Okay, so, I was on my 3DS last night, I checked Mii Plaza and... BAM! About two dozen Miis are there! It may be possible that because I posted my Friend Code on my page, lots of people I have no idea about who they are just randomly appeared.
So, if you are one of those people, write in the comments which one you are, and also add your Friend Code, as it would be a shame if I couldn't contact you.
Until then... HORROR OUT!