When the ponies all end up in Luna and Celestia's old castle, they become convinced that it is haunted by the Pony of Shadows.
My Little Pony: Friendship Is Magic - Season 4 Episodes (26)
Curated by Movi47 Editorial Team
When the ponies all end up in Luna and Celestia's old castle, they become convinced that it is haunted by the Pony of Shadows.