Chase Mii (lost Wii U tech demo; 2011)
From The Lost Media Wiki
A screenshot of the demo in action.
Status: Lost
Chase Mii was a tech demo for the Nintendo Wii U shown at E3 2011. In the demo, a Mii dressed as Mario runs ahead of up to four players controlling Miis in a maze-like arena. The players must then catch the Mario Mii once the timer goes off, and whichever player accomplishes this first wins.
In the 2012 Wii U launch title Nintendo Land, there is a minigame called "Mario Chase" that is nearly identical to Chase Mii, only more refined. However, the original tech demo has never resurfaced.