HM 07 - WaterFall - Situated on Fourth Island , From a Pokeball in IceFall Cave .
Hope i Helped , If i did , Recommend me Please , Thanks :D
route 18
there are 7 hidden machine found in Pokemon diamond:- rock smash cut strength fly surf waterfall rock climb defog (not in oder)
fashion district farm waterfall train station pawpark idk what the last one is.
Takigakure
lumbear yard waterfall scate park waterfall sunshine shores
fly,cut,rock smash,whirlpool,rock climb,waterfall,and surf
behind the bush
The Jinchūriki is from Takigakure (Village Hidden in a Waterfall).
Route 18
After you defeat the gym leader of Sunny Shore City there will be a girl near the Shore named Jasmine she will give you the Hidden Move Waterfall . Hope I helped . Your welcome .
it is hidden in mt.coronet in a cave you need hidden move "waterfall" to get it though
go to route 18