BoxBoy! is a series of puzzle-platform games developed by HAL Laboratory and published by Nintendo. The series centres around Qbby, a square-shaped character who can produce a string of connected boxes. The boxes are used to overcome obstacles in stages that Qbby must be guided through. The first game, BoxBoy!, released on January 14, 2015, in Japan on the Nintendo 3DS. Its sequel, BoxBoxBoy!, was released for the Nintendo 3DS in 2016, with a third game, Bye-Bye BoxBoy!, in 2017. A fourth installment, BoxBoy! + BoxGirl!, was released for the Nintendo Switch in April 2019.