Nebulasteam Gun

This article is about a weapon/transformation device in Kamen Rider Build.

Nebulasteam Gun
Item Information
Type	Transformation Device Gun
Compatible Items	Gears Steam Blade
User(s)	Kaisers Kamen Rider Rogue Kamen Rider MadRogue
Series	Kamen Rider Build
First Appearance	Kamen Rider Heisei Generations Final: Build & Ex-Aid with Legend Riders
Latest Appearance	Build NEW WORLD: Kamen Rider Cross-Z Full list of appearances

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"Gear (Gear name)!"

―Gear insertion announcement^[src]

"Crocodile!"

―Crocodile Crack Fullbottle insertion announcement^[src]

"Lost Match!"

―Fullbottle without Best Match insertion announcement^[src]

"Fullbottle!"

―Other Fullbottle insertion announcement^[src]

"Funky! (Eletronic music and engine revving) Engine Running Gear!"

―Engine Bro's/Kaiser Reverse transformation announcement^[src]

"Funky! (Rhythmic beeping) Remote Control Gear!"

―Remocon Bro's/Kaiser transformation announcement^[src]

"Gear Engine! Gear Remocon! Funky Match! Fever! (Rhythmic beeping and engine revving) Perfect!"

―Hell Bro's/Bi-Kaiser transformation announcement^[src]

"Funky Drive! (Gear name)!"

―Finisher announcement with any Gear^[src]

"Funky Finish!"

―Hell Bro's finisher announcement^[src]

"Funky Break! Crocodile! (Scream)"

―Finisher announcement with the Crocodile Crack Fullbottle^[src]

"Funky Attack! (Lost Match/Fullbottle)!"

―Finisher announcement with any Fullbottle^[src]

"Rifle Mode! Funky!"

―Combination with Steam Blade announcement^[src]

"Funky Shot! (Gear name/Lost Match/Fullbottle)!"

―Rifle Mode finisher announcement with any Gear or Fullbottle^[src]

"Funky Shot! Crocodile! (Scream)"

―Rifle Mode finisher announcement with the Crocodile Crack Fullbottle^[src]

The Driving Scale Smoke Pistol Nebulasteam Gun (駆鱗煙銃 ネビュラスチームガン, Kuroko Enjū Nebyura Suchīmu Gan) is the transformation device and personal weapon of the Kaisers, as well as the personal weapon of Kamen Rider Rogue and Kamen Rider MadRogue. It combines with the Steam Blade to form the Nebulasteam Rifle (ネビュラスチームライフル, Nebyura Suchīmu Raifuru).

The Nebulasteam Gun is a creation of Kaisei Mogami, based on experiments mixing Nebula Gas with the Bugster Virus. It is the core of the Kaiser System (カイザーシステム, Kaizā Shisutemu). Takumi Katsuragi, who at the time was Mogami's supervisor, would later create a simplified and weaker version of the device called the Transteam Gun. Nariaki Utsumi would eventually update the Kaiser system for the use of Namba Heavy Industries Ltd.

Design

The Nebulasteam Gun is composed of the following parts:

• Gear Bottle Slot (ギアボトルスロット, Gia Botoru Surotto): The slot of the Nebulasteam Gun, it takes in a Fullbottle for transformation or an attack. It has a function which activates the Transgel Solid inside of the Fullbottle via a special pulse, allowing the Nebulasteam Gun to suck up the Fullbottle's essence.
• Blazing Steamer (ブレイジングスチーマー, Bureijingu Suchīmā): The muzzle of the Nebulasteam Gun, it can shoot out bullets wrapped in hot steam called Steam Burettes (スチームビュレット, Suchīmu Byuretto) (On a side note, a Burette is a lab equipment used in chemistry to measure the volume of a liquid or gas. It consists of a glass tube with a stopcock at one end). Additionally, it also shoots out Transgel Steam (トランジェルスチーム, Toranjeru Suchīmu), which is used for transformation.
• Mystic Charger (ミスティックチャージャー, Misutikku Chājā): The golden panel on the Nebulasteam Gun with turquoise gears on it. It is a steam generation unit which is directly mounted onto the gun. It heats up the inserted Fullbottle/Gear Bottle's Transgel Solid (essence) and turns it into Transgel Steam, allowing transformation. In addition, Nebula Gas is also stored inside of its inner tank.
• Funky Trigger (ファンキートリガー, Fankī Torigā): The trigger used to transform or shoot. Pulling the trigger activates the Nebulasteam Gun's internal units to allow transformation, shooting or special deathblows.
• Power Hit Grip (パワーヒットグリップ, Pawā Hitto Gurippu): The hilt of the Nebulasteam Gun. Because it is composed of materials that can withstand impacts, it can be used as an impromptu striking weapon. Additionally, a computer unit inside it uses combat data to figure out the user's combat style and adjusts shooting behavior accordingly.

Users (chronological order)

User	Kamen Rider/Kaiser	Episode Obtained	Description
Kaisei Mogami	Kaiser	Kamen Rider Heisei Generations Final: Build & Ex-Aid with Legend Riders (Pre-series)	Creator of the original Nebulasteam Gun. It was destroyed alongside its user by Kamen Rider Ex-Aid and Kamen Rider Build.
Kaisei Mogami (World of Ex-Aid)	Kaiser Reverse	Kamen Rider Heisei Generations Final: Build & Ex-Aid with Legend Riders (Pre-series)	Presumably given a Nebulasteam Gun by his World of Build counterpart. It was destroyed alongside its user by Kamen Rider Ex-Aid and Kamen Rider Build.
Nariaki Utsumi	Hell Bro's/Kamen Rider MadRogue	Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~: Next Chapter	Using Kaisei Mogami's research, Utsumi created his own Nebulasteam Gun and began revising the Kaiser system. After recovering the Nebulasteam Gun from Nebula Hell Bro's, Utsumi completed his new Kaiser system and tested it, transforming into Hell Bro's. This Nebulasteam Gun would later be given to the Clone Hell Bro's before being returned to Utsumi. Utsumi would later use his Nebulasteam Gun as his personal weapon after becoming Kamen Rider MadRogue.
Unnamed man	Nebula Hell Bro's	Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~: First Chapter	This unnamed test subject was given the Nebulasteam Gun after being transformed into Nebula Hell Bro's, an incomplete form of the Kaiser system After being defeated and his transformation cancelled, Sento took him to safety, leaving the Nebulasteam Gun on the ground. Nariaki Utsumi recovered it and used the data to complete the Kaiser System.
Fu Washio	Remocon Bro's/Hell Bro's	The Phantom of the West (presumably)	Shared with his brother as his transformation device and personal weapon in both Remocon Bro's and Hell Bro's forms.
Rai Washio	Engine Bro's	The Phantom of the West (presumably)	Shared with his brother as his transformation device and personal weapon. The gun later disintegrated alongside its user by Evolto.
Gentoku Himuro	Kamen Rider Rogue	ROGUE	After becoming a Kamen Rider of Seito/Namba Heavy Industries Ltd., Gentoku uses a Nebulasteam Gun as his personal weapon after his Transteam Gun was taken.
Clone Hell Bro's	Clone Hell Bro's	Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~: Final Chapter	A Nebulasteam Gun was given to this clone of Hell Bro's so Utsumi could collect data on its fight with Build.
Evolto/Ryuga Banjo	Kamen Rider Evol	Tower of Destruction	Borrowed briefly from Gentoku Himuro to use it against him and Kazumi Sawatari.
Kazumi Sawatari	Kamen Rider Grease	The Unstoppable Genius	Borrowed briefly from Gentoku to allow him, Ryuga Banjo, and Takumi Katsuragi to escape from Evolto and MadRogue.

Functionality

Transformation

The Fullbottle-like Gears are loaded into the Nebulasteam Gun and the trigger is pulled to transform into a Kaiser(similar to loading a magazine). To transform into the Hell Bro's, the Gear Engine or Gear Remocon is inserted before being removed to insert the other and pull the trigger. The transformation commands for Mogami's Kaiser System are "Kaiser" (カイザー, Kaizā) and "Bikaiser" (バイカイザー, Baikaizā). The transformation command for Utsumi's Kaiser System is "Jundou" (潤動, "Jundou" lit. Lubricate).

Finishers

The Nebulasteam Gun has four finishers: Funky Drive (ファンキードライブ, Fankī Doraibu) with any Gear as a Kaiser, Funky Finish (ファンキーフィニッシュ, Fankī Finisshu) with any Gear as Hell Bro's, Funky Break (ファンキーブレイク, Fankī Bureiku) with the Crocodile Crack Fullbottle, and Funky Attack (ファンキーアタック, Fankī Atakku) with any other Fullbottle.

While in Rifle Mode, its finisher is the Funky Shot (ファンキーショット, Fankī Shotto).

• Funky Drive
• Funky Break
• Funky Attack
• Funky Shot

• Kaisers
• Bro's

• Gear Engine: Kaiser Reverse fires a large blast of red energy surrounded by several energy gears, then performs a roundhouse kick that leaves behind a trail of red energy.
• Gear Remocon: Kaiser fires a blast of blue energy surrounded by several energy gears at the enemy.

Funky Drive (Gear Engine) (Kaiser Reverse) (Part 1: Charged Shot)

Funky Drive (Gear Engine) (Kaiser Reverse) (Part 2: Roundhouse Kick)

Funky Drive (Gear Remocon) (Kaiser)

• Gear Remocon: This finisher has two variations:
  • Remocon Bro's produces a large cyan energy gear from his hand, which fires fires a smaller cyan energy gear at the enemy. This attack can be combined with a silver gear-like energy slash from the Steam Blade of Engine Bro's.
  • Clone Hell Bro's disappears before reappearing behind the enemy and firing cyan and white energy gears.

Funky Drive (Gear Remocon) (Remocon Bro's) (Step 1: Cyan energy gear creation)

Funky Drive (Gear Remocon) (Remocon Bro's) (Step 2: Gear enlarging)

Funky Drive (Gear Remocon) (Remocon Bro's) (Step 3: Firing secondary energy gear)

Funky Drive (Gear Remocon) (Remocon Bro's) (Step 4: Striking enemy)

Funky Drive (Gear Remocon) (Remocon Bro's) (Step 5: Explosion)

Funky Drive (Gear Remocon) (Hell Bro's) (Step 1: Disappearing)

Funky Drive (Gear Remocon) (Hell Bro's) (Step 2: Reappearing)

Funky Drive (Gear Remocon) (Hell Bro's) (Step 3: Energy gears)

Funky Drive (Gear Remocon) (Hell Bro's) (Step 4: Impact)

Funky Break (ファンキーブレイク, Fankī Bureiku): Rogue charges the Nebulasteam Gun with purple electricity while purple energy constructs of broken debris surrounds it and converges in front of the barrel. He fires a construct of Cruncher Fang in a purple explosion, with the Cruncher Fang ramming the enemy into the environment.

Funky Break (Step 1: Charging)

Funky Break (Step 2: Debris constructs converging)

Funky Break (Step 3: Firing)

• Biotic Fullbottle
• Lost Fullbottle

• Phoenix: Rogue transforms into a phoenix made of fire, giving him temporary flight abilities. He can also bring other people with him.

Funky Attack (Phoenix)

• Cobra Fullbottle: Clone Hell Bro's fires an energy construct of cobra followed by cyan, white, and blue energy gears. The cobra first attacks the enemy by itself before it and the gears attack together.

Funky Attack (Cobra) (Step 1: Charging)

Funky Attack (Cobra) (Step 2: Cobra construct)

Funky Attack (Cobra) (Step 3: Cobra construct attacking enemy)

Funky Attack (Cobra) (Step 4: Energy gears)

Funky Attack (Cobra) (Step 5: Gears and cobra attacking)

• Gears
• Crocodile Crack
• Lost Fullbottle
• Biotic Fullbottle

• Gear Engine: Engine Bro's fires a silver engine-like energy drill orange energy construct surrounded by orange energy and swirling blue energy.
  • Elek Steam: A ball blue and orange energy in front of the Nebulasteam Rifle's barrel before forming a silver engine-like energy drill that Remocon Bro's fires at the enemy.

Funky Shot (Gear Engine) (Step 1: Forming engine-like projectile)

Funky Shot (Gear Engine) (Step 2: Firing)

Funky Shot (Gear Engine) (Step 3: Impact)

Funky Shot (Gear Engine) (Step 4: Explosion)

Funky Shot (Gear Engine) (Elek Steam) (Step 1: Blue and orange energy ball)

Funky Shot (Gear Engine) (Elek Steam) (Step 2: Engine-like projectile)

Funky Shot (Gear Engine) (Elek Steam) (Step 3: Firing)

Funky Shot (Gear Engine) (Elek Steam) (Step 4: Impact)

Funky Shot (Gear Engine) (Elek Steam) (Step 5: Explosion)

• Crocodile Crack: Rogue fires a purple energy construct of the Cruncher Fang that bites down on multiple enemies.

Funky Shot (Crocodile Crack) (Step 1: Cruncher Fang construct)

Funky Shot (Crocodile Crack) (Step 2: Biting enemies)

Funky Shot (Crocodile Crack) (Step 3: Explosion)

• Bat: Remocon Bro's fires a blast of purple and yellow energy that leaves behind purple sonar-like waves.

Funky Shot (Bat) (Step 1: Charging)

Funky Shot (Bat) (Step 2: Firing)

Funky Shot (Bat) (Step 3: Energy blast approaching target)

Funky Shot (Bat) (Step 4: Impact)

• Phoenix: Rogue fires a blast of fire at the enemy.

Funky Shot (Phoenix)

Behind the Scenes

Portrayal

The Nebulasteam Gun is voiced by KORBY, who also voiced the Build Driver.

Notes

• The Kuroko (駆鱗, Kuroko) part of the Nebulasteam Gun's full name is formed by combining the pronunciations of 駆(Ku) and 鱗(Uroko).
  • It also a pun on the word Crocodile, referencing the weapon's user, Kamen Rider Rogue.
• Nebulasteam Gun will announce "Lost Match" upon utilizing certain Fullbottles, likely to communicate that these Fullbottles have no Best Matches for them.
  • Most of these Fullbottles are later revealed to be connected to the Lost Fullbottles under Evolto's possession.
• Due to sharing its pin combination, the Engine Fullbottle will be read as the Gear Engine if inserted on the DX Nebulasteam Gun..
• The two Gears form Best Matches with the two Fullbottles used by Gentoku Himuro, Bat and Crocodile.
• Unlike the Transteam Gun which has both full-size & smaller prop in the show, Nebulasteam Gun only has full-size one. DX version, however, is still smaller like DX Transteam Gun.

Appearances

• Kamen Rider Build
  • Kamen Rider Heisei Generations Final: Build & Ex-Aid with Legend Riders
  • Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~
    • Next Chapter
    • Final Chapter
  • Episode 23: The Phantom of the West
  • Episode 24: A Man Called Rogue
  • Episode 25: The Idol Awakens
  • Episode 26: The Treacherous Deathmatch
  • Episode 27: The Counterattack Hero
  • Episode 29: The Opening Bell Rings
  • Episode 30: The Truth of the Pandora Box
  • Episode 31: Surging Magma!
  • Episode 32: Programmed Tragedy
  • Episode 33: The Final Weapon: Evol
  • Episode 35: Tower of Destruction
  • Episode 37: The Ultimate Phase
  • Episode 38: Mad World
  • Episode 39: The Unstoppable Genius
  • Episode 40: The Final Revolution
  • Episode 42: Legacy of Doubt
  • Episode 44: The End of Evolto
  • Episode 45: The Scientist of Hope
  • Episode 47: Zero Degree Flames
  • Kamen Rider Build: Final Stage
  • Build NEW WORLD: Kamen Rider Cross-Z

See also

• Transteam Gun
• Nebula Gas
• Bugster Virus

External links

• Kamen Rider Zukan page on the Nebulasteam Gun.