Let me get one thing straight, I have no ownership over any Kamen Rider Series.

Warning: May be alternate versions of each Rider, supporting Rider, supporting characters, etc.

For W: One female, one male make up Double.

While there are AU's and OC's and stuff, I'm gonna try to stay true to the original character's personality. May be a bit of OOC.

Double: Forming the A, S Arrives!

Julian, Tabby, Axel, Jordan, Ankh, and Alvin had been alarmed by Joe's Gorilla Candroid, which had them on the Hardboilder, Diablossa, and Ride Vendors respectively heading toward what was thought to be a Greed attack. Joe's injuries were too much for him to go with the others, so he stayed behind with Kougami's personal assistant, Erika Satonaka.

Not to mention, Adonis agreed to stay behind to make sure Joe didn't do anything reckless.

It had to be Cazali, who else was it? Just as the Riders and their allies were halfway to their destination, a man blocked their path.

"I cannot let you interfere with Cazali's activities," Kiyoto Maki said in a low voice as he stared at the doll on his arm.

The Riders and their friends stopped their bikes. Ankh got off of his bike.

"Get out of the way, Maki!" the bird Greed yelled, advancing toward Dr. Maki.

The good doctor pointed toward the sky, where moments later, fireballs rained down from the sky. The Riders and their allies were forced to scatter to avoid the orange balls of death. Accompanying the fireballs was a cougar-like monster that adorned the wings of a dragonfly.

"As I said moments ago, I cannot let you pass," Dr. Maki said. "You'd be interfering with a perfect end. I suppose this... Dopant Yummy can take care of you."

Alvin, with the Birth Driver in hand and the milk jug he had known Joe to carry on his shoulder, stepped forward.

"Friends, please advance. I will deal with this Yummy. You need not be tied up here."

"You better not die, Alvin Saint," Jordan snapped. "You do, and I'll kick your ass for all the work I'll put in to pull you out of hell."

"Don't worry," Axel added, removing his glasses. "I'll make sure your friend comes back in piece."

The former police officer stepped forward as he and Alvin watched their friends move forward.

Alvin grit his teeth, swinging the Birth Driver as it latched around his waist. This is what he had been training for, though it was much too early. Joe had yet to earn that $100,000,000 he wanted.

"Henshin."

"Hen... shin!"

It wasn't Alvin's time to become Birth, but it was now or never. He produced a Cell Medal from his shirt pocket before entering it into the slot on the left side of his belt, followed by pulling the switch on the right.

"Accel!"

Axel pressed the button on his Gaia Memory as a belt with motorcycle handlebars appeared on his waist. He inserted the Memory into the belt, revving up the right handlebar. Moments later, his own transformation was completed.

A pop sound could be heard as the pieces that made up Birth appeared out of the belt and covered Alvin, which completed the transformation.

Before the fight could begin, the Dopant Yummy was knocked forward with a barrage of gunfire. Dr. Maki and the Yummy turned around, taking notice of a man on a black motorcycle wearing a black duster and cowboy hat. He looked past the doctor and monster to the two Kamen Riders.

"Your friends are going to need all the help they can get fighting that Greed," the man said, holding a Winchester rifle one-handed and pointing it at Dr. Maki. "Get going! I'll handle this freak and his monster."

The man pulled the trigger, managing to effectively decapitate the doll on the doctor's wrist. This result forced Dr. Maki to back up, before running off.

"Who are you?" asked Axel.

"A friend," the bike-riding cowboy replied. "You can call me Slinger. If this were a movie, I'd be the fastest-drawing Rider in the Old West. Now, go!"

Axel and Alvin nodded as they mounted their bikes and took off as the new entrant turned his rifle on the Yummy.

"Okay, monster, it's just you and me now."

The gunslinger holstered his rifle on his back, as he opened his coat. A black belt was around his waist, the buckle shaped like a semi-automatic pistol. In his hand was a magazine that he loaded the pistol with as he cocked it.

"Henshin!"

"LOCK AND LOAD."

The mysterious man was covered in black armor, his coat and hat still there. When his transformation finished, he drew the pistol from the belt. It had grown in size and taken the form of a revolver, but with a wickedly curved shape.

"The name is... Kamen Rider Slinger. And it's time to get blasting!"

The black-clad Rider advanced, pulling the trigger on his pistol. Black and purple balls of energy emitted from the weapon and hit the monster repeatedly. Slinger holstered his weapon before running toward the monster, delivering a jumping kick to its chest and following up with with a front kick under the Yummy's chin. The Yummy swung its right arm, missing the intended target as the Rider threw a combo of punches to the body.

"I think it's time to end this, wouldn't you say?" Kamen Rider Slinger asked.

Slinger removed the pistol, and placed into a second holster on his hip. He revealed a red magazine, inserting it into his belt before cocking it.

"FULL CLIP GO."

The Kamen Rider ran toward the monster, his momentum allowing him to soar into the air. One of his knees were extended as he advanced on the Yummy.

"Gunslinger Sting!"

Slinger's knees connected with the Yummy's chin in succession before he soared past the Yummy and touched down at the moment the monster fell to its back and triggered an explosion behind him.

"This fight's been blown away."