Route 113
Route 113, Hoenn (from Pokemon Emerald).
Levels are this area's own. In your first region they stay as shown; in a region you open later they are raised to match your progress, unless you started that region fresh. See levels.
Outside
Wild Pokemon
Items
On the ground (item balls)
Hidden (use the Itemfinder or press A on the spot)
Glass Workshop
Items
Given by people