Hello, everyone! PHANTOMKNIGHTMARE47 here, with the fifth chapter of Kamen Rider Nebula! In this chapter, Nakashima and co. arrive at the universe of Teenage Mutant Ninja Turtles, where they meet Leonardo, Donatello, Raphael, Michelangelo, and their allies in New York City. However, a new Darkmare arrives to cause problems in NYC, and Nakashima/Nebula gains access to a new form to turn the tide of battle. Plus, he gets help from a veteran Kamen Rider, Sento Kiryu, AKA Kamen Rider Build!

Disclaimer: Same here

It shows Nakshima doing some push-ups in his bedroom, wearing his skivvies as he was working out, using his bed as support as he was doing so. He then stopped exercising, and then took a drink of strawberry lemonade flavored Powerade.

"That'll keep myself hydrated." said Nakashima, as he wiped some sweat from his brow. He then headed to the mess hall to join the others for breakfast.

"Today's breakfast is souffle pancakes with freshly sliced fruit, turkey bacon, plant-based sausages, and scrambled eggs with spam and sharp cheddar." said Jonah, as he revealed to have made breakfast for everyone.

"Thanks, Jonah." said Nakashima, as he sat down for breakfast.

"Itadakimasu!" said Nakashima and the others, as they then started eating.

"Yum! This is absolutely delicious!" said Clover, smiling.

"After breakfast, we'll be heading to the universe of Teenage Mutant Ninja Turtles. So, after we're done eating, wash your dishes and strap in." said Raymond, facing the group.

After everyone was finished eating, they washed and cleaned their dishes, and strapped in as the Nebulonius flew through a dimensional rift.

(Opening Song: "The Howl Towards Tomorrow" by JAM Project Plays)

[Instrumental]

It shows the various Kamen Riders: Ichigo, Nigo, V3, RiderMan, X, Amazon, Stronger, Skyrider, Super-1, BLACK, BLACK-RX, Shin, ZO, J, Kuuga, Agito, Ryuki, Faiz, Blade, Hibiki, Kabuto, Den-O, Kiva, Decade, Double, OOO, Fourze, Wizard, Gaim, Drive, Ghost, Ex-Aid, Build, Zi-O, Zero-One, Saber, Revice, and so on, as it then showed Nakashima.

[Tachiagare kedakaku mae sadame wo uketa senshi yo]

It shows Nakashima, with his friends, Daigo Kanezawa, Courtney Tezuka, Carter Tezuka, and Masato Hozuki, as they sit at a hill.

[Sen no kakugo mi ni matoi kimi yo ooshiku habatake!]

It shows the group get to their feet, and are headed to a location, as the logo for Kamen Rider Nebula appears.

[Yami no jidai wo tsugeru kane ga tooku nari hibiku]

It shows Nakashima training in the local dojo, whereas Daigo is playing video-games, Courtney is practicing dance, Carter is doing motocross, and Masato is drawing.
[Tatakau tomo yo ima kimi ha shi mo osorezu]

It shows Nakashima's relatives, and some more of his school-friends. As well as the allies Nakashima makes in his interdimensional travels, such as Tsukune Aono, Kenichi Shirahama, the Agents of W.O.O.H.P, the Maximals, the Crystal Gems, Danny Phantom, Team Sonic, the Knights Of The Watch, the Order Of Mata-Nui, Ruby's Group, the Avengers, the Justice League, U.A High-School Class 1-A, Inuyasha, the Elric Brothers, the French Miraculous Superhero Team, and so on.

[Gareki no machi wo somete shizumu yuuhi ha kurenai]

It shows the members of the Allied Multiverse Protection Squad, composed of Raymond Thompson III, Professor Jeremiah Broslowski, Dr. Jonas Bogard, Field Captain Genjiro Shimada, and Lieutenant Ayame Kanezawa.
[Aisuru hoshi no mirai wo mamoru tame]

It shows the Giganoidians, which were composed of the swordsman, Zankord, the war-general, Gextral, the assassin, Kenvardon, the jester, Gyrax, and their leader, Giganidas.

[Oo kami no yaiba ha hito no ai]

It shows the people running, as the Blightoids terrorize the people, until Nakashima manages to fend some of them off.
[Inori wo komete tsuranuke!]

Nakashima does the movements needed to transform, and says "Ectophase Activate!", as he then transforms into Rider Form.

[Tachiagare kedakaku mae sadame wo uketa senshi yo]

Nebula then fights against the Blightoids in hand to hand combat, until he slides a Grid-Card across the top of his belt, summoning a sword.
[Asu no heiwa he no ishizue to nare]

Nebula then slashes and slices through the Metaborgs with his weapon, cutting them down.
[Atsuku nare ookiku sake ten ni sasageshi inochi yo]

It shows several other Riders, ready to help in defeating the Giganoidians, as Nebula fights Zankord in a sword-duel.
[Yowakimono no tate to nare soshite sekai wo michibike]

Nebula does his Galactic Rider Kick on a Darkmare, destroying it in a single hit, before driving off on his motorcycle.

(End of OP)

Chapter 5: Meeting The Mutant Heroes!

Location: New York City

The Universe of Teenage Mutant Ninja Turtles

The Nebulonius then landed in the outskirts of town, and Nakashima and his friends then exited the craft alongside Tsukune, Moka, Ginei, Danny, Tucker, Jazz, Sam, Clover, Diana, Martin, Tony, Lee, Marc and Megan.

"New York City looks absolutely amazing at nighttime." said Lee. He then noticed a commotion.

"The heck was that?" said Marc, stunned. They then looked to see some ninjas arrive.

"HOLY SHIT! Ninjas in NYC?" said Lee, shocked.

"Lee Clark, mind your language. You're only fourteen years old." said Clover in a strict tone of voice.

"Right. Sorry, Clover." said Lee, as the gang got into fighting stances.

"Need a hand?" said a voice, stunning the others.

The gang looked to see a group of humanoid box turtles. The first had dark-green skin, sapphire blue eyes, and wore a blue ninja mask, and a blue sash that had a belt buckle with an "L" on it. The second had olive-green skin, reddish brown eyes, and wore a purple ninja mask, and a purple sash that had a belt-buckle with a "D" on it. The third had kelly-green skin, and green eyes, and wore a red ninja mask, and a red sash with a belt-buckle that had an "R" on it. The fourth and final turtle had light-green skin, baby-blue eyes, and wore an orange ninja-mask, and an orange sash that had a belt-buckle with an "M" on it. These were the Teenage Mutant Ninja Turtles, four ordinary box-turtles mutated into a humanoid form by an unknown substance, trained in the art of the ninja, and named after Renaissance-era Europe artists. The leader, Leonardo, had dual katanas, the one in purple, Donatello, had a bo-staff, the one in red, Raphael, had dual sai, and the one in orange, Michelangelo, had two sets of nunchucks.

"What the? Giant humanoid turtles?" said Gabriella, rubbing her eyes in disbelief. "I must've drank too much coffee this morning."

"It's Ninja Time!" said Leo, as he and his brothers helped Nakashima and co. in fighting against the enemy ninjas. Leo managed to counter each of the ninjas' strikes with his own swords, and knocked them out using the back of his ninjaken. Mikey thrashed another with his nunchucks, Raph unleashed a flurry of sai strikes, and Donnie pummeled another with his bo-staff. The ninjas then made a break for it.

"The Foot Clan are getting out of hand." said Leo, as he sheathed his weapons. "Welcome to New York City, by the way. My name's Leonardo. The one in purple is Donatello, the one in red is Raphael, and the one in orange is Michelangelo."

"Hello there." said Donnie.

"Yo!" said Mikey, smiling.

"'Sup?" said Raph

"My name is Nakashima Kazuma, and these are my friends, Carter Tezuka, Carter's sister, Courtney, Ayame Kanezawa, Professor Jeremiah Broslowski, Tsukune Aono, Tsukune's cousin, Kyoko, Moka Akashiya, Ginei Morioka, Sam Simpson, Clover Ewing, Alex Vasquez, Lee, Marc, Tony and Megan Clark, Martin Mystery, Diana Lombard, Danny Fenton, Danny's older sister, Jazz, Tucker Foley, Kwan Li and Star Strong."

"Let's take you to meet our friends too." said Leo, as he led the way.

Meanwhile, we see a new Darkmare make an appearance. It resembled a humanoid Japanese rhinoceros beetle with a crimson red color-scheme and dark-blue eyes. This was Kabuterror.

"Soon, this world and others like it shall kneel before the Giganoidian Army!" said Kabuterror, chuckling darkly.

Elsewhere, we see another Legend Rider arriving in NYC, this was Sento Kiryu, AKA Kamen Rider Build. Sento was originally a scientist affiliated with Touto Institute of Advanced Matter Physics known as Professor Takumi Katsuragi, who was known as the 'Devil Scientist' Professor Katsuragi developed the Rider System, but after learning of Faust's true colors, even though the Rider System was meant for combatting an alien named Evolt from the planet Blood, Prof. Katsuragi's memories were altered by Evolt, who switched his appearance with that of Taro Satoh. Now as an amnesiac man going by Sento Kiryu, he used the Rider System to combat monsters known as 'Smash'.

"New York City looks rather breathtaking during the nighttime." said Sento, smiling a little as he headed off.

Meanwhile, it shows Nakashima and his friends meeting the Turtles' adoptive father and sensei, Master Splinter, who used to be a human man known as Hamato Yoshi, but was mutated into a humanoid gray rat by an alien mutagen. With them was April O'Neil, a news reporter, Casey Jones, a street vigilante, Leatherhead, a mutant alligator working with the Utrom as a bounty hunter, and Slash, a mutant alligator snapping turtle.

"So, you say that you're from other worlds?" said Leatherhead, sounding similar to Pete from the Mickey Mouse cartoons, with a Cajun accented voice.

"That's right." said Nakashima, nodding in confirmation.

"Then that must mean that the Multiverse Theory that was conceived by Hugh Everett is…" said Donnie, stunned

"Real? Yep." said Tsukune, nodding in confirmation.

"What's your backstory?" said Ginei.

"Well, back when I was a human, I bought four baby box turtles from the local pet store when I first moved to the United States." said Splinter, telling his and the Turtles' backstory. However, I had an encounter with aliens known as the Kraang. I fought against them, but a canister of their mutagen came into contact with me. Due to me coming into contact with a gray rat, I was turned into a mutant rat, and the baby turtles were mutated into humanoids due to the fact that they were with me."

"Damn…." said Clover, shocked.

"When I was young, I aspired to be a great artist, and I loved Renaissance era artwork. So, I gave the four turtles, my adoptive sons, names: Leonardo, Donatello, Raphael, and Michelangelo." said Splinter.

"I met the turtles when they saved me from the Foot Clan." said April, revealing how she met Leo, Mikey, Raph and Donnie.

"I encountered Raph when he was leaving the movie theater," said Casey.

"I used to be a pet alligator owned by a child, until the child's parents had him get rid of me. I was mutated by the Utrom Council and became their bounty hunter." said Leatherhead.

"Slash here was a normal Alligator snapping turtle, who was mutated by Baxter Stockman into a giant, hulking, nine-foot-tall behemoth." said Donnie, explaining everything.

"Holy moly…" said Marc, stunned. The group then got a news report.

"NYC Police are getting reports of what appears to be a giant humanoid Japanese rhinoceros beetle causing problems in Times Square." said a reporter.

"It's another Darkmare attack. I'm on it." said Nakashima. He was given two red GridCards.

"You'll need these. One allows you to access a new form, the other allows you to summon a weapon that coresponds to the new form." said Jeremy, explaining everything.

"Got it." said Nakashima. With that, he saw his second Rider Machine, Stellar Cruiser arrive, so he got into the driver's side, and sped off.

We then looked to see Kabuterror walking towards the NYC SWAT team, with their bullets bouncing off of his ultra-tough exoskeleton.

"Tickles. Now, it's MY turn!" said Kabuterror, as he focused red energy into his fist, and smashed the ground, creating an energy shockwave that shattered windows and sent the SWAT team flying.

"Hold it right there!" said Nakashima, as he arrived. He then did a combination of the transformation poses used by Kotaro Minami as BLACK RX and Ryo Murasame as ZX.

[HENSHIN]

"ECTOPHASE ACTIVATE!" said Nakashima, as he transformed into Rider Form. He wore lion-themed armor colored like Ryukendo in his base form, but his helmet had golden-yellow colored optics on it."

"I am the child of the cosmos, KAMEN RIDER NEBULA!" said Nebula, posing. Kabuterror then snapped his fingers.

"METABORGS!" said Kabuterror, as the grunts then appeared. Sento walked up to Nebula.

"Hey! You're…you're Sento Kiryu, AKA Kamen Rider Build!" said Nebula, surprised to see one of his Senpai Riders here to lend a hand.

"Yep." said Sento, as he attached the Build-Driver to his waist. "Now then…" he began, as he held the Rabbit Fullbottle in his left hand, and the Tank Fullbottle in his right hand. "Let's begin the experiment, shall we?" He then shook the two Fullbottles, and twisted the tops of them. He then inserted the Rabbit Fullbottle into the left port, and then the Tank Fullbottle in the right port.

[Rabbit! Tank! BEST MATCH!]

Sento began to turn the crank on his Build-Driver, as what appeared to be model kit templates made of glass tubes

[Are You Ready!?]

"Henshin!" said Sento, as he then entered his base Best Match form.

[The Heavy Metal Moonsault! RabbitTank! (YEAH!)]

"The laws of victory are in effect!" said Build. Nebula then slides the new GridCard across the top of the NebulaRiser.

[Inferno System, Engage!]

(BGM: "Burning My Soul" by J-CROWN & TaKu Plays)

Nebula's armor then turned red, orange and golden, with flame decals on the gloves and boots. His optics had turned lime green as well.

"Now I'm all fired up, baby!" said Nebula. He then thrashed the Metaborgs with fiery punches, kicks and chops, and knocked them down one by one. Build then summoned one of his weapons.

[Drill-Crusher!]

A sword with a drill-shaped blade appeared in Build's hand, as he then slashed several Metaborgs down. He then converted his weapon into a gun and shot them down. Nebula then slid another GridCard across the top of his belt.

[Blaze Knuckles, Equip On!]

With that, a pair of knuckle weapons similar to Ember Celica from RWBY then appeared on Nebula's hands and forearms. He entered a boxing stance with them, and then fought against Kabuterror one-on-one.

"You're nothing but a weak, insignificant little Human playing superhero!" said Kabuterror. "And I'll prove it by peeling your armor off of your corpse!"

"I'd like to see you try, jackass!" said Nebula, as he headbutted Kabuterror in the face.

"OWWWW! My nose! You broke my fucking nose, you jerk!" Kabuterror barked, frustrated.

"BLAZING ONSLAUGHT!" Nebula exclaimed, as he then thrashed Kabuterror with a Star Platinum-style barrage of punches. Build then inserted the Rabbit Fullbottle into the DrillCrusher in its sword mode.

[Ready? (GO!) Vortech Break!]

Build then slashed Kabuterror across the chest with his weapon, and then Nebula focused fiery energy into his left fist.

"Burning Breaker!" said Nebula, as he then delivered a powerful right cross to Kabuterror.

"I'LL BE WAITING FOR YOU…IN HELL…!" Kabuterror bellowed, as he fell backwards and exploded.

"We kicked butt out there." said Nebula, as he did a knuckle-bump with Build.

"Yes, I suppose we did." said Build, as he hopped onto his motorcycle. "I will be seeing you sometime in the near-future." with that, Build then drove off.

Later, it shows Nakashima and the gang with the Turtles boarding the Nebulonius, ready to head to their next destination.

"Alright, everyone. Our next destination is the universe of Star Wars." said Raymond. "We'll be helping the Rebel Alliance, Partisans, and any surviving Jedi in facing off against the Empire."

"Nice!" said Mikey, elated.

With that, once everyone got onboard the Nebulonius, the craft then lifted off and flew through another dimensional rift.

(End of Chp. 5)

(Ending Song: "Polaris" by BLUE ENCOUNT plays)

It shows Nebula riding his motorcycle on a racetrack during a cloudy day

Ano hi "mamoru" to kimeta

Yakusoku wa kono mune ni

Subete wo ushinau koto de

Ima sukueru inochi ga aru no nara

Yorokonde zenbu wo ageyou

Kono kimochi ga hajimete no ikigai da

Kizuato wa kakusanaide

Zetsubou mo buki ni shite

Ikiru to kimetan da yo

Seiippai kono namida kakiwakete

Kimi ni subete wo ageru kara

Onegai dou ka kienaide kure

Ano hi "mamoru" to kimeta

Yakusoku wa kono mune ni

Kiesou na hikari da to shitemo ike!

(End of ED)

Next time, on Kamen Rider Nebula, Nakashima/Nebula and co. arrive in the universe of Star Wars, where they meet the crew of the Ghost, the crew of the Stinger Mantis, Clone Force 99, and two groups of Anti-Empire freedom fighters/heroes-for-hire, with both groups being led by survivors of the Siege of Mandalore. However, a new Darkmare has been tasked with assassinating Mon Mothma and Saw Guerrera, and it's up to Nakashima/Nebula to stop it in it's tracks. He even teams up with a Senpai Rider in the form of Gentaro Kisaragi, AKA Kamen Rider Fourze! Will Nakashima/Nebula and Fourze be able to stop the assassination attempt and keep Mothma safe? Find out in Chapter 6: Space Heroes, Switch On!