IRIS was the codename for the intended fifth model in the Game Boy lineup, which would have followed the Game Boy Advance SP. According to Satoru Okada, the name was chosen based on the month of May (the fifth month in the year), symbolized in hanafuda by the iris flower. While development was progressing smoothly on the project, at the time president Satoru Iwata told Okada that former president Hiroshi Yamauchi suggested that the system have two screens, similar to a Game & Watch. While the staff working on the device was initially against the idea, it was Yamauchi's suggestion that would lead to the development of the Nintendo DS.
In 2005, one year after the Nintendo DS launch, a new model in the Game Boy line, the Game Boy micro, was released.
- Satoru Okada talks Game & Watch, Game Boy and Nintendo DS development. Japanese Nintendo (December 29, 2016). Retrieved January 26, 2018.