"Yo Finn, wait up!" Jake said before he stretches open his mouth and dumps the rest of his breakfast into him. Finn rushes out of the restaurant to see a stampede of fleeing civilians. "Get ready for anything, Jake." Finn told Jake as he reaches into his backpack. Emerging from a cloud of dust is a monster, but not one they recognize, one with green insectoid legs, yellow tiger claws, and a red bird-like head with razor-sharp teeth and green bug eyes. On its chest harness is an emblem of three silver rings, spelling out "OOO".
Finn brandishes his Night Sword and prepares to attack. "Back off, man." Finn told the monster. It lets out a roar before dashing at Finn and Jake. It clashes its claws against Finn's sword before it's suplexed from behind by Jake, slamming it belly-down on the pavement. They notice the numbers "3047" written on the back of its harness.
"Those are the same numbers…" Finn noted. The monster flips back up and charges back at them, but a blue sword is suddenly flung into his arm. The adventurers focus their attention to the source; a warrior wearing similarly-coloured armour to the monster, additionally wearing a blue belt that has a tilted rectangular buckle containing three traffic-light-coloured tokens. "[Hey, leave the tourists alone!]" the warrior exclaimed. The monster tears the sword from his arm and charges at the warrior.
The warrior deploys claws from his golden gauntlets and the two clash, engaging in close-quarters combat. The fight appears to go nowhere before the warrior kicks the monster in the stomach. The warrior tilts his buckle to horizontal position to remove the red and yellow tokens before replacing them with two green tokens. He tilts the buckle back into position and slides a circular device over it, a cling sounded for each token. "Kuwagata! Kamakiri! Batta! Gata Gata-Gata-KiriBa! GataKiriBa!" the belt announced in a furious voice.
The warrior transforms into a predominantly-green form with pincer shaped horns on his helmet. The monster charges at him, only for the warrior to split into two clones that slash the monster on both sides. The monster tries to attack both, but they each split into two more, creating four clones in total. The clones overwhelm the monster with superior numbers at they duplicate themselves. They cut through the monster like a swarm of locusts until it's covered in hundreds of shallow gashes.
The warriors once more scans their belts with the circular device. "Scanning Charge!" their belts announce as the clones jump high into the air. When they reach maximum altitude, they prepare to dropkick the monster as they fall to the ground at high speed. The monster looks up to see the clones shooting towards him like missiles before they bombard it with explosive kicks, destroying it in a great explosion. Emerging from the flames is a single instance of the warrior in his default form, walking towards the awestruck adventurers.
"Dude, that was so cool…" Jake commented. "Thanks for the assist, but we could've handled it." Finn said. The warrior's armour disappears in a flash, revealing a man with scruffy hair, wearing colourful, but ragged clothing. "Are you okay?" the man asked them. "We're good, man. Sweet armour, by the way." Finn thanked the man.
"I'm just doing what should be done. When I see someone in need of help, I help them, no matter who they are." the man told them. "Preach." Jake said. "Oh, your dog talks…" the man said awkwardly. "Oops, I'm not supposed to do that." Jake said. "Don't worry, I've seen much weirder lately." the man assured.
Emerging from the fire is a small silhouette, revealing to be a partly-melted wax guy wearing a charred leaf tunic. "Huh?" the man said in surprise. "Is that Waxman?" Finn wondered. "Whuh… where am I?" Waxman said as he rubs his head before being swiftly pulled into a small portal. "Where did he go?" the man wondered, just before Finn and Jake themselves disappear behind a curtain of rippling reality.
As he wonders where they went, a pebble is thrown at him. He turns around to see a man with stylish brown hair, wearing punkish clothing consisting of red pants, and a jacket with a red right sleeve. "[Eiji, what are you doing here?]" the punk asked the man. "[Ankh! I… don't know, actually.]" Eiji said, forgetting his encounter with the adventurers. "[Well, don't just stand there! There's another Yummy somewhere!]" Ankh said.
The two adventurers suddenly find themselves in a rainy alleyway, stumbling over boxes and trash. They shake detritus off them as they stand up. "What happened?! How did we get here?!" Jake wondered. They look up to see The Barista holding an umbrella. "Hisashiburi." he said casually.
"You again." Finn said as he faces The Barista. "Mind telling us what in the hay is happening in this universe?" Jake asked The Barista. "Gladly." The Barista answered as the rain lets up, allowing him to close his umbrella. They sit outside a café in an alleyway named "caffé nascita" where The Barista drinks a cup of coffee. "What do you want to know first?" The Barista asked the adventurers.
"Who are you really?" Finn asked him. "I'm a traveller, looking for a home." The Barista answered. "We want a name, man." Jake said. The Barista smiles and puts down his cup. "My name is Kadoya Tsukasa; Destroyer of Worlds." he answered.
"Destroyer of Worlds… you told us that the day you blew up that building in New York." Finn commented. "You some kinda evil mastermind with a title like that?" Jake asked. "It was just a name leftover form a failed prophecy I was involved in." Tsukasa scoffed. "What were you doing in our universe with all those test stuff you put us against?" Finn asked. "I decided to travel outside of my home Multiverse for the first time. When I did, I felt like something was forcing me into your universe, stranding me there with those other two. Our powered were apparently nullified to some point, so we had to find a way out somehow. After some time, we found you and decided to push you in the direction that would benefit both you and us. One thing that we three had in common was that we preferred teaching the hard way." Tsukasa answered.
"Enough with backstory stuff. Prismo said you've been defeating these time-changing monsters all over Ooo that made everyone forget they even existed. What's up with them? And who was that with the mirror portal?" Jake asked hurriedly. "In this multiverse, there are heroes that call themselves Kamen Riders who fight for justice, humanity, the future, friendship; and everything that is good." Tsukasa explained. "What does that have to do with those monsters?" Finn asked. "They are Another Riders, creatures that steal the power of the Kamen Riders, and stand against everything they represent. Normally they are created through RideWatches that contain their power, but when I arrived in your universe, my own was split into these Another Riders. Aside from guiding you to surpass the boundaries of your universe, I fought them with whatever power I could muster, as I was already weakened when I gave away half of my power for safe-keeping." Tsukasa answered. "What kinda powers did you have to make these random-looking monsters, like I think Prismo showed one that's an astronaut orc." Finn asked. "In every universe I visit, I am gifted with a piece of a Kamen Rider's power." Tsukasa answered.
"What about that guy that stole the clock monster? Who was that?" Finn asked. "I don't know, but I do know he intends to use the power of that Another Rider, Zi-O, to bring back someone or something from the past. When you arrived in this universe, you ended up in the year Twenty-ten, during which Kamen Rider OOO was active. What he saved you from was Another OOO, pulled from the past of your universe before I destroyed him." Tsukasa explained. "Why did he turn into Waxman after he was defeated?" Finn asked. "Another Riders require a host to exist. Another OOO's host was that of the former King of Ooo. Many of your closest friends and enemies became such creatures, but were saved thanks to me." Tsukasa elaborated. "We gonna to see more of them? Jake asked.
"Perhaps, but Another OOO's manifestation may just be an experiment to test Another Zi-O's ability." Tsukasa suggested. "We're facing against a time-travelling villain?" Finn asked. "Most likely. I've been trying to find another Kamen Rider to help me, but you two will do for now." Tsukasa answered. "Where would be even begin looking?" Jake wondered just before they hear an explosion far away. "A tell-tale sign of danger. Come." Tsukasa said as he stands up and walks away.
They travel to the scene of the explosion at a metal refinery where workers flee from the main factory. Emerging from the factory is an armoured drider with an orange and green exoskeleton. "A Dispider, one of Kamen Rider Ryuki's earliest foes." Tsukasa said. "A spider monster? We can handle it." Finn said as he brandishes his Night Sword. He and Jake run towards the monster, who rapid-fires needles at them.
Finn takes the lead and smacks the incoming needles out of the air before jumping at the monster, landing on one of its forelegs. He takes a couple slashes at the Dispider's main body before jumping back down. Before he lands on the ground, Jake stretches into a trampoline to allow Finn to jump high in the air. Jake coils up to Finn's altitude and stretches into a spring to launch Finn towards the Dispider. Finn straightens his body with his Night Sword thrust forward, and he flies into the Dispider's main body, impaling it and destroying it in a great explosion.
Finn lands on his feet as Jake coils back down beside him. Tsukasa watches the fight whilst sitting on a beach chair. "Still got it." Finn said confidently. "Something's wrong. Mirror Monsters are invisible to normal humans, and they don't usually fight in this dimension without being contracted." Tsukasa commented. Suddenly, an energy ball is flung next to them and explodes, kicking up dirt and dust.
They look to the source and see the warrior in black armour walking towards them. "It's the mirror portal guy." Finn commented. "Who are you, and what do you want with Another Zi-O? Are you a Time Jacker?" Tsukasa asked. "I am Lieutenant Zervas of the Northern Karshian Armed Forces. That is all I am at liberty to say." the warrior answered. "We'll see about that." Tsukasa said as he pulls out his metal book.
Before anyone could act, an insectoid creature resembling a walking beetle pupa with a skull-like face, a clawed hand with long fingers, and a large head horn stumbles on some barrels as it rushes into the scene. "[Stop right there, villain! Prepare to face the wrath of Kamen Rider ChopHopper!]" the alien spoke in Japanese with a nasally voice. It leaps at Zervas and morphs into a Kamen Rider wearing armour composed of a black trench coat with yellow stripes along the sleeves, black pants with similar stripes, a pink T-shirt displaying Japanese letters, a belt with a forwards-facing robotic grasshopper in place of a buckle, and a green helmet mimicking a grasshopper's head. "Rideeer Chooop!" he yelled as his hand surges with electricity, ready to chop Zervas. The Lieutenant holds out his hand and contains the alien in a stasis bubble.
"Where were we?" Zervas said as he faces the heroes. "Where's the monster you captured?" Finn asked as he held his Night Sword. "The Another Rider is none of your concern. What should be your concern is your futile survival!" Zervas screamed before throwing an energy ball at them. The three dodge out of the way before the explosion blows up the ground. "All hail General Xaviax!" Zervas screamed.
To be continued…