"Kamen Rider Ryuki" is a Japanese tokusatsu television series that aired from 2002 to 2003. It is part of the long-running Kamen Rider franchise and features a unique storyline centered around a battle royale among Kamen Riders. Each Rider fights using special cards called Advent Cards to summon monsters and gain powers, with the ultimate goal of defeating the others to claim a wish. The main character, Shinji Kido, transforms into Kamen Rider Ryuki to uncover the truth behind the battles and the mysterious Mirror World. The series explores themes of desire, conflict, and the consequences of one's choices, making it a notable entry in the Kamen Rider series.