Coby has white fur, is short-haired, and wears a Flower Collar.
- He is one of the types of dogs that brings back some chew toys or other playable objects. When you play music records, he; like your dogs, reacts to them.
- Another Chihuahua with a similar personality, called Rebel, owned by Jacob, appears, but has a different appearance. However, Rebel only appears in Nintendogs + Cats.