More reports:
1. Continuing a run showed different NPCs. Likely unintentional? Some interactions seemed somewhat broken. I spoke to the guy by the first bookshelf, but it seemed like I had to press Z a lot before anything advanced (unintentional?). I also talked to the guy who had Roxie as a coach; it seemed like an interaction with two NPCs, but the guy had a wall to his right, so I only saw dialogue from one of the pair.
2. Delcatty's Fake Out does not seem to trigger.
Some more bugs, in Battle Frontier:
3. Thunder shock's adjacency damage doesn't break Illusion.
4. Battle Frontier music sometimes doesn't loop correctly?
5. The opposing pokemon sometimes show the wrong level. Hovering over it shows a different level on the card, presumably the correct one.
6. Sometimes when initially choosing the pokemon move to use during a battle, both move options show up darkened.
7. I somehow caused the pokemon and move selection/auto-battle/pre-battle/start battle/shop/items/quit game menu to become out-of-sync, where the fading in-and-out rectangle became one unit to the right of the actual selected option. It's probably related to the item selection screen, since when I went back to the item selection screen and back out, the display fixed itself.