Hello, everyone! PHANTOMKNIGHTMARE47 here, with a rewrite of an old crossover fic. In this case, it's none other than Ultraman Unity! The plot goes like this: 21-year old Kenji Kasuga is an autistic college student living with some friends of his following the deaths of his parents. However, when Emperor Xalvedon has his forces give mentally shattered people objects called Monsrisers, allowing them to become Kaiju themselves. Luckily, Kenji is given the Ultra Unity Riser, and some Ultraman Fusion Cards to become the successor of Ultraman Orb, Ultraman Unity! Now, Kenji and his friends travel the Multiverse on their ship, the Cosmos Chaser, and they make new allies in their travels throughout the Multiverse, arriving in various worlds of media. Will Kenji and co. be able to save the Multiverse? Grab a soda, pop some popcorn, order a pizza, and get ready to find out in ULTRAMAN UNITY!

Disclaimer: I do not own Ultraman in any way, shape or form. All rights go to Eiji Tsuburaya and Tsuburaya Productions. Any other franchises such as Sonic, RWBY, Transformers, etc. are by their respective owners.

Pairings: OCxHarem, SonicxAmy, RubyxKid, TatsumixMine, ArchiexVeronica, JugheadxBetty, NatsuxLucy, GrayxJuvia, LevyxGajeel, DekuxHarem, SpideyxWasp, DannyxDiana, ShikixRebecca, YohxAnna, InuyashaxKagome, TanjiroxKanae, EdwardxWinry, etc.

OCs are by me, WOLFWATCHER12, Thunder2500, CyotheLion, Shot-the-Coyote777, and Lewamus Prime 2022.

I own nothing else. Read, review, and no flames!

This fic contains mild to moderate language, violence, sexual themes, and possible character death.

The Multiverse Theory, a theory discussed by the late Albert Einstein. It tells of there being various other universes similar to ours, but with numerous differences.

It cuts to a ship that resembles a cross between a Defender light-class corvette from Star Wars: The Old Republic and the Ark from Transformers Generation One. This was known as the Stellar Warrior, Onboard was a male Alien Metron named Metaro, who traveled to numerous universes

"This is a beautiful universe." said Metaro, sounding similar to Jake Shields. Suddenly, he heard an alarm, and looked to see an unknown figure in the shadows.

"Xalvedon! Should have known!" said Metaro, aggravated by this. "He must be targeting Earth for conquest."

"What should we do, sir?" said a robot that resembled Rico the Robot from PR Megaforce crossed with G-BO from Power Rangers Dino Charge. This was Geobot.

"We need to find someone with a brave heart and a kind spirit to use the Ultra Unity Riser, and stop Xalvedon from taking over the multiverse." said Metaro.

Meanwhile, we turn to Earth, in a town called Winter Bluffs, located north of Domino City. Where we see a young man with russet-brown hair and lime-green eyes doing parkour in an American Ninja Warrior style obstacle course. This was Kenji Kasuga, a college student on the autism spectrum, who lived with some friends of his following the deaths of his mom and dad. He managed to slam a button at the end of the course.

"Excellent job as always, Kenji." said the coach.

"Thanks, Coach Daniels." said Kenji, sounding like Taylor Travis from Pacific Rim THE BLACK.

"No problem, kid." said Mr. Daniels.

Kenji's Narration

"My name is Kenji Kasuga. I'm 21 years old, I was born with Asperger's Syndrome, and I'm a student at Winter Bluffs Community College. I live with some friends of mine after the deaths of my mom and dad. I never expected there to be numerous other universes aside from mine, until now. This is my story."

(Cue Song: "STRENGTH" by Abingdon Boys School)

[Instrumental] It cuts to the various Ultramen from the Showa-era, Heisei-era, and Reiwa-era, with their powers in the Ultraman Fusion Cards, and then the logo for Ultraman Unity appears.

[Kawaita kuchibiru itetsuku taiyou ni sarasarete]

It shows Kenji doing an obstacle course, and then looking at a photo of him as a child prior to his parents' passing.

[Afureru namida ga shitataru mabushisa de]

It shows Kenji's friends, Kyoya Takayama, Naoto Tezuka, and Rumiko Kanezaki, as well as Metaro and Geobot

[Boku wo nazoru kara]

It shows Emperor Xalvedon, with his subordinates, Alien Valky, Maguma, Ace-Killer, and the rogue Ultramen, Belial and Tregear

[Tarinai kasho wo tada umeau you ni kimi wo motometeita]

It shows the allies that Kenji makes in his travels throughout the Multiverse, such as Yusuke Urameshi, Edward Elric, Tsukune Aono, Naofumi Iwatani, the Avengers, the Justice League, Team Sonic, the Maximals, the Crystal Gems, Fairy Tail, Night Raid, the Black Bulls, and more.

[Fureau yubi ni tsutawaru setsunasa dake wo kakiatsumete]

It shows someone using a MonsRiser to become a Kaiju, and then Kenji uses the Ultra Unity-Riser to assume one of his forms as Ultraman Unity.

[Kodou no oku ni kazasu negai wo sadame to iu nara]

It shows Unity switching from his Zenshin Superion form, to Flame Mebium, Wrecking Deathcium, Maxim Solgent, and more.

[Nokosareta kioku to nakushita kimi no omokage ga]

It shows other Ultramen of different universes such as Seiji Crossroad/Ultraman Arc, Shane Oliver/Ultraman Zaidar, Retsu Nagai/Ultraman Cube, Shiro Higashikata/Ultraman Remnant, and others, as Setsuna F. Seiei of Celestial Being becomes the new Ultraman Zero

[Ima mo okizari no mama…]

It then shows Unity as his Zenshin Superion form, focusing energy and positioning his arms in an L-shape, firing his Stellarium Ray, defeating a monster.

(End of OP)

Chapter 1: A New Ultraman's Debut!

It shows Kenji talking with his friends, Naoto Tezuka, who was a para-athlete born with congenital amputation that was an ace at wheelchair track-and-field, Kyoya Takayama, a college kid who was an Esports athlete, and Rumiko Kanezaki. Naoto had black hair and indigo-blue eyes, and wore a Yu Yu Hakusho shirt, and jeans. He was in a wheelchair. Kyoya had brown hair and amber-gold eyes, wearing a shirt themed after a Gundam. Rumiko was a buxom girl with golden blonde hair and indigo eyes, wearing a crop-top, jean shorts, and heeled boots.

"So, how was the obstacle course, Kenji?" said Naoto, facing his friend.

"Great, you guys." said Kenji, smiling a little. "I kicked butt there."

"Good to hear, aibou." said Kyoya, smiling at Kenji.

Meanwhile, Xalvedon had sent one of his agents, an Alien Valky to find someone to bestow a MonsRiser to. He looked to see a criminal on the run.

"Perfect." said Valky, chuckling to himself. He then approached the criminal, and as the criminal turned around, Valky then handed the man a MonsRiser, with a Kaiju-Card based off of Zetton-Falx.

Later, Kenji and his friends were busy hanging out at the local youth center, playing basketball, and as they walked out, they noticed the police cornering the thug.

"Time to level up." said the thug, as he scanned the Kaiju Card through the MonsRiser

[MONSRISE: ZETTON FALX]

With that, the criminal then transformed into a towering Kaiju, much to the shock of the police-men

"What the fuck is going on?" Kenji blurted out, shocked to see what was happening. The transformed criminal cackled, and slashed at the policemen with his hand scythes, and then the military arrived.

"What the? An actual fucking kaiju!?" one of the pilots blurted out, shocked to see this.

"Shoot it!" said another pilot, as they opened fire on Zetton-Falx. The transformed criminal then focused energy into his hand scythes, and slashed at them.

"Crap, that guy's making mincemeat of the army!?" said Naoto, shocked to see this "Something's gotta be done! Wait, where'd Kenji go?"

Rumiko then saw Kenji getting people to safety, and then Zetton-Falx spotted him. He raised his scythe-hands up, ready to slash Kenji in half, until a sparkling light flew at Kenji, and enveloped him in a bright light.

Kenji's Mindscape

"What the?" said Kenji, shocked to see this "Am I dead?"

"No, you are not dead." said a voice, as Kenji looked to see a figure that resembled Ultraman Orb, but his head was a cross between Ultraman Xenon and Ultraman Hikari, with a forehead crystal, and an octagon-shaped light on his chest.

"Who're you?" said Kenji, stunned to see such a being

"My name is Ultraman Unity. I hail from the Land of Light, which is located in Nebula M-78." said the being, introducing himself. "I am here to grant you the power to stop that Kaiju."

An object that resembled the Orb-Ring, but different appeared in Kenji's hand "This is the Ultra Unity Riser." said Unity "With it, and two or more Ultra Fusion Cards, you and I will become one."

"Nifty." said Kenji, stunned by this.

"Right now, you have access to the Ultraman Decker and Ultraman Ginga cards." said Unity, explaining everything. "I chose you, because of how you've risked your life to get those people to safety. I'm counting on you."

Exit Mindscape

Kenji then took out the two Ultraman Cards, and used the Trigger card first. "Trigger!" he said, as he scanned the Trigger card through the Unity Riser

[Ultraman Trigger!]

"Ginga!" said Kenji, as he scanned the Ginga card through the Unity Riser

[Ultraman Ginga!]

"I ask of you, to please lend me your strength!" said Kenji, as he thrusted the Ultra Unity Riser upwards

[Unity Up!]

[Ultraman Unity: Zenshin Superion!]

With that, Kenji transformed into an Ultraman that resembled Trigger, with Ginga's head. He also had Ginga's Zenshin Crystals on his head, chest, forearms, legs, and shoulders.

"SHIYAAH!" went Unity as he landed on his feet. He then entered a fighting stance, and started trouncing Zetton-Falx with some kicks. Zetton-Falx then sent some energy slashes with his hand scythes, but Unity dodged the attacks.

Unity then looked to see his Color-Timer blinking red and beeping, making the same noises as Trigger's Color Timer crossed with Decker's Color Timer.

"What's going on?" said Kenji, stunned to see this.

"An Ultraman can be active on Earth for a good three minutes." said Unity, explaining everything. "Once that time is up, you'll be forced to power down. So make your next attack count."

"Got it." said Kenji, nodding in confirmation, he then kept thrashing and bashing Zetton-Falx with his bare fists and kicks, and he focused energy like Trigger crossed with Decker, and positioned his arms in an L-shape

"STELLARIUM RAY!" said Unity, as he fired an Ultra-Ray which was all seven colors of the rainbow, defeating Zetton-Falx, and there was a huge explosion. The criminal was out cold, and his MonsRiser and Kaiju Card both disintegrated

"Unbelievable…" Valky gasped, shocked to see such a thing.

Later, after Kenji turned back to normal, they noticed the Stellar Warrior having landed, and Metaro exited the craft with Geo-Bot

"So, you are the youth who obtained the Ultra Unity Riser?" said Metaro, perplexed by this. "My name is Metaro, and with me is my companion, Geo-Bot.

"Hello there." said Geo-Bot, sounding like Cogman from Transformers: The Last Knight.

"My name is Kenji Kasuga," said Kenji, introducing himself. "These are my friends, Naoto Tezuka, Kyoya Takayama, and Rumiko Kanezaki."

"Hello there." said Naoto, introducing himself

"Hi there." said Kyoya, bowing in respect

"Hiya." said Rumiko, bowing in respect.

"It's a pleasure to meet you all." said Metaro, "Listen, the evil emperor, Xalvedon, has targeted the Multiverse for invasion. And it's up to all of us to stop him. Will you help me?"

"If it's to keep our universe, and others like it safe, then yeah, we're in." said Kenji, nodding in confirmation.

"Good to hear." said Metaro. With that, Kenji and co. boarded the Stellar Warrior, and the craft then took off through a dimensional portal.

(End of Chapter 1)

(Cue Ending Song: "Jounetsu No Kaze" by The Inazuma Sentai)

jounetsu no kaze ni senaka osarete

oretachi wa taorenai daiboku sa

namida wo sueba

kagayaku hana wo sakaseru n da

sora ni tsuki ga ukande

negai goto suru yo ni miagete tanda

sou oretachi wa erabareshi EESU janai kedo

jounetsu no kaze ni senaka osarete

oretachi wa taorenai daiboku sa

namida wo sueba

kagayaku hana wo sakaseru n da

joushou suru kokoro wa yari tonari

machi ukeru kabe wo kowase jounetsu!

sore shikanai kedo

sore sae areba make ja shinai

(end of ED)

Next time, on Ultraman Unity, Kenji and co. arrive in the universe of Totally Spies and Martin Mystery, where they meet the members of WOOHP and The Center, and work with them to stop a kaiju attack in Beverly Hills, California. However, Mandy, an arch-nemesis of Sam, Clover and Alex, is given a MonsRiser with a Kaiju Card of Camerera, one of the Giants of Darkness fought by Ultraman Trigger, Kenji is given a fiery new form to combat her. Will they be able to save Beverly Hills from destruction? Find out in Chapter 2: Kaiju Attack on Beverly Hills!