So far I've only managed to get an item from battle after using the move Surf. This knocked down a stone pillar that was in the background and gave me a hard stone, I believe.
I have tried a lot of other moves when I see stones, berry trees and sandpiles in the background, but can never get them drop an item. So what all moves will affect these? Also, are they area specific? For example will only certain berry trees be in Route "X"?
Best Answer
There are several background objects that drop items when you use certain moves:
These background objects can all be distinguished by the fact that they are directly behind the opposing Pokemon.