Titan Undead, or better known as the Titan Undead is an artificial Undead created from the Scorpion Undead (right-half) and Chameleon Undead (left) being fused by Hiroshi Tennoji into one monster that had access to their attributes and two buckles on its belt. Tennoji unleashed the monster for endgame, using Scorpion's Undead Venom and Chameleon's cloaking/disguise abilities to turn the Riders against each other. By acting that he fell under the power of Joker, Hajime Aikawa and the other Riders tricked Titan to reveal itself, defeating Titan by Blade King Form's Four Card with Garren and Leangle splitting Titan back into two sealed Undead.
Movie War 2010
Titan Undead was part of the group Super Shocker led by Colonel Zol who witnessed the revival of the Super Crisis Fortress. When a newly revived Tsukasa, Natsumi, Yusuke, and Kaito arrives, he fought Kamen Rider Decade until Kamen Rider Diend finishes him with his Final Attack Ride in an exchange finisher.