The way Constance arrives and defeating Rothbart, Sa'luk and Queen Chrysalis goes in Revenge of the Ghost Train.
Nightmare Moon: Now, We can rule Equestria!
Dusty Crophopper: Halt!
Rheneas: Hold it right there!
Tirek: It's those fools agian!
Nightmare Trix: You don't know when to quit, Do you!?
Guido: Noi Busters Ghost Train Mai smettere! (Meaning, We Ghost Train Busters Never Quit)
Skarloey: We won't let you take over Equestria!
Nightmare Hiro: All right, you ask for it!
With Yuna and her friends.
Princess Yuna: Come on, Nyx, Let's show Tirek and the Nightmare Family what not to mess with!
Nyx: Go for it!
(Yuna and Nyx opened the portal to Tartarus)
With the Ghost Train Busters.
Nightmare Moon: What is this!?
Sarge: It off to Tartarus for you all!
Nightmare Moon: NOOOOOO!!!! NOOOOOOOOOOOO!!!!!
Tirek: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHH!!!!!!!!! (shrinks back to his weakest form and was send back to Tartarus along with Nightmare Hiro, King Sombra and his family)
Sheriff: That's takes care of them!
Chug: You said it, Sheriff!
Nightmare Moon's voice: Not quite!
Mater: Wait a minute! Oh, wait a minute!
King Sombra's voice: The choice is made!
Lightning McQueen: What choice?
Nightmare Trix's voice: The Evil Prophecy!
Sparky: Evil Prophecy?
Thomas: Destruction of Equestria!
Lightning McQueen: Not the Destruction
Thomas: We didn't made a choice.
Luigi: We'll be too late!
Guido: Dobbiamo fare qualcosa! (Meaning: "We have to do something!")
With Yuna and her friends.
Princess Yuna: Something's wrong.
The others: (looked sternly at Nyx)
Nyx: I couldn't help it. It just popped in there.
Princess Yuna: What?
Princess Skyla: What just popped in there?
Nyx: I... I... I don't understand what you saying is...
Nyx: No! It can't be!
Princess Twila: What is it?!
Nyx: It can't be!
Princess Lilly Sparkle Rose: What are you talking about?!
Nyx: The evil Prophecy!
Balk: Oh no!
Just then, Constance arrives.
Cheerilee: Oh my goodness!
Nyx: It's Constance!
Everyone and Everypony: (screaming and running for their lives)
Princess Yuna: Maybe Nyx would know.
Princess Skyla: How did you know Constance?
Nyx: All I know is that she was suffering herself not having her privacy, Maybe she needs to be at peace.
Krader: Nice thinking, Nyx.
Nyx: I might have that kind of magic to do the trick.
Princess Yuna: Do have the Cubits, Flain?
Flain: Sorry, Yuna. We don't have the Cubits.
Snowdrop: We need to find them soon.
Then, Constance spotted the Ghost Train Busters and the Ghost Train Busters Club.
James: Oh no!
Sunbeam: It's coming this way!
Red Beret: NOBODY STEPS ON A CHURCH IN MY TOWN!!!!!
Gator: 1... 2... 3... Blast her!!!!
Nyx: (use her magic to send Constance's soul in peace)
Princess Yuna: It worked!
Thomas: I have a plan!
Percy: Look, It's Princess Yuna and her friends!
Teslo: Uh-Oh, Guys, We've been spotted.
Dusty Crophopper: Are we glad to see you all.