Capcom has announced huge sales for Monster Hunter 4:

San Mateo, Calif. — April 14, 2015 — Capcom, a leading worldwide developer and publisher of video games, is pleased to confirm that Monster Hunter™ 4 Ultimate for Nintendo 3DS™ has shipped one million units in combined retail and digital units since its release across North America and Europe on February 13, 2015. The game has now become the fastest selling and has the highest Metascore of any Monster Hunter™ title in the west. In celebration of the milestone, a special free Nintendo 3DS theme will be available for download in May as a token of appreciation for all the fan support.