With Smash Bros. Brawl hitting players in the States today, unfortunate gamers have had similar disc reading problems to the Japanese release.
Super Smash Bros. Brawl utilizes a double-layer disc which has a large memory capacity. A very small percentage of Wii consoles may have trouble consistently reading data off this large capacity disc if there is some contamination on the lens of the disc drive. Nintendo has specialized cleaning equipment that can resolve this problem. (Please do NOT attempt to clean the lens yourself, as you may damage the system.)
Those with disc reading errors on their Wii can complete the web-form and send in their console to be cleaned by Nintendo directly.
Have you experienced any issues with your copy of Smash Bros. Brawl? Be sure to comment in our forums below.