A Great Ball can be found passed the first patch of tall grass to the east. This is also a way to go around the very first Pokemon Trainer, but it’s best to challenge every Trainer you see to earn money, experience, and add some Pokemon to your Pokedex.
Defeat Jody to earn P560. The path north will have a short dead end to the east. Investigate the rock at the dead end to find a hidden Tiny Mushroom.
Return to the main path and continue north. Across from the girl is another Zygarde Cell. To the west of the cell is a Pokemon Trainer after the patch of tall grass.
Defeat Bryan to earn P448. Behind the same Trainer is a Revive. Follow the path to the north to find another Trainer walking around a rock.
Defeat Scotty to receive P840. Follow the path east to a sign with tips on rearranging a Pokemon’s moves. South of this sign is a short path to an Adrenaline Orb. Continue to the east to find another Pokemon Trainer.
Defeat Ernie to earn P560. The path ends at a berry tree to the east and a short path to the south. Pick up the berries at the foot of the tree, then follow the path to the south to find an Energy Root. With Route 4 clear, head north to Paniola Town.