Alright, so I've done a lot of searches involving the Whismur and Onix events but I can't seem to find what I'm missing to get the entire chain of events started. Here's a list of what I've done so far that may or may not be relevant to everything:
I have talked to both of the guys above the Peridot Pokemon Center, several times.
I have Pokesnax in my bag (a lot of them, actually).
I have talked to the Hiker outside of Peridot station.
I have made it to the end of Episode 11 (so I definitely have received the 1st badge).
Still, no Whismur appears. Does anyone have an idea of what else I might need to do?