NPC Youngster Bill is resetting faster than the norm - noticed this bug this week (today is Thurs, June 16). It seems to be a daily reset, rather than cued by leaving the area (Route 1). Will update if I find the reset time is different.
Youngster Bill is the trainer on the left side of this map, accessible from the north via jumping down one ledge.
No battle issues, and Bill is the only NPC who battles on this Route.
Noted: I am in late-game (have beaten Kanto/Johto e4's), and found this only due to wanting to fast-travel down the ledges on the left, rather than through the grass on the right.
Thanks for your attention! :y: