Dinky

Dinky Doo, also sometimes called Dinky Hooves, is the fan name for a filly background character. A portion of the fanbase has adopted her as the daughter of Derpy Hooves due to a somewhat similar color scheme, and despite the fact that Derpy is a Pegasus and Dinky a unicorn; this circumstance was retroactively made more likely by the episode Baby Cakes, in which a passing reference is made to pony genetics. Dinky's most common last name comes from "Ditzy Doo", an alternate name for Derpy that was particularly popular in the early days of the fandom.

The show features no explicit acknowledgment of Dinky's assumed relationship with Derpy, and in fact has paired the filly up with several other background characters. While presumably coincidental from a production standpoint, these new "canon" developments are typically swiftly incorporated into the "fanon" prefered by fans. When Dinky participated in the competition in Sisterhooves Social with a pony named Sparkler and with Derpy Hooves watching the competition from the stands, some fans turned Sparkler into Dinky's sister and hence Derpy's older daughter, while others prefered the idea that Sparkler was participating in a Big Sister program (example). When Dinky was seen with Carrot Top and an unnamed stallion in several scenes of The Last Roundup, some fans suggested that Derpy and Dinky may have moved in with Carrot Top and her boyfriend; a close friendship between Derpy and Carrot Top had already been part of fanon before the episode aired.

Dinky is the protagonist of several short stories, including Today, Tomorrow, and Forever and the Dinky Doo trilogy; the latter also provides an answer to the question of Dinky's parentage.