Put a puppy inside your Nintendo DS. Players care for and train their puppy by petting it, walking it and buying it supplies to play with. As a puppy competes in obedience and agility trials, owners can win money to purchase other puppy breeds. Players socialize their pups by walking them around town, where they'll meet neighborhood dogs, and maybe even find new toys. Trips to the park and gym offer valuable training time to prepare for agility trials and disc competitions.