Hey mate. I have the exact same problem, and I asked about it in the official sticky thread a while back. Only one person replied, and unfortunately it didn't work. The conversation:

[QUOTE="trugs26"]

[QUOTE="themagicbum9720"][QUOTE="trugs26"]

[QUOTE="Nintendo_Ownes7"]

[QUOTE="trugs26"]

Hey guys. How do you add extra Mii's into NintendoLand? I swear there was a prompt for me to do it when I first played, but I didn't have any Mii's add at that time.

Now I've got a few friends who I want to add in, but I don't see where you can select from your system's Miis. The only Mii available is my one. But I have actually transferred a bunch form my 3DS

Thanks in advance. I'm probably missing something really obvious.

[/QUOTE]

The Mii's are from random people in Miiverse. All the prompt is that when you play it would ask you if you want to connect to Miiverse then the new Mii's from Miiverse will show up.

[/QUOTE]

I mean during mini games. My friends want to play as their Mii's in the games like Chase Mii for example. But they only have default "Guest A", "Guest B" etc. Mii's as well as my own Mii.

[/QUOTE] i think you have to set their mii as a favorite in mii maker, once i did that to my brothers mii, he was able to play as it. [/QUOTE]

No luck. We're both set as favorites in Mii Maker

[/QUOTE]


So yeah, this didn't work for me.

If anyone can enlighten us, it'd be much appreciated!