Route 757 intersects with Route 758 and leads you to Route 765. It's a savanna area so there will be more than enough places to obtain Pokemon here. it's pretty arid and dry so bring a lot of water for you and your Pokemon. No need to overheat from working to hard, yes? There are quite a lot of Pokemon here but most are the standard ranging from Houndhour, Nincada, Ninjask, Shedninja, Cubone, Cacnea, Murkrow, Trapinch, Geodude and Magnemite.
Good luck, Pokemon Trainers.
Pokemon:
Houndhour
Nincada
Ninjask
Shedenja
Cubone
Cacnea
Murkrow
Trapinch
Geodude
Magnemite