In Final Fantasy 2, after saving Hilda from the Arena, you can once again use the Keyword "Wild Rose" on her, ensuring that she is in fact the real princess. In the Advance version she responds with "Yes, it's me... why are you blushing?"
This image is from the NES translation. I am amazed I can't find the Advance one anywhere
Can you explain the significance of this to those who haven't played the game?
Just before heading to the Arena, you discover that the Princess has been replaced with a Lamia. She attempts to seduce you into her bed. Also, I believe it is the only instance in which an older keyword is actually used again later in the game. Hilda obviously has no idea specifically what happened with her double.
While this is fairly interesting, I'm sure more than a few people actually know about it. I don't personally see it as a "Did You Know" kind of thing.
I mean... I didn't know that. And I played the game twice. *Shrug*