You know how in Pokemon Platinum Version, the Eterna City Gym is surrounded by trees? Well, did you notice the Pokeball in the grove of trees? It looks like an item, but I can't get to it. I've tried looking for a way to get it, I've attempted to Cut the trees, nothing has worked, and I've been attempting to get to that Pokeball for years(not exaggeration).
Am I actually supposed to be able to get it, or is it decoration?