you first have to battle the goldenrod gym leader then go next door to the flower shop, the lady will give you a bottle of water then go to that tree and push A then the tree will battle you you can catch it or defeat it then it will let you pass :)
a rock Pokemon disguised as a tree
nothing...
no , if you get luckey you might a Pokemon might fall out
get the squirt bottle and use it on the wiggling tree aka sudowoodo
I think it is the same as Pokemon diamond and pearl you use headbutt on a certain tree and a Pokemon could fall out of a tree
you get heracross or combees when you headbutt a tree
you get the squirtbottle at the flower shop and water the tree(which is Sudowoodo)
In the original Pokemon Silver you had to beat the 8th gym leader, Claire, then she allowed you to pass.
at mt silver and cut a tree at east
you have to get the sprinkle water and sprinkle it on the tree
just knock one out of a tree
you probably just get a special item and use it around the tree