(After defeating Mandark and Deathstroke, Optimus Prime and the Cartoon Network Heroes proceed to the second floor of Aku's palace in order to stop his plans.)

Steven: Who will we be facing next?

Y/N: It depends on how far we're proceeding. We just took two of them.

Robin: Which isn't even the half of Aku's henchmen.

Cyborg: And we still have to deal with Lex Luthor and the Legion of Doom.

Robin: Yeah, Slade surpasses himself as usual.

Y/N: Considering Steven is here, I have a feeling that a certain gem will come to us as well.

(Suddenly a portal opens up, and then Lion Quartz, the Crystal Gems, Ben 10, Gwen Tennyson and Titans West come in)

Cyborg: Hey guys, what's up?

Pearl: Look, blame Ben for bringing us here, Steven.

Amethyst: Yeah, he told us something about "not allowing someone else to defeat Vilgax".

Gwen: Ben always wants the glory of defeating Vilgax.

Y/N: Talking about him... or should I say, them...

(Then Vilgax and Jasper come in.)

Ben 10: Vilgax...

Garnet: And Jasper too...

Y/N: Figured out you would be here, Vilgax. Considering that Ben just came here.

Vilgax: And I will destroy you both.

(Vilgax rushes at Y/N, who blocks his attack.)

Y/N: You are the one who will be destroyed for what you did to countless civilizations. 

(Then Y/N punches Vilgax in the stomach and then rushes at the alien, prompting the others to join the fight.)

Ben 10: Vilgax is mine. Get Jasper.

Steven: Alright.

(Ben 10 tries to become Four Arms, but becomes Heatblast instead.)

Ben 10: (disappointed) Uh, stupid watch...

(Steven jumps and with a glove construct, he punches Jasper so hard that it puts her down.)

Jasper: Damn you...

(Ben and Gwen join Y/N in the fight against Vilgax. Ben tackles him, and starts shooting fireballs at him. Vilgax tries to punch Ben, but gets restrained by Gwen's magic.)

Y/N: Good, Gwen.

(Then both Ben/Heatblast hits Vilgax with a barrage of punches while Y/N shoots him with his blasts.)

(The last blast sends Vilgax flying)

Raven: Azarath Metrion Zynthos.

(Then Raven restrains Vilgax and Starfire brings him down with a powerful blast, causing Vilgax to scream in pain. Meanwhile, Steven and the crystal gems deal with Jasper as they coordinate their attacks in perfect sync.)

Garnet: Now, Finn and Jake.

Finn/Jake: Right.

(Jake stretches his legs, and then Finn jumps off and manage to slash Jasper.)

Jasper: Damn you!

Más: Menos.

Menos: Right. Let's go, Más.

(Más y Menos hit Jasper with a barrage of quick attacks, damaging her considerably.)

Robin: Shall we, Cyborg?

Cyborg: Okay, Speedy. 

Speedy: Let's do it, Robin.

(Then Speedy shoots an arrow at Vilgax, and then Robin kicks it on Vilgax, sticking the arrow deeper into him, and Cyborg shoots him sending him sprawling.)

Y/N: Time for the Big Finish!

(Then Y/N charges up his Ion Blaster and shoots a powerful blast at Vilgax, pulverizing him.)

Y/N: That's just prime.

(Jasper slowly gets up and dashes at Aqualad, and Bumblebee notices it. Then she shoots a barrage of blasts, forcing her to shield herself. But then Beast Boy becomes a Kangaroo and kicks Jasper down.)

Beast Boy: You remind me of Terra. She walked the wrong path too. But she redeemed herself in the end.

(Jasper tries to get up, only for Beast Boy to become a dinosaur and hit her with a tail swag, shoving her off.)

Pearl: Garnet, heads up!

Garnet: Leave her to me!

(Garnet uppercuts Jasper, and then Starfire grabs her leg, and throws her to Raven, who slams her with her magic before sending her to Jake, who punches her back to Beast Boy, who chomps her before spitting her.)

Ben: Dude, I don't wanna be Jasper now.

Gwen: Clever.

(Amethyst and Pearl rush at Vilgax and attack him successfully.)

Vilgax: You pests.

(Vilgax tries to attack both crystal gems, but Ben 10, who just became Four Arms, punches him.)

Ben 10: Finally I became Four Arms. 

(Then Jasper falls down close to Vilgax, completely bruised.)

Vilgax: And they call me ruthless...

Y/N: Blame Aku for this. I can't allow him to turn this world in a dystopia where his evil is law. Now Vilgax, your time is up.

Vilgax: Like hell.

(Vilgax tries to punch Y/N, but the punch doesn't even faze him.)

Vilgax: What?

Y/N: You call this an attack?

(Then Y/N slashes Vilgax in half with his energon axe)

Y/N: Finn, your turn.

(Finn breaks Jasper's gem with his sword.)

Y/N: Now it's time to proceed to the next floor.

Robin: Things are getting harder, huh?

Gwen: Yeah.

Raven: Nothing we can't handle.

Bumblebee: That's right. We will save our world from Aku's evil.

(Then Y/N becomes IDW Optimus Prime)

Y/N: Let's proceed.

(To be continued)