Where it comes from
Japanese-language document, 2015 The Pokémon Company (Wayback capture of corporate site) · 5 September 2015 Open the original ↗
The line in the source
（2015年3月末現在） ・すべてのポケモン関連ソフトの累計販売数：全世界で約2億7,500万本 [gloss: all Pokémon-related software cumulative SALES count: approx 275 million worldwide] Related figures
The same measure, other periods