Kamen Rider - Season 12 Episode 19 Rider Gathering
Overview: Shinji becomes trapped with Takeshi as he holds hostages in order to gain a battle with his former lawyer Shuichi. Meanwhile, in Atori, Jun invites Ren and Miyuki to participate in a game that gathers all Riders together in the Mirror World for one big battle, only to realize that the game he held has backfired on himself.