What was the first Nintendo DS game?

Electroplankton was the first Nintendo DS game released. It was released in Japan on April 7, 2005, North America on January 9, 2006 and in Europe on July 7, 2006. The second DS game released was Need for Speed: Underground 2. Released in North America on May 10, 2005. And in PAL regions on May 27, 2005. The original DS was released on November 21, 2004, in North America. (NOTE: The DS was released in NA before JP). In simple English Electroplankton was the first Nintendo DS game.Key:JP=JapanNA=North AmericaEU=Europe