This is how Rarity finds a Scraplet goes in Scrapheap.
[Ratchet looks at his friends]
Optimus Prime: Arcee, Rainbow Dash, Twilight, and I will search for any clue that will explain the origin of our arctic find.
Ratchet: Only until your sensors go off. Remember, staying in the arctic too long can cause the possibility of being frozen and thus your death.
[Optimus Prime, Twilight, Arcee, and Rainbow Dash go through the Groundbridge]
Ratchet: Transport complete.
[The Groundbridge controls fry]
Ratchet: By the Allspark.
Applejack: So, what do y'all think we should do?
Bumblebee: [beeps] (translation: Uh, video-games?)
Ratchet: Bulkhead, Bumblebee! Here, now!
Bumblebee: [beeps] (translation: Aw, man!)
Bulkhead: You can't boss us around just because the boss is out.
Ratchet: I need some extra servos.
Bumblebee: [beeps] (translation: Oh, brother.)
Ratchet: And I also need some heavy lifting. The Groundbridge is down.
Bumblebee: [beeps] (translation: But can't we just take it apart and rebuild it?)
Ratchet: Optimus, Twilight, Arcee, and Rainbow Dash made it through just fine it's bringing them back that concerns me. Now remove those panels. Chop chop.
[Rarity hears something]
[Rarity falls and sees a Scraplet]
Rarity: Why, hello there, little one. Where did you come from?
[Scraplet just blinks]
[Rarity brings out a screw]
Rarity: Ready? [throws it] Fetch!
[The Scraplet goes after the screw and eats it]
[The Scraplet rubs its head against Rarity's hoof]
Ratchet: We most definitely have a problem. But what could've caused this?
[Lights flicker on and off]
Bulkhead: Or that?
Ratchet: We can't be certain until we find out.
Rarity: Hey, robo-darlings! Look what I found.
Ratchet: We're busy! [screams]
[Bulkhead, Bumblebee, and Smokescreen aim at the Scraplet]
Applejack: What's with you guys?
Bulkhead: Scraplet. Scraplet!
Rarity: What's a Scraplet?
Ratchet: The most dangerous vermin ever to crawl upon the face of Cybertron.
Applejack: This? [laughs] Are you kidding me?
Pinkie Pie: You're giant robots.
Fluttershy: Scrappy here is teeny.
Smokescreen: You have no idea the damage that thing can do.
Rarity: Like what?
[The Scraplet looks at the Autobots and lunges at Bumblebee, first chewing on his leg, then his arm but Rarity beats it to death with a metal bar held by her magic]
Applejack: Easy there, Rarity.
Pinkie Pie: Whoa. I did not see that coming.
Fluttershy: Me neither.
Rarity: I'm sorry, Bumblebee.
Bumblebee: [beeps] (translation: It's okay, Rarity. You don't need to apologize.)
Rarity: Is he gonna be okay?
Ratchet: Maybe, maybe not.
Smokescreen: Now do you believe me?
Bulkhead: All Scraplets do is dismantle machinery and eat anything metal. Especially living metal.
Applejack: Well, bug squashed. Game over. Right?
Ratchet: No. When it comes to Scraplets, there's never just one. And I fear I know how they got in here.
[They go to the pod]
Ratchet: It's a trap. A Scraplet trap.
Bulkhead: Uh, an empty Scraplet trap.
Ratchet: Most likely it was ejected into space eons ago. Only to wind up in the arctic where the temperature kept them in stasis.
Applejack: Well, how are we going to deal with this?
Ratchet: I don't know.
[Meanwhile, in the arctic, Optimus and Twilight are climbing a cliff]
Optimus Prime: Arcee, Rainbow Dash, what's your status?
Rainbow Dash: Arcee's sensor's going off.
Arcee: Guess we should call for pick up before things get worse.
Optimus Prime: Optimus to base. Core temperature readings have reached the blue zone. Prepare to activate Groundbridge.
[There is nothing but static. Meanwhile]
Ratchet: Ratchet to Optimus, do you read? We have a situation! [static] The Scraplets have gotten into the commlink system! If we don't eradicate these creatures immediately, they will reduce this entire base to a scrapheap!
Bulkhead: Well, I say we bug out of here and let them keep it!
Bumblebee: [beeps] (translation: But what if that's not enough for them to scarve down? What if they start devouring the town?)
Ratchet: Evacuation is not an option. If we don't get the Groundbridge back online stat, Optimus, Twilight, Arcee, and Rainbow Dash will perish.
Pinkie Pie: They will?
Applejack: Bulkhead, you never run.
Bulkhead: Applejack, you haven't seen a swarm of these things devour a bot. I have. They pick you apart from the inside-out, going for the small juicy bits first, fuse by fuse, circuit by circuit till there's nothing left. And I mean NOTHING. Not even your optics.
Pinkie Pie: You have to let us help.
Rarity: We're not made of metal.
Applejack: Yeah. Those Scraplets can't hurt us.
Ratchet: Then we'll just have to split into groups.
Rarity: OK good. So we pair off. One bot, one pony.
Fluttershy: I'll watch your back while you repair the Groundbridge, Ratchet.
Appejack: And we go on a bug hunt.
[In the arctic]
Optimus Prime: Optimus to base, do you read?
[Arcee collapses and Optimus helps her up]
Arcee: Are you sure a nice long drive wouldn't help? I hear that Canterlot's beautiful this time of year.
Optimus Prime: The nearest temperate climate is too distant, Arcee. Attempting to reach it would expand too much energy. Until Ratchet sends for us -- And he will -- Our best option would be to seek shelter and insulate ourselves.
[They hear Shining Armor's voice in the distance]
Shining Armor: [distant] Twilight! Rainbow Dash! Optimus! Arcee!
Twilight Sparkle: Shining Armor?!
[Shining Armor appears wearing a black scarf over his mouth and a mask which he uses his magic to remove]
Twilight Sparkle: [runs to him and hugs him] What are you doing here?
[Shining Armor points at Optimus and Arcee]
Optimus Prime: Shining Armor. I presume you are Twilight's brother, Cadance's husband and Captain of the Canterlot Royal Guard.
Shining Armor: Correct. You're Optimus and Arcee. I can see you are pretty chilled, get it?
Optimus Prime: We seek shelter, Shining Armor. Do you know where we can stay?
Shining Armor: The Crystal Empire's not far. I'll take you there so you can warm up. Come on.
[They follow him]
[They enter the Crystal Empire where Princess Cadance is waiting]
Princess Cadance: I was expecting you, Twilight.
Twilight Sparkle: Why?
[She takes them to the castle]
Optimus Prime: My name is Optimus Prime, you're majesty.
Arcee: And I am Arcee.
Princess Cadance: Yeah. Shining Armor told we had some visitors coming.
Optimus Prime: We came here seeking shelter.
Arcee: From the bad, cold weather out there.
Princess Cadance: Well, you're glad to come in and warm up anytime you like.