Super Mario 128 was a codename for two different development projects at Nintendo. The name was first used in 1997 for a sequel to Super Mario 64 for the 64DD, which was canceled. The name was reused for a GameCube tech demo at the Nintendo Space World trade show in 2000. Nintendo gradually incorporated the demonstrated graphics and physics concepts into the rapid object generation of Pikmin (2001), the physics of Metroid Prime (2002), and the sphere walking technology of The Legend of Zelda: Twilight Princess (2006) and Super Mario Galaxy (2007). The Super Mario 128 demo intrigued widespread analysis, rumors, and anticipation in the media throughout the 2000s. History Super Mario 64-2 The name Super Mario 128 was first used as early as January 1997 by Shigeru Miyamoto, as a possible name for a Super Mario 64 sequel. The name Super Mario 64-2 was also used interchangeably with Super Mario 128. This rumored expansion and sequel to Super Mario 64 was said to be developed for the 64DD, but was canceled due to the 64DD's commercial failure. Miyamoto mentioned at E3's August 1997 convention that he was "just getting started" on the project. At Nintendo's Space World 1997 trade show in November 1997, Miyamoto added "We haven't decided [whether it's two-player] yet. We are currently working with a system where Mario and Luigi can co-exist, and they are both controllable by the player. But we will decide more game elements when we finish everything about Zelda." In November 1999, Miyamoto said, "Well, for over a year now at my desk, a prototype program of Mario and Luigi has been running on my monitor. We've been thinking about the game, and it may be something that could work on a completely new game system." The game had only a demo of one level made for it. Miyamoto claimed that multiplayer functionality was the first aspect of the game that he wanted to include. Miyamoto had considered the two next frontiers of the Super Mario series to be a gameplay mechanic of walking on a rotating sphere, and coincidentally a setting in spacebut it took a long time to find a way to resonate these ideas with the production team. He loved the novel idea of sphere walking, because it was totally unexplored in the game industry, and because focusing on a full sphere can eliminate camera movements and thus motion