Fun fact! The only time time Satoshi looked impressed by something Serena did was when she spontaneously showed him how to approach Sihorn ("Sugoi...") - the other times, when she was trying to impress him or to express how she had been impressed by him, he just totally missed it or brushed it off like it didn't matter to him (although he did ask her whether he could eat the cookies, he didn't even thank her or compliment her on them :"D Awful brat, he's usually more polite than this.) Will the clash between expectation and reality intent and practicality be a running gag or something...?
Also, there maaaaaay be something about Serena's childhood as a whole in the future? I mean, girl stalked him, seemed a little annoyed that he didn't remember her (Satoshi didn't even know her name, she never said it in the flashback + when he finally remembered her, it was only as "the girl with a straw hat" and like an anecdote)... and she said she had "wanted to see and meet him" when she had seen him on TV because she felt "nostalgic" (natsukashii) about that encounter. That seems... a little over the top, even out of politeness/admiration/crush/squish? So, she... may not have any childhood friends, or friends at all in her town...? (Future flashbacks with the XY games' cast? /o/)