Some people say formatting your wii gets rid of all the wii shop purchases others say it doesn't
According to nintendo.
http://www.nintendo.com/consumer/systems/w...data.jsp#format
Format (Erase) Wii System Memory
This option is used to delete ALL Channels and ALL save data that have been added to the Wii console and will wipe the system memory clean, as it was when purchased new. Please note that if you also have a Wii Shop Account, that data should be deleted first (click here for instructions).
To delete ALL Channels and save data
1. Access the Wii System Settings screen (how to).
2. Click on the left blue arrow twice to reach the Wii System Settings 3 menu options.
3. Select "Format Wii System Memory."
4. If Parental Controls are set, enter the PIN.
5. If you are sure you want to erase the Wii console's system memory, select "Format."
http://www.nintendo.com/consumer/systems/w...p#deleteAccount
Erasing Wii Shop Account
Note: You should format your Wii Shop Channel and Wii console's system memory prior to selling or otherwise transferring your Wii console to any third party. (For information about privacy and the protection of your personal information, click here.)
To clear information from the Wii Shop Channel, including records of your transactions and rights to download software:
1. Access the Wii Shop Channel.
2. Select "Settings" from the list of options.
3. Select "Remove Wii Shop Channel Account."
Once completed, all information will be erased.