- Of the 9 Heisei-era showsnote , Ryuki made the most in terms of toy sales, earning 13.9 billion yen.
- Kamen Rider Femme from the Episode Final movie is Kamen Rider's first official female Rider in the franchise.
- Actor Allusion: Keiichi Wada plays the original Ryuki in 13 Riders. Not the first time he had a red Chinese Dragon at his command.
- Name's the Same: There is a Rider War in Decade.
- Prop Recycling: The story arc where Gai debuts involves students killing each other while wearing masks that belonged to the Mooks from Jikuu Senshi Spielban. Western viewers will recognize them as the Skugs from VR Troopers.
- What Could Have Been: 2 unused Rider forms exist: Raia Survive, and a form that (presumably) Yuichi Sato would've transformed into had he contracted with Guldthunder like Shiro intended. The unused Rider's name, coincidentally, was Blade, predating the series of the same name by around 2 years.