Kamen Rider Ryuki

College student and motorcycle enthusiast Takeshi Hongo is abducted by the evil organization Sustainable Happiness Organization with Computational Knowledge Embedded Remodeling, otherwise known as "Shocker", and converted into Batta Augment-01 as part of their plans for world domination. Before they can brainwash him to do their bidding, he escapes and uses his new enhanced abilities, renaming himself Kamen Rider, to wage a one-man war against Shocker.

"Tradition. History. Pride. Struggle. Reflection. Courage. Beyond that, there is innovation. Don't lose your dream.

Wake up."

In a world shaped by the dreams we see in our sleep, ZEZTZ enters people’s dreams as an agent on a mission. Equipped with a cutting-edge Rider belt worn across the chest, ZEZTZ brings a bold new form to the battle.

Both Kamen Rider Ryuki and Ex-Aid have several Riders fighting each other through competition and betrayal while facing monsters in their respective stories (Mirror Monsters / Bugsters). Both also have a secondary Rider with a knight motif.