The 3DS was doing well even before Monster Hunter. The last month or so has been especially good for it with KH3D and Kid Icarus Uprising causing increases in 3DS sales and Fire Emblem having its best launch in years without even counting the bundles sold. Unfortunately for Sony the PSP is still huge in Japan to the point where barely anybody seems to care Vita even released.
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http://myanimelist.net/animelist/swordz9