Synopsis

Tsukasa found himself clad in unfamiliar garments, a peculiar card in hand, as he and Natsumi, along with Yusuke, were suddenly beset by the Strange Demon Robot Schwarian and his followers. Kamen Rider Black RX engaged them in battle, both sides mistakenly identifying Tsukasa as Joe the Haze. The sudden appearance of the Seamoon Fangire and Scorpion Imagin prompted Tsukasa to transform into Decade, lending Agito's power to aid RX against the monsters, while Schwarian retreated. After Natsumi int