Hate to say it, but NMH2 is not showing to have legs. The original eased from 36k to 26k in NA from wk 1 to wk2 and slowly dropped from there. NMH2 dropped from 41k to 14k.
Not sure if that suggests the M market is dead on Wii, if NMH2 just can't hold up against the stiffer competition this time, or if it's another case of Wii owners just being content with the original and not feeling any need to buy a sequel. Or perhaps a combination. Not optimistic about NHM2 being a profitable series.