KONAMI and Nintendo announced the special collaboration between the Mario series and the upcoming Free to Play Jikkyou Powerful Pro Baseball Heroes Nintendo 3DS game.
The new title release on December 15, 2016 in the Nintendo eShop as a free to play title and if you download it in the first rush you will get a special Mario costume for it.

KONAMI also published a new promotion video about this special collaboration what you can watch above and you can find some pictures in the gallery.