(Leonard and his friends are seen having a talk until they meet Ryuga.)

Leonard: Hi.

Ryuga: Hey, partner.

Leonard: Who are you?

Ryuga: My name is Ryuga Tatsuma-Sakurai, son of the Pro Hero Ryukyu.

Leonard: Cool. My name is Leonard Arc, brother of Jaune Arc.

Ryuga: Jaune Arc? Never heard of that name.

Leonard: It's because he studies at Beacon Academy. Or at least, he did.

Ryuga: What happened?

Leonard: When he found out my exes cheated on me, he became somewhat violent to the point he beat his bullies to a pulp.

Ryuga: Whoever were bullying him, they deserved it, right?

Leonard: Yeah. Weeks later the cheating bitches tried to force me back to Beacon, but my classmates and I put them in their place. Days later, their families planned to make me pay for what I did to them, but got beaten as well.

????: Found you, bastard!

(Leonard turns to see Team SSSN.)

Leonard: Figured out you'd be after me, Team SSSN... considering what happened to your precious dolls.

Ryuga: Ow... boo-hoo. Let me play a sad song for ya in the world's smallest violin.

(Team SSSN gets pissed by being taunted and draw their weapons.)

Sun: ENOUGH!

Sage: You're dead, bastard!

Scarlet: You will pay for what you did to our girls!

Neptune: And after that, we'll rape these girls who are with you!

Leonard: You dare threaten to rape my new girlfriends? (clenches his fists) UNFORGIVABLE!

Inazuma: Well, I was planning on using this anyway.

(Inazuma pulls out the Magma Knuckle and a fullbottle as he already placed the Build Driver in his waist. He shakes the fullbottle and places it on the Magma Knuckle.)

BOTTLE BURN!

(Ryuga places the Desire Driver in his waist, and then an orange girl comes in and does the same.)

DESIRE DRIVER!

(Ryuga turns to see his girlfriend Itsuki Kendo.)

Ryuga: Hey, babe.

Itsuki: Just shut up and let's fight, idiot!

(Both of them place the Raise Buckles in their drivers.)

SET!

(Inazuma places the Magma Knuckle in his driver as well.)

CROSS-Z MAGMA!

(Then the four prepare to transform.)

ARE YOU READY?

Leonard/Inazuma: HENSHIN!

Ryuga/Itsuki: Henshin!

GOKUNETSU KINNIKU! CROSS-Z MAGMA! ACHACHACHACHACHACHA ACHA!

NINJA!

BEAT!

READY, FIGHT!

(They transform into Kamen Riders Black RX, Cross-Z, Tycoon and Na-Go.)

Black RX: I am the offspring of the sun! Kamen Rider! Black! RX!

Cross-Z: My power is overflowing... my soul is burning... and my magma is surging!

Tycoon: Kamen Rider Tycoon, now... time to test your luck!

Na-Go: Call me... Na-Go! Nya~!

(Sage charges at Cross-Z, only to be punched and kicked by him before being slammed down. Cross-Z starts beating him to a pulp before finishing him.)

READY, GO!

(Cross-Z Magma leaps in the air accompanied by numerous Variable Magma dragons that attack Sage.)

VOLCANIC ATTACK!

(The dragons then combine with Cross-Z for an explosive flying kick, which hits Sage, reducing him to ashes.)

ACHA!

(Na-Go summons her Beat Axe.)

BEAT AXE!

(Then she prepares to attack Neptune.)

FUNK BLIZZARD!

(She charges at him)

TACTICAL BLIZZARD!

(She freezes Neptune before slashing him seven times and plays her guitar, harming him.)

Na-Go: Yeah! WHOOO!

(She then prepares to finish him.) 

ROCK FIRE!

Na-Go: The finale!

TACTICAL FIRE!

(Na-Go hits Neptune with a fire slash, finishing him. Then she jumps excitedly.)

Na-Go: Nya~!

(Tycoon slashes Scarlet before performing his finisher.)

TACTICAL SLASH!

(Tycoon slashes Scarlet in half, finishing him.)

(Black RX is seen fighting Sun, and manages to kick him away. Sun then starts shooting, but RX jumps and dodges the bullets before kicking him again. Sun gets enraged and shoots rapidly, hitting RX and bringing him down, but the sun's light empowers him and he gets up.)

Black RX: ACROBATTER!

(Acrobatter comes in, RX hops on it.)

Black RX: Let's go! REVOLCANE!

(Black RX pulls out his Revolcane, and then he jumps off Acrobatter and stabs Sun.)

Black RX: As long as there's light in this world, Kamen Rider Black RX's is immortal.

(Black RX pulls his Revolcane off Sun, and then the latter explodes. The four riders make a victory pose and the screen fades out.)