Remember the Victini guy I talked about before? Well now he's back with his Wishcash nicknamed, "Diancie plz". I show him mine. He then shows me his Skorupi and Foongus, named "YES" and "PLEASE!", respectively. He then goes through a bunch of Legendary Pokemon as I show him my Swirlix named "NO THANK YOU" or "ALREADY HAVE" each time. Every so often he show me his "PLEASE!" and then shows the same damn Legendaries I already told him I had! Even after I show him my "NO TRADE" Swirlix and quit, this guy just keeps asking for trades and showing me the Wishcash over and over again! It even got to him eventually showing me "MELOETTA" the Bidoof. I show him mine. Cycle repeats. I know I could just ignore him, but it has almost become amusing that he doesn't seem to be getting it. Or at least, why not use the Shout-Out feature to try to communicate something?!
Also, not really a Passerby experience, but it was a PSS one. Some guy shows me his Carbink...named "U+me=se-x".