|Cutie Mark:||A screw and a baseball|
Screwball has violet hair, coat and eyes. Screwball's cutie mark is a screw and baseball. She has a white and purple hairstyle that billows around, and she wears a propellor beanie. Her eyes are swirly. Her other names are a nod to her wacky behaviour including: Topsy Turvy, Merry Melody, Trippy and Screwloose.
Some believe Screwball to be the daughter, or otherwise spawn of, Discord, both because of her odd, chaotic behavior, and the fact that she only appeared during Discord's reign. Many fans support this idea, and there is even a fan-made songdedicated to their relationship.
Screwball has only made one appearance throughout the whole My Little Pony: Friendship is Magic series, meaning her first appearance was her last appearance.
Screwball made her debut appearance in The Return of Harmony, Part 2 .