Nintendo has recently updated their Touch DS site with the official Japanese commercial and diaries of two girls and their new puppies.
The commercial shows a woman coming home to a firelit living room and greeting her puppy - on Nintendo DS. A quick burst of gameplay footage and the release date are shown, and the new DS colors are displayed as well.
The diary has videos and journal entries by the girls as they adapt to their new puppies, teach them their names, and show them to friends and relatives. It's rather interesting watching their reactions, so take a look.