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!

[They disappear]

[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 run]

[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]

Smokescreen: Pinkster?

[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]