Megahex

Megahex (メガヘックス) is the main antagonist of Kamen Rider × Kamen Rider Drive & Gaim: Movie War Full Throttle. Near the end of the second part of the movie, he absorbs Cyberoid ZZZ's body and becomes ZZZ Megahex (ZZZメガヘックス).

Character History
Megahex appeared and attacks Planet of Helheim one day and attacks Kouta, as well as kidnapping Mai. During their fight on the planet, Megahex learns of the planet Earth from reading Kouta's memories. During his travel to Earth, Kouta as Kamen Rider Gaim Kiwami Arms tries with all of his might to prevent Megahex's assimilating Earth, but the mechanical life form lands on terra firma. Gaim performs a narrow victory with a Burai Kick; however, seconds later, a second Megahex appears and beats up the weary Over Lord and kills Kouta in the air, taking the Kiwami Lockseed so that Megahex could evolve further, then his ship lands without interruption onto the ground.

Despite seeing Zawame's greatest hero fall in a fiery explosion, Takatora demanded an explanation from Megahex. Once revealing his plot, he begans assimilating a section of Zawame and any unfortunate human who was unlucky enough to stand in the zone's advancing path. He then lands in front of Mitsuzane Kureshima, triggering Megahex's hand by making the Mecha Kurokages to fight Mitsuzane, who then transforms into Kamen Rider Ryugen. Seeing as to the ease Mitsuzane scrapped the Mecha Kurokages, Megahex then makes Mecha Ryoma Sengoku to fight Mitsuzane, who succeeds in driving him off.

When Mitsuzane as Ryugen stormed Megahex's ship, he runs into Mecha Roidmudes by the dozen. After destroying a handful of them, Ryugen goes deeper into the ship to retrieve Mai despite the metallic wires that impeded his progress, and eventually does so. As he did, Megahex appears behind Takatora as Kamen Rider Zangetsu, weary from his fight with Mecha Ryoma as Kamen Rider Duke Dragon Energy Arms, and smacks the White Armored Rider to the ground, allowing Zangetsu to see Megahex assimilate the Kiwami Lockseed.

Now boosted by the seed of the Golden Fruit, Megahex attacks Zangetsu with cold savagery, even using artificial Helheim vines spawned from his body until he knocked Takatora out of his transformation, landing near Mecha Ryoma's remains, chiefly near his Genesis Driver. Despite the beatdown, Takatora refused to give up, and when Megahex tries to cut Takatora down, Mitsuzane throws to Takatora the Melon Energy Lockseed. Thinking quickly, Takatora grabbed the Genesis Driver and lifts it up so the Melon Energy Lockseed inserts and locks itself into place, then slams it on, generating the Zangetsu Shin Genetic Ride Wear to protect Takatora.

With a passionate speech, Takatora completes the transformation into Kamen Rider Zangetsu Shin, battering Megahex back. The two Riders continue their deathmatch with Megahex, with the assimilator nearly victorious until Zangetsu Shin and Ryugen use a risky maneuver to extract the Kiwami Lockseed out of Megahex's chest, with Zangetsu Shin holding the mechanical life form until Ryugen performs a Budou Sparking, giving Takatora the window needed to extract the Lockseed, uncaring if Megahex survived the attack. Furious at having the Kiwami Lockseed removed from his person, Megahex launches an attack at Takatora, Mitsuzane, and Mai, only for the three to make the Kiwami Lockseed to recreate Kouta. Once the three Riders banded together, the three Riders eventually defeated Megahex with a Triple Rider Kick, but as before, Megahex returns, as well as revealing that there are nigh-endless clones of Megahex, and these copies fly into the air.

One of these copies lands near Shinnosuke and Kiriko and notices the defeated and burned out husk of Cyberoid ZZZ's body, which was reduced to such state by Kamen Rider Drive, and assimilated with it, transforming him into ZZZ Megahex. ZZZ Megahex then leaves after talking with Shinnosuke, and flying off elsewhere, landing near the three Armored Riders as they battled a hoard of Mecha Roidmudes and Mecha Inves. ZZZ Megahex then creates Kaito Kumon to fight the Kamen Riders, who now have Kamen Rider Drive in their lineup, only for ZZZ Megahex to take a strike to the chest when the Armored Rider Baron betrays him, and manages to floor the mechanical life form.

After the Riders made a passionate speech, ZZZ Megahex spawns a small army of Mecha Roidmudes and Mecha Inves, then attacks the Kamen Riders, to which they deflected. ZZZ Megahex then charged along with his army, but when he ran off, Drive and Gaim were in hot pursuit, and raised more of his mecha army, to which was responded by the appearance of Mashin Chaser, Heart, and Brain to do battle with the army of fakes.

Cornering ZZZ Megahex, the two Riders do battle against ZZZ Megahex, eventually gaining their Type Fruits and Drive Arms forms, and also eventually destroyed ZZZ Megahex's body, with his core quickly retreating into space to bond with the planetoid-sized machine that was the source of Megahex. Drive and Gaim gave chase on Tridoron after a Shift Fruits Tire Expansion, arriving somewhere in between the Asteroid Belt and Jupiter. As the Riders arrived, some Megahex clones combined into something that resembled a Giant Bat-type Roidmude with dragonic elements and started harassing the Riders, which the Riders eventually got off their tails by blinding it with "orange juice".

As they arrived near the core, the Giant Megahex stood in front of them shooting missiles, and the walls closed in to attempt to crush Tridoron, prompting Drive to eject him and Gaim out of Tridoron, allowing them to perform a decisive Double Rider Kick to slam into the Giant Megahex towards the ground, followed closely by Tridoron slamming into it, allowing them to slam into the core, permanently destroying Megahex once and for all.

Portrayal
Megahex is voiced by Shin-ichiro Miki (三木 眞一郎), who also voiced the Genesis Driver Equipment in Kamen Rider Gaim and previously voiced the Imagin Sieg from Kamen Rider Den-O.

Its suit actor is currently unknown.

Conception
Megahex was designed by character designer Niθ.