Sorry for the delay on this video (scroll down for the youtube video). I had difficulties getting this special Mii. I finally figured it out today. I turned off Spotpass in the settings for the Mii Plaza preventing this Mii to arrive. I activated it and received the Mii immediately.
Anyways! To celebrate 3DS's first anniversary, Nintendo of America President, Reggie Fils-Aime, has been sent to 3DS owners.By connecting online with your 3DS, gamers will gain Reggie's Mii in their "Mii Plaza", where he will provide a puzzle piece and a new level 5 warrior in "Find Mii."
As for other 3DS users in other countries they were greeted by none other than the man himself Nintendo's president Satoru Iwata's Mii character.