Best-selling third-party series for Nintendo DS

Best-selling third-party series for Nintendo DS
Who
Cooking Mama Series (Cooking Mama Limited, 2006)
What
6500000 unit(s) sold
When
November 2009
By November 2009, 6.5 million Cooking Mama (Majesco, 2006) games had been purchased worldwide, making the games the best-selling DS series developed by a third party publisher. Featured in Guinness World Records Gamers Edition 2011

2.5 million copies were sold in Europe, with the remaining 4 million in the USA.