New Super Mario Bros. Mii (lost Wii U tech demo; 2011)
New Super Mario Bros. Mii is a tech demo for the Nintendo Wii U shown at E3 2011. It was based on the Wii game New Super Mario Bros. Wii, had new levels, and allowed the players to play as Miis. It was meant to demonstrate the Wii U's Off-TV Play mode, which allows the game to be played on the Wii U GamePad without using the television screen. The demo would play for ten minutes and then automatically reset itself. When the Wii U was released the following year, one of its launch titles, New Super Mario Bros. U, was similar to this demo.
The actual demo, however, hasn't been seen since E3 2011 and is currently unavailable.