(After dealing with the Rowdyruff Boys and Scaramouche, Y/N and his team proceed further to the fifth floor in Aku's palace.)

Starfire: Hey, friend Y/N.

Y/N (BB Optimus): What's up, Starfire?

Starfire: Who do you think we'll be facing next?

Y/N (BB Optimus): Besides Mojo Jojo, Professor Pericles and Ice King, I suppose we must face Shinobi as well.

Ben 10: I heard that he's a robot specialized in ninja techniques, like... an upgraded version of Forever Ninja or something...

Gwen: It looks like that battle against the Forever Knights has made a number on your brain.

Ben 10: Very funny, Gwen.

(Suddenly Y/N detects something)

Y/N (BB Optimus): They're here. They might be a little tougher, but I have faith that we will defeat them together. 

Daphne: Hey, Velma are you ready?

Velma: You bet I am!

(Then Daphne and Velma transform. Velma becomes a samurai while Daphne becomes a kunoichi.)

Y/N (BB Optimus): Wow. I'm impressed. 

Velma: Do you like it, Y/N?

Daphne: We were saving these especially for you. (winks)

Y/N (BB Optimus): (blushes) Perhaps we should work together. 

(Then Mojo Jojo, Professor Pericles, Ice King and Shinobi come in.)

Buttercup: So you've finally decided to face us head-on, didn't you, Mojo Jojo?

Mojo Jojo: Your boyfriend will pay for what he did to my children!

Y/N (BB Optimus): Do you realize that you're being hypocrite? Your rage over the loss of lives? You haven't been known for your mercy, Mojo Jojo. Compared to you, I'm a Saint.

Fred: He stole Frieza's catchphrase. 

Ben 10: Dude, I would say the same.

Supergirl: Alright, guys. (cracks her knuckles) Let's do this. 

Batgirl: Let's go for it, heroes.

Robin/Bumblebee: Titans, attack!

Y/N (BB Optimus): Let's begin this battle.

Velma/Daphne: Right!

(The Powerpuff Girls rush at Mojo Jojo while Daphne and Velma face Shinobi. Y/N shoots Ice King down and the Titans face Professor Pericles. While they fight, a portal opens as the Justice League, the Kanker Sisters, the Eds and Samurai Jack come in.)

Pearl: Jack?

S. Jack: Batman told us that you would be facing Aku, and I couldn't afford to miss such mission. Defeating Aku is my destiny. 

Superman: Jack also said about Aku's most faithful servant Demongo. And I guess he will be with the Legion of Doom.

(Pericles dodges all of the Titans' attacks.)

Pericles: Pathetic! Your attacks are too predictable. 

(Then Pericles charges at the Titans, but Supergirl freezes him with her freeze breath.)

Batgirl: Excellent job, Supergirl. 

Supergirl: Thanks, Batgirl.

(Meanwhile, Daphne and Velma manage to subdue Shinobi with their ninja gadgets, and destroy him.)

Daphne: We did it.

Velma: We eliminated him.

Mojo Jojo: I'll make you pay!

Blossom: Not so fast, Mojo Jojo. 

Bubbles: You still have to deal with us.

(Then the Powerpuff Girls deal a combined attack, and Mojo Jojo tries to shield himself, but Y/N shoots him down, leaving him wide open to their attack, being badly damaged.)

Mojo Jojo: This... can't... be...

Buttercup: Yes, it is.

Y/N (BB Optimus): You know, Mojo Jojo. If you haven't been working for evil, you could be a brilliant scientist. I know that you've just become a villain because Professor Untonium started neglecting you.

Mojo Jojo: You knew?

(Suddenly Buttercup knocks Mojo Jojo out.)

Buttercup: He talks too much. 

(Then Y/N transforms into Animated Optimus Prime)

Y/N (Anim. Optimus): Now we just need to deal with Luthor and his friends before we can face Aku himself. 

Velma: We will succeed in defeating them, love.

Daphne: We will have a bright future ahead.

(Then they proceed to the sixth floor of the palace as the screen fades out.)