Give your Mii a vacation house... on your SD card? Nah. These are the Mii Extractor and Mii Installer homebrew programs from developer waninkoko.

These programs allow you to transfer all of your Miis back and forth from your Wii and SD card. Just run the respective program to either install or extract your Miis.

The new version of Wii Installer fixes a bug that caused some users to experience an error message each time they try to run the program ("Error! Mii's database is full! (100)"). Here are the instructions for the Mii Installer:

1. Create a directory called "miis" in the root of a SD card.
2. Copy the Mii's you want to install in the directory created in the previous step.
3. Run this application and all your Mii's will be copied from the SD card to your Wii.

Make sure you go through the readme before using the application.

Download: Mii Extractor v1.1
Download: Mii Installer v1.1