In Shunishoart City.
Chat with our AI personalities
its in the icefall cave in island4
Jasmine will give HM Waterfall to you at the beach after defeating Volkner.
one of your party Pokemon has to know waterfall press A on the waterfall it will say it's a waterfall do you want to use waterfall say yes and you will go up the waterfall
u have to get waterfall from a girl on sunnyshore beach.
To get HM7 (Waterfall) in Platinum you can get it at Sunyshore City talking to Jasmine at the north of the city.