Genome Combiner

The Genome Combiner is the transformation device used by both Power Rider DNA and Power Rider Draco. As the Rider System (ライダーシステム) created by Shinobu Katsuragi and finished by his son Takumi Katsuragi, it uses Fullbottles as its primary collectible device. Sento later made another Build Driver for Ryuga to use to become Cross-Z after the first time he used Sento's Driver.

According to Seth Keegan, one must have a Hazard Level of 3 to be able to transform using the Genome Combiner. Otherwise, they'll get electrified and rendered unconscious by the anti-theft system on the belt.

As stated by Seth and later seen in the flashback of his first battle, the Genome Combiner didn't originally announce Base Pairs until he'd modified it to do so.

The Genome Combiner is later revealed to be a safer and weaker version of the Revolve Combiner, due to Takumi Katsuragi being aware that the Revolve Combiner could not be used by normal humans using conventional means.

Design
The Genome Combiner is composed of the following parts:
 * Vortex Charger (ボルテックチャージャー) - The circular energy generator unit. By turning the Vortex Lever, the Vortex Charger spins, activating the internal Nitro Dynamo (ニトロダイナモ) engine, generating enough energy to transform and deal deathblows.
 * Vortex Lever (ボルテックレバー) - The crank used to activate and operate the Genome Combiner. The faster the crank is spun, the more energy is developed.
 * Twin Base Tank Slots - The slots that Base Tanks are inserted into. It takes in the Transgel Solid ingredients inside of the Base Tanks and feed it to the Building Modules.
 * Building Modules (ビルディングモジュール) - An expansion device built into the Twin Base Tank Slots. During transformation, it develops the Snap Ride Builder (スナップライドビルダー) (or any other type of 'Builders'), a compression device resembling plastic model runners, allowing transformation to occur.
 * Safety Guard Case (セーフティガードケース) - The outer parts. It utilises high-strength material with heat and impact resistance, allowing it to protect internal mechanisms. It is so strong that it can withstand Wrecker attacks.
 * Adjust Bind (アジャストバインド) - The yellow strap used to fix the Genome Combiner upon the waist. When the Combiner is not in use, it is stored inside the Combiner.
 * Qualifizer (クオリファイザー) - A biometric scanning device located in the black section at the rear of the Adjust Bind. It reads Hazard Levels, and will prevent transformation to anyone lower that a Hazard Level 3.
 * L&P Amplifier (L＆Pアンプリファー) - A converter installed inside the Driver that converts emotions into energy. The stronger the emotions, the stronger the Rider's attacks will be. This is due to their Hazard Level increasing/decreasing depending on emotions.

Transformation
Power Rider DNA transforms by inserting two Fullbottles into the Build Driver's Building Modules (ビルディングモジュール) and plugging them into the Twin Fullbottle Slots (ツインフルボトルスロット). The user then turns the Vortex Lever (ボルテックレバー), a crank that generates power to the Vortex Charge (ボルテックチャージャー) energy core generator unit by turning the lever. This gives the Nitro Dynamo (ニトロダイナモ) inside the Vortex Charge the momentum it needs to generate power for transformation and finishers. Larger amounts of energy can be generated by increasing the momentum of turning the Vortex Lever and rotation speed of the Vortex Charge.

In a rare instance for Rider Belts, in Episode 1, the inner workings of the Genome Combiner were seen during transformation. As the Vortex Lever and Vortex Charge turns, it moves the gears and pistons inside the belt which pump essence from the Base Tanks out of their containers through pneumatic tubes, which move out of the belt and form the base for assembly of the suit. If the user is transforming into a Base Pair form, the Combiner then initializes the Snap Ride Builder (スナップライドビルダー) after the essences have hardened into the Helixes. Afterwards, the Driver will yell out "Are you ready?" (「あーゆーれでぃ」). To confirm and initiate transformation, one must give the voice command of "Helix phase, activate!", "Build Up!" (「ビルドアップ」) or "I'm ready" (「できてるよ」) (humorously, the Genome Combiner will also respond to replies of "No I'm not!" (「ダメです」)). Once the confirmation voice command has been given, the Snap Ride Builder will collapse onto the user, snapping the two parts together and completing the transformation. The Snap Ride Builder will not appear if the user is moving during the transformation, while in some instances, the pneumatic tubes of the Snap Rider Builder will simply appear in a quick flash so as to speed up the transformation.

The Build Driver is layered in an alloy called the Safety Guard Case (セーフティガードケース), designed to resist high temperatures, high impacts of force and attacks by the Smash. As a security feature, the belt uses the Qualifizer (クオリファイザー) fastener to do a biometric scan of its wearer to determine if the intended user has a minimum Hazard Level of 3. If it is not, the belt will not function and go into a protective shutdown state, punishing the would be wearer. If the user does, the belt will continue to operate normally.

An ideal combination of two matching Fullbottles will create a Best Match (ベストマッチ) form, but any other imperfect combination is known as a Trial Form (トライアルフォーム). The Build Driver did not originally announce Best Matches, but was later modified to do so by Sento Kiryu.

Kamen Rider Cross-Z transforms by inserting the Dragon Fullbottle into the Cross-Z Dragon, before inserting it into the Build Driver, and turning the crank.

When transforming into Cross-Z Magma by inserting the Dragon Magma Fullbottle into the Cross-Z Magma Knuckle before inserting it into the Build Driver and turning the crank, the Magma Ride Builder (マグマライドビルダー) is summoned and pours Variable Magma over the Rider. This substance forms a casting of the Cross-Z Magma armor as numerous smoldering dragons rise up from the pool of lava. Once cooled and hardened, the Magma Ride Builder shatters the cast, releasing Cross-Z Magma.

The transformation into Grease Blizzard is mostly the same, with the North Blizzard Fullbottle being inserted into the Grease Blizzard Knuckle, the weapon inserted into the Driver, and, after turning the crank, summoning the Ice Ride Builder (アイスライドビルダー Aisu Raido Birudā) to submerge the Rider in liquid Variable Ice. The substance hardens into a mound of ice, before the Ice Ride Builder shatters the construct to reveal Grease Blizzard.

Finishers
While transformed, Build/Cross-Z/Grease initiates a finishing move by turning the Vortex Lever. Build's Best Matches use the Vortex Finish (ボルテックフィニッシュ), and Build's Trial Forms use the Vortex Attack (ボルテックアタック). Cross-Z' finisher is the Dragonic Finish (ドラゴニックフィニッシュ), later followed by Cross-Z Magma's Volcanic Attack (ボルケニックアタック Borukenikku Atakku) and Volcanic Finish (ボルケニックフィニッシュ Borukenikku Finisshu). Grease's brief use of the Grease Blizzard Knuckle as Grease Blizzard had used finishers known as Glacial Attack (グレイシャルアタック Gureisharu Atakku) and Glacial Finish (グレイシャルフィニッシュ Gureisharu Finisshu).

Snap Ride Builders
Transformation Setups=

Portrayal
The voice of the Build Driver was provided by KORBY.