This is how Thunderwing imprisons the Princesses goes in Ryan's Kingdom.
[Thunderwing arrives at the Canterlot castle to steal the Alicorn magic from Princess Celestia, Princess Luna, Princess Cadance, and Princess Twilight Sparkle. Thunderwing tears the doors off their hinges and tosses them aside and approaches the Princesses]
[Thunderwing smirks as he grabs Celestia and tries to drain her magic but there is no magic to drain]
Thunderwing: What have you done?
[Princess Celestia smiles and says nothing]
[Thunderwing then grabs Princess Luna and tries to drain her of her Alicorn magic, but comes with the same result, then tries Princess Cadance, again same result, and finally Princess Twilight Sparkle, same result]
Thunderwing: WHERE IS YOUR MAGIC?!
Princess Celestia: Gone.
Princess Luna: Thrown away.
Princess Cadance: We lost it.
Twilight Sparkle: We gave it to someone else.
Thunderwing: Getting rid of your magic so that I cannot take it from you? That was your plan? How does it feel, knowing that soon, every Pegasus, Unicorn, and Earth Pony will bow to Unicron's will, and that there is nothing you can do to stop it?
Princess Celestia: You will not prevail, Thunderwing.
Thunderwing: Or will I?
[Thunderwing then creates four cages out of Dark Energon and imprisons the Princesses in them]
Jetson Storm: I think you mean OUR will, didn't you?
Thunderwing: Of course. Here, I want you to have something. This was given to me by someone very close to me. I give it to you as a sign of my gratitude and loyalty.
[Thunderwing gives Jetson his medallion]
Jetson Storm: Ok. I love to decorate. It is what Rarity, Bumblebee, and Garfield like.
[Jetson shows two windows. One with Thunderwing holding a sword and Jetson holding a sandwhich and the other, Matau, and the Skylanders bowing before Aku]
Thunderwing: [laughs] Amusing. Even the one with this Aku fellow. But we have no time for such things. With the princesses as our prisoners, we can now–
[He spots a window of Ryan with a crown on his head and wings on his back]
Thunderwing: Is this meant to be humorous?!
Jetson Storm: Uhh. No. I haven't touched that one yet. Which I don't.
Thunderwing: There's a Prime-Prince here? And you didn't tell me this?! [grabs Jetson by the arm]
Jetson Storm: I could assure you that you can think of it as a "team" effort. And now, I have it. Yeah. That's it.
Thunderwing: And where do we find this "Prime-Prince"? Where is the location of his castle?
Jetson Storm: Castle? [scoffs] What do you think I am? Timon's twin all of a sudden? Prime Ryan Prime lives in a library in Ponyville.
[Thunderwing smirks and drops Jetson]
Thunderwing: Not for much longer.
[He destroys the Ryan window off the frame then flies off for his nemesis]