Dragblacker

Dark Dragon Dragblacker is a mechanical black Japanese Dragon monster that's Kamen Rider Ryuga's Contract Monster. It is a dark version of Ryuki's Dragreder.

Partnered with Ryuga, they first attacked Ouja's monster, saving Femme and killed Genocider before Femme killed Ouja. Dragblacker later assist his master in his combat against Femme and Knight before Ryuki joined the battle and killed him with Ryuga via a standard Dragon Rider Kick.

Dragblacker here is a corrupted Dragreder after Ryuki was possessed by his late brother and tainted into Ryuga.

After Shinji abandoned his current Advent Deck for Ryuga's, he is driven into madness by this power, followed by the transformation into Ryuga Survive. While Dragblacker didn't appear, but if Ryuga did evolved, Dragblacker might as well received the same effect, presumably transforming into a replica of Dragranzer.

In the World of Faiz, after Daiki took Tsukasa's Ride Booker, Narutaki took advantage of the situation as he took Tsukasa into another dimension to be killed by Kamen Rider Ryuga. However, after interrogating Kiva-la on the whereabouts, Daiki intervenes while claiming it was to get the Faiz Gear as he gives Tsukasa back the Ride Booker.

In his fight with Ryuga, Diend summoned Kamen Rider Kiva ("A monster for a monster.") when Ryuga summoned Dragblacker, transforming him into his Final Form Ride Kiva Arrow form soon after. He used Kiva Arrow's Final Attack Ride to counter Ryuga's Final Vent. Diend's final attack prevailed, seemingly destroying both Ryuga and Dragblacker.

The alternate Dark Rider Ryuga from the World of Negatives was also able to summon a Dragblacker, which he did while fighting Decade after he acquired the K-Touch and assumed Complete Form. Decade summoned Final Kamen Ride Ryuki Survive as Ryuga prepared his Final Vent with Dragblacker, with Decade's final attack prevailing and destroying them both.

Dragblacker was among the Contract Monsters that fought Kamen Rider Decade along with their contract holders in the Rider War. He, along with Dragreder, attacked Decade head on, and were shot down before they could even reach him.

Dragblacker was among one of many Mirror Monsters brought over to Sougo Tokiwa's world as the Rider Worlds began to merge.

Dragblacker was destroyed along with several other monsters by Kamen Rider Oma Zi-O.

Trivia

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