I know I probably look Unbelieveably stupid right now but I still haven’t found the way to Narra Town through Rose Crater, can I get a hint to which part of the Crater I am suppose to be looking in. Or what Pokemon I might need to proceed through the crater? Thanks.

In Deyraan town, use Heart Swap on the manaphy statue near the waterfall to enter Deyraan cave. This should lead you to Narra Town.