Dinky Doo is the placeholder name given to a filly unicorn seen in several episodes engaging in activities with her friends. Dinky has a pale purple coat color, a blonde mane, and yellow eyes. Her eyes are of the standard adult mare model, rather than the filly one. She has sported many cutie marks including a pillow, an archer's bow, a horseshoe, a pair of dolphins, and sometimes no cutie mark at all. She shares her design with Berry Pinch and Tootsie Flute. Dinky appears several times in both seasons one and two as a non-voiced background filly.
Dinky is also with Amethyst Star in Sisterhooves Social. The two of them compete in the titular Sisterhooves Social. Together they are given a ribbon in the pie-eating contest and pig contest. In the race, they take the lead at the box vaulting but lose it at the pie-eating to Rarity and Sweetie Belle. They somehow regain the lead in the race and reach the grape-squishing stage first, but end up losing this stage too.
2:46 leaving school, 16:57 walking from right to left in foreground with a pillow cutie mark, 17:04 standing to the left with a bow and arrow cutie mark, 18:13 visible in background, 18:24 stage right, 19:42 on the left side of the crowd with horseshoe mark, 19:52 right side of crowd with dolphin mark, 20:06 dancing in the crowd