i think mika_enstars got to answering this here, so i'll add the translation of when he mentions it in the mini talk ♪

from the 2016 mini talk for scroll of the elements:

"Oh, Anzu! You've come at just the right time!
Anzu, there's Carranger, Ninninger, Sekai Ninja Sen Jiraiya...
And there's Henshin Ninja Arashi too; so, which one would you like to learn about!?"

-You know so much, don't you?

"Ah, no, this is actually basic knowledge...
Pretty Cure? Anzu, so you're more familiar with the magical girl shows, huh?
It's broadcasted after tokusatsu shows, so I've also seen it before."

as a bonus; not fully related to pretty cure per se, but anzu mentions magical girl shows again to him in his 2023 birthday:

"Ha ha ha!! ☆ Morisawa Blue has arrived~!
Fufu, just kidding. Getting a present made me over excited~♪
It's such an impressive-looking brooch, that it could be used as a hero transformation item."

-Rather, it's more like…

"It's more like an item from a show for girls? True, its design is probably much closer to the ones you see in those shows.
For those shows, the catchphrase when they transform is different from heroes, right? I wonder what sort of catchphrase I should go with?"