So the other week, I was looking through literally every text block in Mother 3 to try and find unused text that wasn't documented on tcrf, and I did find something:
In chapter 7, after rescuing Duster, Kumatora says this: "Geez... Is this lucky or unlucky? I can't tell."
And Duster says in response: "You're all lucky. That's the only way I can see it..."
Originally however, Duster was going to respond with this:
And just to clarify, this isn't a mistranslation on the part of the fan translation, this is what my translation consultant had to say about the Japanese version of the line:
So yes, in an unused line, Duster flirts with Kumatora, make of that what you will. (Which is to say, I'm just the messenger here, don't shoot me lol. The fact this was written in and then subsequently not used in the final game could suggest many things, but I'm not trying to suggest anything myself.)
Here is the source by the way: https://web.archive.org/web/20160901224921/http://earthboundcentral.com/m3script/139.html
MOTHER 3 Script: Block 139