Dr.Vita on 01 November 2015
As of the 31st March 2012 Tekken Tag Tournament 2 shipped 1.5M on PS3, Xbox 360 and Wii U.
Three and a half years later the game still hasn't reached 1.5M sold on VGChartz.
Definitely undertracked by a good margin.
Source: https://www.vg247.com/2013/05/09/namco-bandai-posts-fy13-results-posts-unit-sales-for-soul-calibur-5-tekken-tag-tournament-2/
