Miitomo

Miitomo was a social-networking app, featuring the Miis. It isn't directly in any series, but due to it containing many elements of the Tomodachi series, it's usually considered a part of the series

The application's online functionality ended on May 9, 2018, due to a lack of active users. The game is somewhat kept alive by the "Kaerutomo" fan-revival project.

Social Networking
In Miitomo, you could communicate with friends by answering questions on various topics, such as favourite foods or current interests.

Mii Customization
At the beginning of the game, you can create your own Mii and choose its personality and voice. You can buy clothes such as tops, suits, bottoms, headwear, socks, shoes and other accessories in the Miitomo Shop, or earn them in Miitomo Drop.

Miifoto
Using the user's Mii and their friends' Miis, users can arrange the Miis in various poses using various backgrounds and effects. These can be used in conversations or posted online. Every day the app will create a "Miifoto of the Day" which you can save.