Did you do anything out of the ordinary between battling the Hiker and returning to Route 24? I know things like that can sometimes affect whether you get the menu opening or a text box of some sort, though I've never really looked too much into it.
Hey. Does the Mew Glitch in R/B give differences in what happens just before the final encounter?
I tried playing around with some of the trainers north of Cerulean City after I got my Mew. One of the hikers resulted in me getting text from the Nugget guy after Nugget Bridge before my encounter (Lv.7 Nidoqueen BTW - from a level whatever Geodude)