- The panel shows Cure Black with her midriff outfit which she wore in the first season. It would have happened during the first season.
- Their trainer is Evangeline, who forced her to use that outfit.
In the distant past, Dark Fall made an attempt to capture the seven fountains. A pair of women named Nagisa and Honoka, aided by the spirits Mepple and Mipple, fought them off and won, but didn't quite manage to wipe out the bad guys. (Possibly, they never realized Goyan was the real Big Bad.) Their story was known in part by the Muggles and, through repetition, it lost details (such as Uzainas being produced from different things depending on who creates them), and some things got mixed up.
Fast forward to the modern day, where some Toei exec decides that a modernized version of the old Pretty Cure "myth" would make a great anime. Nagisa and Honoka were recast as schoolgirls, with the added "complete opposites" angle, and new names were made up for everything whose real name was forgotten. The Hikari angle was probably invented as an excuse to extend the show for another year as Max Heart. (Alternatively, perhaps instead of the Queen being restored to her original form, the real Hikari regained the Queen's power and memories in her current body, becoming the Filia we know.)
Since both the legend and the TV show are well known, Flappy assumes Saki and Mai will instantly understand how this Pretty Cure thing works. This is why he's so uninformative about it at first and irritated when they need things explained to them.
- The fanfic version, Futari wa Hearty Pure, is confirmed to be based on such a legend, only this time with the two women being renamed Nadeshi and Hanako like in the series, in an early episode of Pretty Cure Heavy Metal.
- Is Atomic Betty is also a Kamen Rider? (Yoko Honna voiced Atomic Betty in Japan.)
- In Heartcatch, Tsubomi's mother's maiden name was Kaoruko Godai. Within a couple of days of that fact being revealed, this piece of fanart◊ appeared.