シャドームーン
is a supreme commander of the Crisis Empire from the World of Black RX. He is killed by Diend. Jark reappears in "Super Hero Taisen" as part of the new Dai-Shocker assembled by Tsukasa. After Dai-Shocker's alliance with Dai-Zangyack is revealed, Jark is once again defeated along Shadow Moon by the combined forces of Kamen Rider Black and the Maskmen.