It is a fact that there are many web sites that let you download and burn games for Wii. Most of them are free but not all of them offer complete files, so be careful with that issue. Finding the right site is difficult so patience is really needed - Visit http://www.wiihomebrewdownload.com for more detailed information about this.
Once you get the game through download sites or a torrent, you can download and burn games on Wii by compressing it using zip or rar. Then you can now burn it to a DVD-R or CD, whichever you prefer. It might take some time to do it, so you need to be patient again.
After you have burned your games to your DVD-R or CD, you might want to consider another issue. Most Nintendo Wii consoles are region locked. So you need to install a mod chip so that the console may recognize the copied DVD as an original disc. For those people who own a Wii that already has modded consoles, you need not to install a mod chip. It's already region free.
Now mod chips can be found anywhere in your local game stores or you can order it in the internet. You should first try one that is made for your region before trying other mod chip. Most Wii mod chips like WiiKey and D2Ckey can patch other region games, so your Wii can be region free. I'm not too sure if they cover all regions though.
Although web sites that allow you to download and burn Wii games are rampant, be sure you know how to do it properly so you won't end up paying more than what you have downloaded.
Check out the best review site that teaches you all about safely downloading the Wii games, burn them into DVD's and play on your Wii console - http://www.wii-