Mario Tennis Open is a sports game for the
Nintendo 3DS and the fifth direct 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 and the first handheld installment with a Tournament mode. This game is also the first
Super Mario game to use
QR (Quick Response) codes. In this case, it is used to unlock playable characters and the
Yoshi costume. The game required 2019 blocks to download from the
Nintendo eShop until it was removed from the service after its discontinuation on March 27, 2023. The Nintendo Network service was terminated on April 8, 2024, making the game no longer playable online.