Development origins
The development team started thinking about what to do for the next Mario Kart game during the development of Mario Kart 8 Deluxe and began prototyping in March 2017, according to producer Kosuke Yabuki. Work officially started at the end of 2017, for the original Nintendo Switch platform. Development moved to the Nintendo Switch 2 platform in 2020. Programming director Kenta Sato: "Back then, we already had an idea of the next system's expected specs, but it wasn't until a bit later that we actually received working development units. Until then, we just had to proceed with development based on provisional estimates."