This is a walkthrough for Route 210 (South), including what Pokémon you can encounter and items you can find.
How to Get Past the Psyduck Barricade
To make Cynthia appear, you must obtain 4 Gym Badges and speak to the suspicious Galactic Grunt located in Pastoria City, near the Great Marsh entrance. When the Grunt runs away, chase him until he reaches Valor Lakefront (he will stop to rest every now and then).
Wild Pokémon - Tall Grass
|25% (Morning), 5% (Day/Night) [Shining Pearl]|
|10% (Morning/Day), 30% (Night)|
|25% (Morning), 5% (Day/Night) [Brilliant Diamond]|
|30% (Morning/Night), 50% (Day)|
Wild Pokémon - Poké Radar
|10% (Shining Pearl), 2% (Brilliant Diamond)|
|10% (Brilliant Diamond), 2% (Shining Pearl)|
Wyatt will only battle during the Morning.