Tinkerbell is Paris Hilton's pet Chihuahua. She made only one appearance in the South Park episode "Stupid Spoiled Whore Video Playset". In Hilton's limo, she uses Hilton's cellphone as a distraction to pull out the driver's handgun and shoot herself with it. Afterward, she is "replaced" by Mr. Biggles.
Tinkerbell has dark brown fur with a light blue bow tie, a blue/sea foam green gemstone necklace and dog shoes. Her appearance is a direct reference to how Paris Hilton dresses up her dogs as fashion accessories and never actually treats them like pets.
As with all of Paris' Hilton's other dogs, she committed suicide. This was because she lived miserably being Paris's fashion accessory.