Music went to the area, Kessler was already there.

Kessler: Here we are, the final battle, the battle that will settle it all.

Music: I'm ready.

Kessler: This will be fun, after I kill you, I'll kill the others, then nopony will stop me or the other Conduits!

Music: Soon, after I defeat you, we're gonna defeat Bertrand, then we'll save Shady!

Kessler started to laugh.

Music: What's so funny?

Kessler: Two things, one I killed Bertrand.

Music: What?

Kessler: Yeah, not too long ago, now two, I killed Shady.

Music: WHAT!?

Kessler: Y'know, it was actually disappointing, he couldn't resist for long.

Music: YOU BUCKER!

Kessler: Well now that that's out of the way, let's do this!

(Fight music)

https://youtu.be/BnhjgV6drvM

Music charged at Kessler, Kessler grabbed Music and threw him into a wall, Music used dubstep waves, it hit Kessler dead on, Kessler hit a generator, he absorbed the electricity from it and smiled as he shot electricity from his hooves at Music hitting him and shocking him, but it was different from normal lightning, it was black lightning, with a red outline.

Kessler: Thinking about it now, Shady was just a weaker version of me, all he could do was shoot electricity from the sky, while I have pure electrokinesis, I control electricity all together, although I will admit.

He struck Music with lightning from the sky.

Kessler: Striking you with lightning from the sky is a different experience than shooting it from my hooves.

Music used his horn to lift Kessler into the air, repetitively slamming him into the ground.

Music: This! Is! For! Shady! And! Trish!

Kessler teleported to Music and used his magic to create a shockwave knocking Music back, Music fell to the ground, he got mad and used a dubstep wave, Kessler teleported behind him and yawned tauntingly. Music tried to attack him again just for Kessler to teleport behind him again and tap his shoulder.

Kessler: Is that all, with all the accomplishments I've seen you do, I expected more. I mean, you helped kill The Beast, this shouldn't be hard.

Music: How do you know about that?

Kessler: Isn't it obvious? I was there.

Music: What?

Kessler: Well, that doesn't matter now, after all, you're about to die.

Kessler grabbed Music's head and shocked it, Music screamed in pain, before he could kill him however, he was hit by a magic blast.

Lucky: Don't worry Music, I'm here to help!

Kessler: Two versus one? Maybe this will be interesting.

Lucky and Music charged at him and started attacking, Kessler dodged their attacks easily and shocked them both. 

Kessler: Maybe not.

Music started attacking with dubstep waves which Kessler just dodged.

Kessler: Stop holding back from me.

Music: Okay then.

Music Hit the BASS DROPPER button. He instantly got healed, but Kessler wasn't slowed down, Music charged at Kessler, he used his dubstep waves to hit Kessler who got hit and launched back. Kessler quickly got up and shot lightning at Music shocking him, Music got up and charged using dubstep wave after dubstep wave, Kessler over time got used to it and started to dodge them he shocked him and launched Music back, Music hit the button again deactivating it.

Music: You're pretty good, you should've slowed down.

Kessler: I countered it.

Music: How?

Kessler: It's easy, especially since.

Kessler took off the hood revealing a familiar red and blue face, his hair still draped over his blue eye, his voice changed to normal he still had no horn however.

Kessler: I know who made it.

Music: Shady?

Kessler: Kessler, like I said, I killed Shady, that laser that hit him, it turned him into me, he tried to resist, he tried to stop me from taking over but he failed.

Music: *Whispering* Lucky, Cole and Zeke, they're pretty smart, you think they could make a machine that could reverse the effects?

Lucky: *Whispering* Turn him good or reverse the effects?

Music: *Still whispering* Reverse the effects, it would be kinda boring otherwise.

Lucky nodded and teleported away.

Kessler smiled.

Kessler: Y'know what makes me and Shady different? He was stupid enough to make friends, all they do is slow you down.

Music: No, what makes you two different is the fact that Shady was smart enough to know one thing, don't buck with my friends!

(Song #2)

https://youtu.be/17467ag0ODM

Music teleported behind Kessler and used a dubstep wave knocking him back into a wall, Music used telekinesis to slam Kessler into the wall repetitively. Kessler got mad.

Kessler: Okay, that's it!

Music: I can tell that hurt.

Kessler smiled.

Kessler: What can I say? You're powerful.

Kessler used lightning to heal himself.

Kessler: I mean, I can just do that, but still, you're pretty powerful.

Music: Oh that's just not fair!

Kessler: I don't care about fairness, I'm evil, and now it's time to get real.

Kessler flipped the hair that covered his eye back revealing that he had four scars on his blue eye and that his blue eye was red. His smile and stare got much more sinister.

Kessler: I hope you're ready to die.

Kessler made a shadow knife and threw it at Music, he dodged, Music went was punched by a clone Kessler made. Kessler then threw a lightning grenade that exploded on impact, Music was sent flying back.

Music: So, what's your plan?

Kessler: To rule the multiverse with the other conduits.

Kessler shot electricity at Music, he dodged and used dubstep waves to attack Kessler. He didn't want to kill him, just hold him off long enough for them to shoot him with the machine when they make it.

Kessler: Just give up, it'll make this easier.

Music teleported behind him only for Kessler to shock him.

Kessler: Not this time!

Music got up and fired three dubstep waves at Kessler but he jumped back to dodge it.

Kessler: You really think you can win?

Music noticed Lucky, Cole, Zeke, and all the others there with a machine.

Music: Of course I can.

Kessler: Good, I love crushing beliefs.

Kessler charged at Music making it hard for the others to aim, Music noticed this and let Kessler hit him, he fell to the ground pretending to be weak. Kessler bought it and walked up to Music.

Kessler: Not gonna lie, it was fun.

(Meanwhile with the others.)

Cole: What's happening?

Zeke: Buck he's losing!

Frankie: No he isn't.

Zeke: Huh?

Lucky: Frankie's right he's doing that to get us a clear shot!

They all helped aim the machine.

(Back to Kessler and Music.)

Kessler raised his hoof and held a lightning bolt.

Kessler: Goodbye Music.

Music: Heh, we win.

Kessler: What?

Music: Behind you.

Kessler saw but it was too late, he was sent flying into the wall. The others came.

Lucky: Did it work?

Music: Let's see, stay on guard.

They all walked up to him, he opened his two eyes, one eye was blue again.

Shady: Ugh, what happened, last thing I remember is resisting a force taking control of me. Why are we back on Equestria, and what happened to my hair?

Shady draped his hair over his blue eye, covering both it and the scars.

Shady: Eh maybe I'll keep it that way, I'll see.

They all sighed.

Music: It worked.

Shady: What worked?

(*In Spongebob narrator voice* One explanation later.)

Shady: Wow, that's a lot to take in.

Frankie: That's why you were acting all weird that one time isn't it?

Shady: Oh yeah, that's why. (In head) Thanks author.

No problem.

Music: What about your horn?

Shady: I'll deal with that tomorrow, for now, let's go home.

They all walked home.

(Meanwhile in Tartarus.)

The Beast: YOU BETRAYED ME!

Dark Lightning: IT'S NOT MY FAULT YOU DIDN'T HAVE THE BRAINS TO SEE THAT RULING EQUESTRIA IS SMARTER THAN DESTROYING IT!

The Beast: ARE YOU CALLING ME STUPID!? WHY YOU LITTLE-

Bertrand: Hey hey hey let's all calm down!

The Beast: Who are you?

Bertrand: I am Bertrand, listen, we all have the same enemies, we should work together and defeat them.

The Beast: The three of us?

Bertrand: Three of us? No, all of us.

All the Conduits that they killed were behind him.

Bertrand: I say we not only kill them, but wreak havoc on their world, by unleashing every single being in here! Every single one! It'll ruin them, so, you in?

They looked at each other and smiled.

The Beast and Dark: Let's have some fun.