Appledoom is an evil clone of Applejack, created by King Sombra. Like her otherself she is very strong and can do fancy rope tricks and speaks in a western accent like AJ can, but she is a complete liar and disrespectful. In the film, she completely abuses Apple Bloom and often whipped the filly with her rope. Armed with a sawn-off shotgun, she is ready to put doom where she goes.
- Appledoom appeared in Thomas and Twilight Sparkle meet the Prince of Persia: Sands of Time.
- She guest stars in in Thomas' Adventures in Transformers: Prime.