You guys were all drinking milkshakes over at Sugarcube Corner, and after a couple of sips, Rarity broke the silence. 

Rarity: Oh, I do hate that you had to come back in a time of crisis, Darling! We have so much catching up to do!

Twilight: I know. A lot has been happening back home. 

Rarity: Perhaps you could give us just the slightest bit of gossip from your world? 

Spike: Twilight is known as the Princess of Friendship! 

Ruby: Aww! That's a cute title! 

Sunset: Heh, guess you really were Celestia's prized pupil. 

Sunset: And she's got her own castle too. 

Rarity: CASTLE?! YOU HAVE YOUR OWN CASTLE?! 

Yang: Whoa, easy there Rares. 

Rarity: Ahem,. Yes, sorry about that. Thank you, Yang. 

Twilight: And what's going on here? I mean besides your school becoming the target of dangerous magical creatures from Equestria. 

(Y/N): Well, when we got here, we noticed that Rainbow, AJ, Rares, Pinkie, and Flutters all "pony up" whenever they play their music. 

Rainbow: Yeah, pretty sweet huh? 

Twilight: Hmm ... let's see. My crown was returned to Equestria, but some of its magic must have remained at Canterlot High. Now that we're back together, we can use that on the Sirens, just like how we did on Sunset when she turned into that dem- Oh ... no offense Sunset. 

Sunset: None taken. At this point, I'm used to it. 

Ruby: (whispering to Twilight) She's really going through a rough time, that poor thing. 

Applejack: Well, we've got nothing to worry about now that Twilight is here. 

Fluttershy: Well ... I'm sure we could find something to worry about ... but at least it won't be the Dazzlings. 

(Y/N): Yeah, speaking of the Dazzlings, where would they be at this point? 

Pinkie: There is a big party tonight for all the band who signed up to be in the Showcase! That would include the Dazzlings. 

Yang: In that case, it's time to rain on their parade! 

That night... 

All of the bands that signed up for the Showcase were in the gymnasium where everyone was keeping their distance from each other. 

Adagio: (faking dismay) Oh no. No one's mingling! Heh, it's like there's some kind of underlying tension that could buble to the surface at any minute. 

Sonata: It's the fruit punch, isn't it? 

Sonata pulled out a bottle of apple juice. 

Sonata: I knew I used too much grape juice! 

Adagio: (rolling her eyes) It's not the fruit punch, it's us! 

Aria: But the punch is awful too. 

Sonata: What do you know about good fruit punch, Aria? 

Aria: More than you, you turd! 

Sonata: NO YOU'RE THE TURD! 

Aria: NO YOU'RE THE TURD! 

The two started beating each other up as Adagio bonked their heads together. 

Adagio: Knock it off, you idiots! This is just the kickoff party. Imagine what a tizzy they'll be in by the time the Battle of the Bands starts. 

Twilight: There won't be a Battle of the Bands! 

All of Team (Y/N) appeared. 

(Y/N): Twi, after you. 

Twilight: Let's do this girl! 

Twilight, Rainbow, Applejack, Pinkie, Fluttershy, and Rarity all held their hands, and- 

Twilight: FRIENDSHIP IS MAGIC! 

Nothing happened. 

Ruby: Uh ... wasn't something supposed to happen? 

Weiss: Girls, what are you doing?! You're making dolts out of yourselves! 

Twilight: What the? I don't get it! Why isn't it working? 

Spike: Twilight, you really need to go ahead anddo that "magic of friendship" thing now. 

Twilight: I'm trying, Spike! I thought if we all stood together against the Sirens, it would bring out the magic we needed to defeat them! It happened before! 

Adagio: My, talk about throwing down the gauntlet! This group is obsioulsy serious about winning. (out loud) A little cocky, though! Claiming there won't really be a battle! Seems they think they've already got this thing all locked up! 

Trixie: Well not if the Great and Powerful Trixie has anything to do with it! 

Male Student: You keep telling yourself that Trixie! We're the best! 

Apple Bloom: No way! The Crusaders will win! 

All of the students started quarreling again and negative green energy was absorbed by the Dazzlings! 

Adagio: Hmm ... I think we may have found what we're looking for. Or, it found us. 

Aria smirked, getting what Adagio was talking about, but Sonata looked confused. 

Sonata: I don't get it. 

Adagio: Magic! Don't you see? Everyone else has fallen under our spell. But not them. They're special. 

Blake: So, wait, are you sure it worked that way before Twilight? Or are there details missing? 

Twilight: No, I'm serious, that's how it went before! 

Sunset: Actually, when you defeated me, you drew magic from the crown I wore. The Dazzlings draw their magic from their music. 

(Y/N): So, it's a music battle then. I think 

Twilight: Music battle? OH MY GOD! OF COURSE! (Y/N)! YOU'RE A GENIUS! 

(Y/N): I ... am? 

Twilight: Yes! When you girls play your music, you transform right? 

Applejack: Well yeah, the ears, tails, the whole shebang. 

Twilight: Then in order to defeat the Sirens, we need a musical counter-spell! 

Fluttershy: Like a song? 

Twilight: Yes, and in order to free everyone who's been exposed to the Sirens' spell, we'll need them all to hear it! 

(Y/N): Alright, then let's get you girls organized! 

Later... 

Pinkie: So, what do you want to play? Triangle? Sousaphone? Theremin? 

Ruby: Or Twilight can just sing. 

Twilight: Yeah, I was thinking that too. It would take a while to learn how to play another instrument. 

Rainbow: Wait, as in "lead singer?" That's usually my gig, since this is my ba- 

Applejack: Our band. And of course Twilight is the one with the magical know-how to help us pull this thing off. 

Rainbow: Eh, you're right, that's cool. I'll just see this as a chance to hoe my already insanely good lead guitar skills. 

(Y/N): Alright, let's get to practice, and- 

Twilight: Uh ... I know this is a bad time to say this, but ... I don't know any. 

Everyone: WHAT?! 

Twilight: Whoa! Calm down, I can write one! 

Spike: Yeah, Twilight can write a spell like it's nobody's business. That's how she got to become a princess in the first place. 

Twilight: Well, I technically helped finish a spell, and there was a little more to it than that, Spike. 

Spike: Eh Potato PotAto. 

(Y/N): Well, where are you going to sleep then? 

Twilight: Last time we were here, Spike and I spent the night in the library. 

Pinkie: WHAT?! Come on, all of us are besties now! Sleepover at my house! 

(Y/N): Oh boy. 

Ruby: SLEEPOVER?! HECK YEAH, LET'S DO IT!