Evil monsters start terrorizing the citizens of Equestria under the order of an old familiar evil lurking in the shadows looking to take back what is theirs by force. This calls for Princess Luna to call in the teen mystery-solving agency of Mystery Inc. as they agree to help Equestria fight off the incoming threat by exposing the frauds and stop evil from reigning over the land.
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great story so far looking forward to next episode
Sounds like he's been set up. There might be someone else responsible for this. Someone like Chrysalis or Sombra.
Actually MLP has had a crossover with gen 1 transformers in the comics in it starscream takes over ponyville.