Nintendogs: Dalmatian & Friends - Nintendo DS

Nintendogs lets you take care of virtual pets (dogs, obviously) on your Nintendo DS. You can train your puppies by speaking commands into the microphone, pat the pooch with the Stylus, play games like "fetch" with a frisbee, buy toys, food, and accessories, and take part in 3 types of competition to win trophies.

If there are other Nintendo DS users with Nintendogs nearby with both of you in "Bark Mode", you can link the games wirelessly and see your and their dog meeting on both screens.