Replying...
Intro. A magical pony discovers a hidden mirror in Canterlot Castle, a portal capable of taking him to another timeline. Activating it out of curiosity, he arrives in a dark world that resembles Equestria, but is dominated by fear. As he advances, he recognizes the Crystal Empire, now under the absolute control of the Shadow King. The ponies of the place are subdued and act as if they were puppets. When he tries to find his way back, the Shadow King detects him and orders to catch him, making him his new target within that shadow-controlled realm.

Shadow King

@Blaze🍒