(The Cartoon Network Heroes get in their fighting stance, and then Ben 10 activates his Omnitrix.)

Ben 10: It's hero time!

(Then Ben 10 becomes Waybig.)

Eternal: Really? We have two giants.

(Steven then shields himself from Kamen Rider Eternal's attack while Ben 10 charges at Alien Baltan, who quickly dodges the attack.)

Baltan: (laughs)

(Then King Joe divides itself, giving trouble for the Teen Titans while Shadow Moon has no trouble dealing with Gumball.)

S. Moon: This blue kitten is weak.

(Blossom tries to use her heat vision on Kamen Rider Eternal, but he deflects the beam.)

Eternal: Who's next?

(Generator Rex transform his arm and charges at Alien Baltan, who dodges the attack and Rex accidentally hits Ben. Samurai Jack has a sword clash with Shadow Moon.)

Eternal: Hahahaha! Isn't this fun?

(Then Sonic tries to hit King Joe, but gets hit by its beam, and Juniper Lee tries to bring Kamen Rider Eternal down, only to be brought down herself.)

Juniper: Okay, you're tough, but I am the Tenshuan Z!

(The Teen Titans try their luck against King Joe, but Alien Baltan joins the fight and brings them down.)

Beast Boy: If I said "the bigger they are, the harder they fall", I would have to take it back.

(Robotboy helps Juniper Lee against Kamen Rider Eternal, but both Alien Baltan and King Joe easily knock them out. Only Supergirl remains.)

Supergirl: Time to show you my power.

Eternal: Bring it on. I'll send you straight to hell.

(Supergirl uses her freeze breath on Kamen Rider Eternal, who breaks free and quickly kicks her away, sending her to crash into a fountain while Shadow Moon kicks and stabs Samurai Jack.)

S. Moon: Your fates are written.

Eternal: Hell awaits you.

????: Don't bet on it!

(Suddenly two boys and two giants are seen in front of them.)

Noah: Now, shall we begin with the experiment?

(Noah shakes two fullbottles and places them on his Build Driver.)

Driver: Rabbit! Tank! Best Match!

(Noah then cranks up the driver's lever.)

Shimizu: Rider...

Driver: Are you ready?

Noah/Shimizu: HENSHIN!

(Then they transform into Kamen Rider Ichigo and Kamen Rider Build.)

Driver: Hagane no Moonsault! RabbitTank! Yeah!

(Supergirl gets shocked by seeing two Kamen Riders and two Ultras while Kamen Rider Eternal glares at them.)

Eternal: You're always getting on my nerves, dude.

Ichigo: You're the ones who will go to hell!

Build: Yeah, let's smash these villains.

(Then the four heroes charge at the four villains. The Cartoon Network Heroes are amazed at them.)

Ben 10: Who does he remind me of?

Steven: These four have nice armors.

Beast Boy: Time for some Smackdown. Yeah!

Gumball: Yeah, finish these bastards!

(Kamen Rider Ichigo punches Kamen Rider Eternal, grabs him and slams him down.)

CN Heroes: Ooooh.

Sonic: That's gonna hurt.

Ben 10: I hope he's got an insurance.

Blossom: I don't think they have one.

(Kamen Rider Build punches Shadow Moon, sending him to the wall while Ultraman shoots his Spacium Beam at Alien Baltan, destroying him. Meanwhile, Ultraseven stabs King Joe before using his beam to destroy him.)

Ultraseven: Another victory!

(The two Kamen Riders kick the two villains down and prepare to finish them.)

Driver: Ready, go! Vortex Finish!

Ichigo: RIDER KICK!

(They kick through both villains as they scream in pain.)

Eternal: You will pay for this, Kamen Rider Ichigo.

S. Moon: We will...

(Then they explode and both Kamen Riders and Ultras do their victory pose.)

Build: Oh yeah, baby.

(Then they turn to the Cartoon Network Heroes.)

Ichigo: I know you want answers, but you need to come with us. I'll explain everything in there.

Build: Let's go.

(Then they nod and follow them.)

(Meanwhile at the Moon Base, Zetton growls in anger.)

Zetton: DAMN IT, THEY RUINED MY PLANS AGAIN! I'LL MAKE THEM PAY!

(Then five kaijus come up. They are Gomora, Red King, Star Bem Gyeron, Bemstar, Vakishim, Eleking and Gelan.)

Zetton: Go to Earth, my friends, and destroy Ultraman and his friends.

(To be continued)