Mini Mario & Friends: amiibo Challenge is now released in Japan! The game requires amiibo figures from the Mario series to play different characters and their respective stages. The game is available to download from the Wii U eShop and/or the Nintendo 3DS eShop. The game is still planned to be released outside Japan, but there is no information on when it will be released outside of Japan. For a refresher on the first details, images, information, and trailer, check here.
Mario Tennis: Ultra Smash is also released in Japan for those that are interested in playing tennis. This game has been released everywhere else since November 2015.