Where it comes from
The line in the source
初週販売本数は255万本と、ニンテンドーDSソフト史上最速最多の滑り出し In English
First-week sales 2.55m, fastest and highest ever for DS software; announced by 株式会社ポケモン
Explore / Figure
Record
Shipments BW first week, Black/White, first week from 18 Sep 2010
2,550,000 units Black/White, first week from 18 Sep 2010
ReportedReported by a reliable secondary source, or read carefully from filed documents.