Posting to say that you can also find Hawlucha in the grass on Route 2, but I think only in the morning. At least, I didn't see any during the day, and found one relatively quick upon setting my clock back.
As for Murkrow, it is definitely still there- bizarrely, it appeared for me when it normally does, on a windy night. Might have something to do with Pokesnax, since I had some with me, but I don't know for sure. I hadn't even finished the Aqua Gang quest yet...