because IS works on the PAL version. the only reason I'm not 100% sure is because I personally have never tested
I own a PAL copy, and can confirm Item Loss Skip works. I see no reason why it wouldn't work in a Wii, since it is the same game.. but that said I can't confirm that.
well I would say "an unexpected error has occurred" (so yeah crashed wasn't really the right word) but this didn't happen to me when I tested it just now on me new Wii, I guess it must have been something wrong with my old Wii or just old Wii's in general, I really don't know (I got my old Wii back in 2007 and my new one was like late 2011)
And to do the glitch you have to be holding L as the game starts or pause and take out the controller and hold L as you put it back in during game play, to fix the glitch take the controller out and put it back in and don't hold L