In a post on the Miitomo website, Nintendo announced they are shutting down service related to the mobile app.
The service will officially end on May 9, 2018. Nintendo has already ceased selling Miitomo coins and will be offering daily login bonuses of Miitomo coins and game tickets so users can explore the app’s full features during its final days (which is a somewhat sad thought).
Nintendo has stated that trying to launch the Miitomo app after 5/9 will result in a message that informs the user that service has ended. That means you’ll no longer be able to see Miitomo messages, will no longer be able to use items related to the Miitomo app, and your sidekick Mii character will be deleted (again, that’s oddly depressing).
There is some good news, though. You’ll be able to transfer your Mii character to your Nintendo account by ensuring that your account is linked to Miitomo. However, it will not retain its “personality and other information.” You can also save your Sidekick Mii characters by converting them into QR Codes. That code can then be transferred to 3DS or the Wii U. If you want to save any Miifotos, though, you’ll need to transfer them to a mobile device before the shutdown date. Otherwise, they will not be accessible via social media.
Finally, just in case you haven’t got the message, any Miitomo-themed icons and clothing items you may be using in Super Mario Run will no longer be available after the end of service.
News of this shutdown really isn’t that surprising. Miitomo got off to a hot start as people eagerly jumped at the chance to use Nintendo’s first mobile app, but the app never felt like more than a way for Nintendo to dip a toe in mobile waters. They’ve since released a few “real” gaming apps that feel much more true to the Nintendo style.
Besides, it’s pretty clear that Nintendo is trying to move away from the whole Mii universe concept. Any hopes that Miitomo would carry on that concept when the Switch failed to do so seem to be officially crushed.