IRIS was the codename for an 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 the Multi Screen Game & Watch games. While the staff working on the device was initially against the idea, Yamauchi's suggestion would eventually 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; this system, however, has no relation to the IRIS project.
- Satoru Okada talks Game & Watch, Game Boy and Nintendo DS development. Japanese Nintendo (December 29, 2016). Retrieved January 26, 2018.