Soundwave on 14 February 2014
Second January NPD comparision (per Aquamarine at NeoGaf):
Wii (January 2008): 274K
PSP (Janaury 2007): 211K
N64 (January 1998): 162K
Dreamcast (January 2001): 100K
GameCube (January 2003): 81K
Wii U (January 2014): 49K
Sega Saturn (January 1997): 26K
Vita (January 2014): <17K
You can see what a disaster the Wii U and Vita are.
