Stage Debut is a cancelled GameCube game that featured characters from the Pikmin, Mario and Animal Crossing series. The game was conceived as a spiritual successor to Mario Artist: Talent Studio, which allowed players to record footage through the Nintendo 64 Capture Cartridge, and import faces from the Game Boy Camera.
In Stage Debut, players could use the e-Reader and a camera to import pictures of their faces onto characters and have them all dance or interact in environments such as a playground or classroom. Captain Olimar was seen dancing in one video with a Red Pikmin and other characters at a game developer's conference. Shigeru Miyamoto has said, as of 2008, that the game is still in development in one form or another. According to Shigeru Miyamoto, a portion of the Stage Debut game "eventually became the Miis and the Mii Channel". It is possible that this game influenced Tomodachi Life.
The Nintendo 3DS’s AR Cards feature provides capabilities similar to those described above; perhaps that is what Stage Debut turned into. AR Cards allows a player with a 3DS and Pikmin card to pose scenes with Pikmin and Miis.