This is another spin-off pokemon game for the DS. this game was released in japan on the 2nd of December 2004 but in the USA it was releasedMarch 14th 2005 and in Europe it was released March 11th 2005 and in Australia and Korea it was March 22nd 2007 (korea) and April 7th 2005 (australia). It was rated E (everyone) in the USA and 3+ in Europe. This is kind of related to mario kart considering it is a racing game and it's a spin-off.
Munchlax made an appearance in this game and this is the first Sinnoh region pokemon to be officially announced.