There are many blogs and forums on the internet that offered free downloads of Wii Games online. The Wii Games are all hosted online at File servers such as MegaUpLoad, Rapidshare, HotFile and many others. You may need to purchase a File Server Account if the bandwidth has exceeded for your country. Alternative you may also choose to use Bit Torrent but may take longer time to download the game.
Use the Internet Download Manager to speed up the downloads.