From My Little Wiki
My Little Pony pet from G1. Twinkles came with the Pretty Parlour
Greek Twinkles (back)
Mexican Twinkles the Cat, different mold and painted face
Twinkles the cat appeared in the original My Little Pony Special. Twinkles did not play a role in the special's storyline, but was repeatedly shown alongside an unidentified pony who may or may not be First Born.