The Cast Showoff: Candelilla is played by an idol, so naturally they come up with excuses to have her sing.
Fan Nickname: Before Deathryuger's name was officially announced, folks had taken to calling him Kyoryu Navy.
In the V-Cinema film 100 Years After, Tobaspino actually has a new (not evil) partner, actually called Kyoryu Navy.
"Daigo Sentai Kingranger/Kiryuger", used in cynical criticism of the heavy focus on Daigo. Though as it's far from the first series to Focus Heavily on a Red Ranger (Shinkenger and Gobusters, anyone?), Daigo's Focus is only seen in the storyarc and he doesn't take the spotlight in other character's episodes, and the series after Kyoryuger would shove their Reds even more into the foreground so they're a nuisance shoving their coworkers out of frame in nearly every episode, the creation of this slanderous nickname has not only become more baffling, but unjustified a criticism.
Voltasaurs, which originates from the Overtime fansub (famous for performing full-on Dub-styled adaptations in their translations Ala 4Kids entertainment/4KMedia's practices rather than the more common and preferred methods of providing a proper translation or leaving proper nouns that don't translate correctly as they are), for the Zyudenryu. Zyudenryu means Beast Electric Dragon (or Electrobeast Dragon or Electrobeast Dinosaur, Japan has also been known to shorted their word for Dinosaur, "kyoryu" to just "Ryu" as times when it's amalgamated with another word), while Voltasaur means Electric Lizard.
As for Utsusemimaru, some fans would affectionately call him UtsusemiMoe for being Adorkable.
And speaking of Kamen Rider, we have a girl named Yayoi who wears glasses in a Riku Sanjo work. Are we talking about Yayoi Ulshade, the granddaughter of Kyoryu Violet? Or is her name Yayoi Tokuda, the Coma Zodiarts?
Amy, Luckyuro and Torin are all fans of the in-series manga Love be Ball Touchdown (Love Touch, for short). Luckyuro's love of the manga causes her to even have a morality crisis as pointed out by Amy, since if the Earth's destroyed, she won't get any new volumes.
Because of The Smurfette Principle, having the Yellow ranger male had been considered for this series.
The head writer RikuSanjo originally wanted Blue to be a 45-year-old family man. The idea was vetoed, but some elements of it seem to have been used nonetheless in a downplayed form (he's still the oldest on the team at 32, and acts as a surrogate husband and father to his sister and niece respectively), and it was even given a reference in Episode 8 when KyoruyBlue's "old man jokes" cause Yuko to speculate on his age:
Yuko: He might be a hero, but he's got to be at least 40!
Nobu: No way Blue is already 40 years old! He's definitely younger than that. ...I think.