Screwy

Screwy is a female background Earth pony with a light blue coat, bluish gray mane and tail, cerise eyes, and a cutie mark usually of a screw and once of three baby bottles. She is unnamed in the show, but she is named in merchandise. Her dialogue consists entirely of dog noises.

Design
Screwy shares her design, eye color, and sometimes cutie mark with S04E20 Unnamed Earth Mare #4, and she shares her color scheme with Shoeshine and "Bloo".

Depiction in the series
Screwy first appears in the season two episode Read It and Weep. She chases after Rainbow Dash from Ponyville Hospital alongside Doctor Horse, "Nurse Tenderheart", and Night Watch, barking and growling like a dog throughout the scene.

In the season three episode Just for Sidekicks, she is briefly seen interacting with Nurse Snowheart. She also appears on the Friendship Express train to the Crystal Empire in Games Ponies Play.

In season four, Screwy appears in Leap of Faith in line to buy Flim and Flam's miracle curative tonic. During the scene in which Applejack reveals the tonic to be a fake, Screwy's cutie mark is different. She is also seen in a flashback to this scene in Twilight's Kingdom - Part 1.

Merchandise
Screwy appears on the Season 2 character poster, as well as the T-shirt front and iPhone case by WeLoveFine and DVD set packaging that depict the same. She is named on her Enterplay collectible card game card α #202 UR, which lists the quote "Woof! Bow wow! ARF!" She is also shown on the WeLoveFine T-shirt "On a Roll".

Quotes
"[barking]"

- Read It and Weep

"Woof! Bow wow! ARF!"

- Enterplay collectible card game card α #202 UR of Screwy