Check Mii Out Channel

Check Mii Out Channel (also known as the Mii Contest Channel in Japan, Europe, and Oceania) was a channel on the Wii. It let users share Miis with the world, and held contests for users.

Use in Wii Sports Resort
Wii Sports Resort came with the option to import Miis from the Check Mii Out Channel. Once enabled, Miis from the Check Mii Out Channel would appear as spectators, or opponents in Speed Slice, Basketball, Table Tennis and Cycling.

Demise
It was discontinued on June 28, 2013, However, the unofficial RiiConnect24 Homebrew Hack brought it back.