This is how rock n roll showdown and Ladyan vs Rockset goes in Guitar Villain (CTaRAoMToLaCN).
Ladyan: Ok, Ladybug. You know the plan?
Emmet: Cody see that Sunset's guitar has the Akuma in it.
Ladybug: I can see that.
Ladyan: And that is some good advice. [to Kitty Noir] Like a cat. [rings Kitty Noir's bell]
Cat Noir: Hey, that's my thing.
Kitty Noir: You two handle Guitar Villain and rescue Mr. XY. Ladyan will handle Sunset McStone.
Sci-Ryan: That made me laugh.
[Up on the tower]
Rockset Shimmer: Hellooooo, Paris! Tell us who you love!
Crowd: Rockset Shimmer! Guitar Villain!
[Rockset's hair flares up in gold and red flames as she grows more powerful]
Ladyan: Here we go.
Matau T. Monkey: Ok. I know how to...
Crash Bandicoot: Thomas?
[The others look at him]
Sci-Ryan: [rolls his eyes sighing] Can you please watch something else besides Twilight?
Thomas: Okay. [holds up a photo of Twilight and sighs]
Matau T. Monkey: Ok, Sci-Ryan. What would Tucker do?
Sci-Ryan: Well, obviously he would use his off-key singing voice to make the crowd stop chanting.
Flutterwing: [gasps in realization] That's it!
[He removes the Dazzlings pendants]
Aria Blaze: Hey!
Sci-Ryan: I think he knows what he plans. [removes the Cyberling's pendants] Sing, guys!
Evil Anna: You want us to sing? You said Tucker stink.
Sci-Ryan: We were just kidding. He rocks. He rocks on. And so do you.
Evil Ryan: Ok. I hope it was worse then Unicron.
[They go onto the stage]
The Dazzlings and the Cyberlings: [off-key] We will be adored~
Tell us that you want us~
We won't be ignored~
It's time for our reward~
Crowd: [only half stop] Rockset Shimmer! Guitar Villain!
Bertram T. Monkey: It's working.
Evil Ryan: I felt a bit more happy then this.
[Ladyan charges and knocks down Rockset like Sunset did in the Rainbow Rocks movie]
Ladyan: Hey, Sun-hit wonder. Mind if I jam with the band?
[A butterfly frame appears round Rockset's eyes]
Ryan Repulsa: Ladyan is here! Fight him and take his Miraculous! The bracelet!
Rockset Shimmer: Look here, Ladyan! I do not do duets!
[She strums the strings and sends an energized fist at Ladyan]
Kitty Noir: [pushes him out of the way] Look out!
[The fist hits the ground]
Kitty Noir: No problem.
[Before Rockset can sing, Ladyan uses his yoyo to knock the microphone off her hand]
Ladyan: Hey, no vocals allowed. Maybe you should let me use mine?
Rockset Shimmer: [growls]
Ladyan: [to Kitty Noir] Do you know your powers? Use them.
Kitty Noir: Okay. [brings out her staff]
Ladyan: I think Ladybug knows this, Rockset. You will be knocked out. Lucky Charm!
[A sword like microphone appears]
Ladyan: A microphone? I can use the thing to sing.
Rockset Shimmer: [laughs] You are a joke.
[Ladyan looks around and spots some things that glow Red with black spots: A speaker, a power cable and Rockset's guitar]
Ladyan: That's it.
Iago: Matau. I got an idea. It's risky but it might work. Remember Sam kissed a guy to break Danny from Ember's spell?
Matau T. Monkey: Yeah?
Iago: Kiss Princess Twilight Sparkle.
Matau T. Monkey: Don't mind if I do.
[Matau grabs Twilight]
Twilight Sparkle: Matau, what are you doing?
Matau T. Monkey: You know, we are in Paris. I could give you a kiss good luck.
Twilight Sparkle: Matau. Not in front of Thomas. It'll break his spark.
Matau T. Monkey: Nah. Let him look. For I got love in my heart. [kisses Twilight]
[Thomas gasps and snaps out of his love trance]
Thomas: Twilight. How could you? I... Get away from her!
Matau T. Monkey: Whoa! Too soon! MEGATRON!!!! [activates his jet pack and flies up to Ladybug and Cat Noir on top of the tower]
Thomas: You and Matau? But we were... But… we weren’t, were we?
Twilight Sparkle: He have to do it to free you. Because that is what friends do when they are under a spell. Rockset did that to you.
[Thomas turns around and sees Rockset sticking her toung out. His eyes blaze sky blue as he frowns]
Thomas: [growling] Rockset…
Twilight Sparkle: Thomas? Are you okay?
[Thomas shuts his eyes and the blue glow fades]
Thomas: [looking at her] No. I feel like my spark’s been ripped out. [close-up on his face] But I know who I can take it out on!
[Thomas transforms to OpThomas Prime]
Sci-Ryan: Matau will handle Guitar Villain, Prime.
Ladyan: I need help over here!
Kitty Noir: I've got it! Cataclysm!
[she summons her Dark OathKeeper Keyblade and her right glove glows black]
Rockset Shimmer: Take that! 
[The blasts collide and disapears. Ladyan and Rockset clash their weapons then Thomas knocks Rockset's guitar off her hands and Sci-Ryan catches it]
Sci-Ryan: Ladyan. Set your microphone up.
Ladyan: Ok, Sci-Ryan.
[Ladyan does by plugging his microphone to the speaker. Sci-Ryan plays on Rockset's guitar]
Sci-Ryan: [off-key] Ember!~
You will remember~
Ember, one thing remains~
Ember, so warm and tender~
You will remember my name!~
[The crowd stops chanting Rockset's name and Rockset's hair stops flaring and her power decreases]
Rockset Shimmer: No! Wait! Tell us who you love! Come on! Say it!
Rockset Shimmer: Say our names! SAY OUR NAMES!!!
Sci-Ryan: The only thing you're saying is "See you never"! [hits Rockset on the head with her guitar and the guitar brakes] Smash!
[The Akuma flies out]
Ladyan: Your evil doing is over, Akuma.
Ladyan: Time to de-evilise!
[He catches the Akuma and Ladyan's yoyo closes]
[Ladyan opens his yo-yo and a butterfly flies away]
Ladyan: Goodbye, butterfly. Miraculous LADYBUG!
[Ladyan tosses the microphone up into the air and disappears as a wave of pink that restores the damage. Rockset turns back to Sunset]
Sunset Shimmer: What... happened? Where am I?
Ladyan, Thomas and Kitty Noir: Pound it.
Sci-Ryan: Sunset? Bertram was worried about you. Sorry I hit you on the head with your guitar.
Sunset Shimmer: It's ok.
Ladyan: I hope Matau did the same for Ladybug, Kitty Noir.
Matau T. Monkey: Ok, Guitar Villain. Let Mr. XY go or SwanSong will sing so loud, you will have a headache for next week.