If you haven't updated the Wii's Shopping Channel since Nov. 2012 then you'll want to download and install the RVL-Shopping-v21.zip.
In it you should find 2 wads...
- IOS62-64-6430.wad
- RVL-Shopping-v21.wad
You should also make sure you have Priiloader installed and that you block online updates.
Last time I went in there I know I was able to download FREE apps like Netflix and Youtube.. but I'm not sure if you're still able to make Virtual Console purchases. I thought Nintendo shut all that down when they shut down their WFC servers.