This is how Keeping the Overlord from getting the Dark Spark goes in My Little Pony: Fight for the Dark Spark.
[Twilight and the others hurry on]
Twilight Sparkle: Celestia, I really can't talk.
Optimus Prime: Come on! [grabs Twilight]
[They move on, Celestia galloping along side Twilight]
Princess Celestia: Princess Twilight, if you don't tell me what's going on this instant, I'll take away your wings!
Twilight Sparkle: Okay, here's the truth. You know that Dark Spark they're looking for? I accidentally brought it here. We tried to get it back, but Pythor had a secret plot, and now the Overlord's right behind us and he's trying to kill us.
Princess Celestia: Is that true?
[The Dark Spark jumps up and down inside Starlight's saddlebags]
[Celestia skids to a stop]
Twilight Sparkle: Try to think of something to distract him!
[Celestia turns and sees the Overlord]
The Overlord: Hey! Watch it! [growls in frustration] Idiot!
[Celestia grips her teeth and her horn sparks]
[Twilight and the others arrive at the Castle of Friendship]
[Twilight starts casting the transportation spell]
[The Overlord and Pythor arrive]
The Overlord: There they are!
[The ponies and Autobots turn and gasp]
[Celestia's holograph appears in the room]
[The Overlord climbs up another pole with his four arms and grabs another door]
[The ponies and Autobots are carried into a tunnel]
The Overlord: Give me that Dark Spark!
[The door is shut]
[The Overlord crashes into it]
[The ponies and Autobots arrive in a tower]
Optimus Prime: Follow me.
[They follow Optimus through the tower]
[Optimus leads them to another door]
[The Overlord arrives]
Optimus Prime: There he is. Come on.
[They run on]
[Pinkie opens the door and they jump in just as it hits the floor]
[Pinkie skids to a stop]
Pinkie Pie: Whoa.
[The Autobots and Ponies run]
[Smokescreen lands on top of her. Smokescreen looks around]
[Pinkie squirms underneath him]
[Smokescreen looks down and sees her]
Smokescreen: [pulls her free] Oh, sorry.
Pinkie Pie: That's alright.
[They come out of another door]
[The Overlord opens the door and enters]
[He looks around and growls]
[The Overlord prepares to come out when Bumblebee shuts the door on his hand]
Bumblebee: I hope that hurt, dragon boy.
Rarity: Nice move, Darling.
[They join the others on another door]
Optimus Prime: Great job, Bumblebee. We lost him.
Twilight Sparkle: You said it.
[The Dark Spark suddenly slips from her grasp]
Optimus Prime: The Dark Spark!
Twilight Sparkle: Where'd it go?
[The Overlord appears, clutching the Dark Spark]
[He detaches the door, sending them falling]
The Overlord: Nice working with you!
[He flies away]
[Pinkie struggles to get the door open]
Smokescreen: Come on, hurry!
Pinkie Pie: I'm trying!
[She eventually opens it and they climb in]
[The door shatters]
[Twilight uses her magic to open another door]
[They look around]
Optimus Prime: Okay, where could it be?
Twilight Sparkle: There!
[Twilight sees the Overlord]
[She flies after him]
[The Overlord opens a door and enters]