For those of you who don't mind area backstory not revealed until late (I think) in the game:
In reality, those stones that line Route 10 are the graves of Pokemon. When the ultimate weapon was used to end that horrible war over 3,000 years ago, it stole the lives of all those Pokemon. Their lives were the price of peace then.
That's relatively dark for the series.
There're even Pokemon that wear hats.
... ... ... Does Mann Co. have any stocks in Game Freak?