This is how Starscream reveals his plan goes in My Little Pony: Endgame.
[Starscream leads Tirek to a hidden control room]
Tirek: What are these?
Starscream: These are robots I created.
[He projects a hologram]
Starscream: And here's the best part. I got an army of them.
[Starscream shows Tirek the army of robo-equines]