Hello, hope you had a great day!
There is no guide as such but there are some good points of interest in each region.
Johto:
-Grinding just the early routes for the first levels till level 20
-Ruins of Alph Surfing till level 40-50
-Dragons Den/Victory Road from 50-100
Hoenn:
-Grinding just the early routes for the first levels till level 20
-Route 118 to level 40-50
-Victory Road for 50-100
Sinnoh:
-Grinding just the early routes for the first levels till level 20
-Route 222 to level 40-50
-Victory Road/Fight Area for 50-100
Hopefully, this assists you.
Enjoy the rest of your day!
Oh! That's what i want!
But what if my story haven't been so far to dragon den/victory road in johto/hoenn/shinoh ?
Where can i train my poke in 50-70(or maybe till 100)?