Accessories is the name of a category of items in Nintendogs and Nintendogs + Cats. For both games there are three types of accessories: headgear, eyewear, and collars. In Nintendogs a pet can only wear one accessory at a time while in Nintendogs + Cats a pet can wear three at once, with one accessory from each type.
In Nintendogs accessories can be found on walks, given as a gift from a pet, or occasionally bought from the Discount Store. In Nintendogs + Cats there is a shop that sells only accessories, called Coletta. In addition the player can also buy items from BARC and its accessory-only stores found at the end of walks.
When a dog is being walked, if the dog wasn't wearing a collar before being walked they will have a purple leather collar on. When bathing a pet, any accessory they were wearing will be absent during the wash.