History Series / KamenRiderRyuki

* ''Film/KamenRiderRyukiEpisodeFinal'' (2002), a movie set in an AlternateTimelines to the main series.

** Shinji and Ren have Rider #1 and Rider #2's poses, respectively.

* InSpiteOfANail: [[spoiler:Shinji when trying to change the past after Odin used his Time Vent, nothing he does manages to have an effect. The closest he came was warning Kitoako that Asakura would become a Rider and break out of jail. Kitoaka believed him, but decided against preventing Asakura from becoming a Rider because there had to 13 Riders in the battle the winner to get the prize.]]

* BondCreatures: Each Rider must make a contract with a Mirror Monster of their own to become powerful enough to fight. After the deal is struck, the Rider's contract monster is a loyal servant and freely grants their power, but only remains that way so long as the Rider can uphold their end of the deal and provide them with the essence of other slain Mirror Monsters (or, as some particularly ruthless Riders found, live humans) to feed on. If the Rider for any reason fails to provide them with food regularly, or their Advent Deck is ever destroyed, the contract is broken and monster will turn on their former master and devour them instead. Kamen Rider Scissors learned that the hard way. A Rider can potentially steal another Rider's Contract Monster if they kill the current user and take their contract card, but this isn't advised. The monster retains its loyalty to its original master and will turn on the the one who stole them unless the new user as soon as they are able. A strong enough Rider can overwhelm their new monsters and beat them into obedience, but the same rules still applies and the Rider will have to protect all of their contract cards and provide enough food to sate all their monsters or the stolen ones and their original contract monster will turn on and devour them.

* BondCreatures: Each Rider must make a contract with a Mirror Monster of their own to become powerful enough to fight. After the deal is struck, the Rider's contract monster is a loyal servant and freely grants their power, but only remains that way so long as the Rider can uphold their end of the deal and provide them with the essence of other slain Mirror Monsters (humans are a decent substitute for particularly ruthless Riders)to feed on. If the Rider for any reason fails to provide them with food regularly, or their Advent Deck is ever destroyed, the contract is broken and monster will turn on their former master and devour them instead. Kamen Rider Scissors learned that the hard way.

** In one episode, ''[[Anime/CombattlerV Combattler V]]'' can very briefly be seen playing on a TV.

[[OnceOriginalNowCommon While perhaps not the most popular]] ''Kamen Rider'' series of the Heisei era, ''Ryuki'' was one of the most influential - its morally grey conflicts, [[EvilHero evil Kamen Riders]] and [[ClothesMakeTheSuperman equipment-based transformations]] would leave permanent marks on the franchise, and at the same time it would [[GenrePopularizer spark a boom]] in DeadlyGame and ThereCanOnlyBeOne storylines in broader Japanese media. Similarly the storyline of ''Anime/PuellaMagiMadokaMagica'', regarded as a GenreTurningPoint for MagicalGirl media, was modelled heavily on ''Ryuki'' at the writer's own admission (which years later would lead to him being recruited to write ''Series/KamenRiderGaim'').

* ''Kamen Rider Ryuki: Ryuki vs. Series/KamenRiderAgito'' (2002) is a DVD episode that was distributed by ''Televi-kun'' magazine where ''Ryuki'' crosses over with the preceding season (though it's AllJustADream of Shinji's).

** Ouja also makes a guest appearance in ''Geats''[='=] own ''Televi-kun'' DVD episode, ''Kamen Rider Geats: What the hell?! Desire Grand Prix Full of Men! I'm Ouja!'' (2023); which features a battle at the climax where some of Geats' Riders borrow the powers of Ryuki and Ouja.