A selection of Mii characters to be downloaded to your 3DS by scanning the QR Code supplied with each image, I'll update this daily and feel free to add any of your own that you have either downloaded or created yourself.
You should be able to just scan the code straight off your PC screen but if your having difficulty with any you may need to print the images off first and scan from the paper.
For those who don't know how:
What to do:
From the Mii Maker Main Menu, tap "QR Code™ Image Options."
Tap "Scan QR Code™."
Align the code so that it lies within the frame on the upper screen.
Once aligned the system will automatically capture the QR Code™.
Tap "Save" and "OK" to return to the Mii Maker main menu.
Saved Mii characters will appear in the system's Mii Parade.