Actually his fix does work, but you don't have to delete the hacks, just [SD/private/wii/app/rsbe/st and delete the .bin file]. Like he said after you delete that one obscure file from your SD card brawl will no longer freeze from the stage select screen. I'm glad I saw this because I got this problem with my legit disc and the copy i made on USB loader GX. Glad to have found such and easy fix.
I load brawl on USB loader IOS 223, and deleted the bin file and now it works perfectly on every mode, including online.:D