How do i get to narra town

aight, i beat this zenith fucker and the girl told me she was going to the city where the old 8th gym was, and told me to go to narra town. i suppose its at the other side of mt nora, but almost at the end there are rocks that dont let me pass. How do i get to narra town pls?

Use heart swap beside the statue up the waterefall,then u will end up above the waterfall.Then enter the cave and nevigate through.U will end up in a new route.Follow it and u will reach Narra Town.

a screenshot of the loaction and the waterfall pretty please

did you go through the dark cave?