subdirectory_arrow_right Super Mario Galaxy (Game), Pikmin (Game), Mario 128 (Game), Mario (Franchise), Nintendo GameCube (Platform)
At Spaceworld 2000, Shigeru Miyamoto showed off a tech demo for a project he had been working on for a number of years known as Mario 128. This project had a tumultuous development cycle with little to no details coming out over the years until finally in 2007 at a GDC Keynote he revealed what came of this laborious project. He explained that some parts of the project were used to make Pikmin and other parts of the project were utilized in Super Mario Galaxy.
person Wolfen50 calendar_month September 6, 2023
DidYouKnowGaming video on Super Mario 128:

Shigeru Miyamoto 2007 GDC Keynote - Part 6

Spaceworld 2000 video footage: