Clone Hell Bro's

Clone Hell Bro's (クローンヘルブロス) is a creation of Nariaki Utsumi in his research regarding possibilities of creating the Clone Smashes.

Short Life
He was created by Nariaki Utsumi and battled various Kamen Rider holograms, including Build RabbitTank Sparlking, Cross-Z Charge and Build Hazard. Being a clone himself, Clone Hell Bros don't have human emotions and don't feel any pain. Utsumi, unsure is his creation were ready to face of real Kamen Riders and not their holograms, decided to use Clone as a foe for Kamen Rider Build SameBike Form. Eventually, this Clone were defeated by Sento Kiryu.

Legacy
Data obtained from his battles with both holograms and real Kamen Riders were used by Utsumi to create Clone Smashes.

Forms
 Hell Bro's Statistics Ability Perimeters: Hell Bro's (ヘルブロス) is the fusion of Engine Bro's and Remocon Bro's, transformed into by inserting the Gear Engine or Gear Remocon into the Nebulasteam Gun, then removing it and inserting the other gear before pulling the trigger.
 * Height: 202.0 cm
 * Weight: 108.0 kg
 * Punching Power: 41.6 tons
 * Kicking Power: 50.6 tons
 * Maximum Jump Height: 64.8 m
 * Maximum Running Speed: 100 m. per 1.4 sec.

As Hell Bro's is a fusion of both Kaisers, Hell Bro's stats are higher than even Kamen Rider Rogue, with speed being similar to Build's Hazard Forms and average jumping power.

Hell Bro's has 3 different finishers:
 * Nebulasteam Gun finisher:
 * Funky Finish (ファンキーフィニッシュ): Hell Bro's channels the power of a Gear and performs a powerful blast attack.
 * Gear Engine:
 * Gear Remocon:
 * Funky Attack (ファンキーアタック) Hell channels the powers of a Fullbottle and performs a powerful blast attack.
 * Nebulasteam Rifle finisher:
 * Funky Shot (ファンキーショット): Hell channels the power of a Gear or Fullbottle and performs a powerful blast attack.
 * Gear Engine:
 * Gear Remocon:

Appearances: ''Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~: Final Chapter

Devices

 * Nebulasteam Gun - Personal weapon.

Appearances

 * Icon-build.png Kamen Rider Build
 * Kamen Rider Build: Raising the Hazard Level ~7 Best Matches~: Final Chapter