Same Prob, may have found solution on another post
I'm getting the same problem with ssbb on usb loader. On rev14 I get the error message. On rev15 I get the black screen (both after the Kirby fight).. I also installed 222 & 223. Same Problem.
I read on another post:
"I only fixed it yesterday after a tortureful year of freezing
You might not believe but it the problem is your savegame, im guessing its corrupted somewhere and whenever the game tries to save to that part (records, stuff like that) it will freeze the console.
Try backuping your save with Savegame Manager made by Waninkoko and delete the save on your wii.
Then create a new save and try that
It worked for me, so good luck =D "
Haven't tried it yet. Hopefully this will fix our problem