Mario Tennis Open

Mario Tennis Open is a sports game for the Nintendo 3DS. It is the fifth installment of the Mario Tennis series (developed by Camelot Software Planning). 
The game features gyroscope support and online multiplayer (using the Nintendo Network procedures). This is the first handheld installment in the series to not include a Story Mode or RPG elements. It is also the first handheld installment with a Tournament mode. 
This game is also the first Mario game to use QR (Quick Response) codes. In this case, it is used to unlock playable characters and the Yoshi costume. The game requires 2019 blocks to download from the Nintendo eShop.