This happened to me a few years ago? Did you get it at launch? If so, im not sure about the game you imported, but ssbb will most likely not eb able to be read again, unless you spend a half hour trying. its because the original wii games were single layered dsics. brawl, and anotehr game would be Metroid: Other M, are duel layered dsics, so the older wii's have a hard time reading
if you got your wii at launch, or around it, i would suggest getting a usb and start using a usb loader.
I didn't get it at launch I got it Easter of 2007. Would that still be an issue. I was able to et it to play, but I have to eject and put back in the disc everytime it struggles reading it to insure I don't get the error.