I'm having this problem!
I downloaded
the stuff from there and got Homebrew and everything working fine.
So I go in to Brawl Select my character and press start then if I stay longer then like 2 seconds on SSS without selecting a stage my wii will freeze and make a weird noise.
I got around this problem by setting the random stages to ones I wanted to play and when I get to SSS I immediately hit start.
It is a temporary fix and is really starting to bother me because sometimes I want a certain stage but I can't select it
If anyone out there knows how to fix what I'm going through I would really appreciate it.