Swartz's Army

Swartz's Army is an army of past enemies of the Kamen Riders assembled by the Time Jacker Swartz to assist him in his goal of merging the worlds together and major antagonists in the final arc of Kamen Rider Zi-O.

History
As Swartz's plans reached their final stages, the Skywall from the World of Build arose in Zi-O's timeline and from it past enemies of the Kamen Riders such as the Guardians and Roidmudes emerged to cause havoc. Soon after, the Futo City Tower and Yggdrasill Tower emerged as more enemies such as the Masquerade Dopants and Inves appeared, along with Mashin Chaser who, due to the shifting of the timelines, did not remember being Kamen Rider Protodrive and instead sought to destroy the Kamen Riders until Geiz reminded him of Gou Shijima.

Members

 * Dopants
 * Masquerade Dopants
 * Zodiarts
 * Orion Zodiarts
 * Stardust Ninja Dustards
 * Inves
 * Shika Inves
 * Elementary Inves
 * Roidmudes
 * Mashin Chaser
 * Smash
 * Strong Smash Hazard
 * Guardians