MiiWiki is a dedicated online resource focusing on Miis, the iconic avatars developed by Nintendo. Launched in early 2021, MiiWiki covers various games that feature Miis, such as the popular Tomodachi and Wii series, as well as other titles where Miis appear as playable characters, even outside Mii-centric franchises. This platform aims to be the most comprehensive resource on Miis, offering information on their history, appearance, and significance in gaming culture.

MiiWiki operates on an open-source model, encouraging community participation to improve and expand the content available, though this may sometimes lead to inaccuracies. Users can create accounts to contribute and help maintain the integrity of the information presented. The wiki has evolved significantly since its inception, transitioning between different hosting platforms to enhance user experience.

MiiWiki not only serves as a repository of knowledge but also fosters a community of Mii enthusiasts who actively engage in its growth and development