to get hm waterfall u go to sunnyshore city. Go to the beach up north. DO NOT GO ON THE
BRIDGE. U should see a gym leader from JOHTO. talk to her after u finish the gym leader in
sunny shore city he is a eletric type trainer. she will give u hm waterfall.
if u need any help on the elite4 send a message to me. 
badman-64@hotmail.com