Kamen Rider Ryuki

Both Kamen Rider Agito and Ryuki share similarities in the dark tone and the mystery that surround the plot of the series.

Both shows are a battle royal of good and evil Kamen Rider that are fighting to win a wish/fruit

Both shows have over 10 riders (if you include the ryuki movies).

Both shows have a dimension from where the power originates

The rider suits all have motifs of warriors, which include knights and many others.

Both shows have about 10 riders. These riders fight each other and also work together, depending on the situation.

Both shows have a dimension besides the one where the riders live in

The riders of Saber are swordsmen/knights. The rider suits of Ryuki all have motifs of warriors, which include knights and many others.

Main rider of Saber has a dragon motif and many other riders have animal motifs as well. Main rider of Ryuki has a dragon motif and all the other riders have animal motifs. Both shows have a dark dragon motifed villain that fights the main rider.

Set between Kamen Rider W episodes 44 and 45, the film focuses on the invasion of Futo by the Special Mercenary Force "NEVER" led by a man named Katsumi Daido.

The universe is not just one. Within the overlapping layers of the multiverse, there exists another Earth that looks exactly like Earth. In "MultiEarth ?0073", which has entered an era of cosmic coexistence, crimes involving the exploitation of energy-based lifeforms known as "Emorgy" are breaking out one after another. Reiji Doki, an investigator for the Galaxy Federal Police, is Gavan Infinity, the only person in the universe permitted to claim the title of "Space Sheriff Gavan". However, he is stationed in the backwater Archives Department. His true objective is to investigate Emorgy crimes across dimensions. Chasing these inter-dimensional threats, Reiji leaps through space-time, encountering the Gavans of various dimensions and joining forces to bring justice to the multiverse. "Jo-Chaku!" The Space Sheriffs Gavan transcend the boundaries of the universe to strike down evil!

(Kamen Rider Kuuga) Theme is Dark, it shows Kuuga evolving into a Rider and Ultimately didn't become what he was supposed to become and went on a journey to recover his smile. which is sad because he was such a happy go luck guy.

(Kamen Rider Ryuki)If you are looking for a Dark Drama with Mature Theme and you like to sob your little fangirl or fanboy hearts out, then this is for you my friends! I like it because it shows us all the dark side to us all with wanted to have a chance to fulfill a wish for a loved one or what have all the while you are fighting others and your inner self for the Final Wish at the end on that long and hard journey. The Finale will clearly satisfy those that truly love and stuck through the whole series! I liked it eventhough I shed some tears in the latter episodes.

Katsumi Daido/Kamen Rider Eternal stars in his own movie, Kamen Rider Eternal, as part of Kamen Rider W Returns which was released on July 21, 2011. In the film, unable to properly synch with a normal version of the Eternal Memory, Jun Kazu assumes a weaker form of Eternal called Red Flare.

This movie takes place in an alternate universe (where its storyline could be considered a prequel to the events of the TV series). In 1999, an enormous meteor crashed onto Earth carrying extra-terrestrial creatures. In order to counter this new threat, ZECT was formed. Seven years later, in the year 2006, power struggles in ZECT have caused a new group, known as Neo-ZECT. With three groups in existence (Neo-ZECT, ZECT and the Worms), Tendou has decided to sell his power to either Neo-ZECT or ZECT, but his intentions are unclear. ZECT reveal a plan to save humanity, but unknown to other is a plot to destroy man kind.

555 is the series after Ryuki so if you want to watch the Kamen Rider seasons in order then watch 555 after Ryuki.

Hidari Shotaro is a detective working in his beloved town Futo. But something is threatening the peace in the town - Gaia's memories, which turn people into monsters. Shotaro has a secret partner, and together they protect Futo.

New Ultraman, Shinji Kaminaga, a man who could transform into a building-sized hero when various creatures threatened his city.

Tokusatsu Heroes battling a survival deathmatch for a wish granted to the sole victor

Main character are both naive and friendly

Main characters motif are both dragons

You must fight if you want to survive.

Both shows focus on a group of characters given special items (a deck of cards and a VR headset, respectively) by a game master, who is prodding them to kill everyone else to receive a reward. With a lead character whose conscience is too strong to kill anyone.
Alternate worlds are present in both premises. Versus Road having VR and Ryuki having a world on the other side of the mirror, with both of them being the setting for (most of) the fights.

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.