First you go to the very right of the waterfall then jump up and click on the big bush
to find the cave on you need to help the lady at the top of the hills and after you help her she will tell you there's a cave behind the big bushes in front of the waterfall.
behind the bush
you will see a bush on the far right you click on it and then you see the cave
you go up to the plant on one of the edges to the second waterfall and then you click on the plant and you see the cave
You can find Waterfall in the Dark Cave.
You get waterfall in the cave of orgin. good luck
She's found above the waterfall you will need to use the move Waterfall to get up there you can find the HM for Waterfall in icefall cave.
When you have HM Waterfall just use waterfall with the big waterfall ;)
In HeartGold, you can find the HM Waterfall in the Ice Cave.
You find HM08 Waterfall on BF4 of the Cave of Origin
First you need to find the HM waterfall which is in the cave, second of all use waterfall to go up the waterfall that is at the beginning of the cave. Then go to the ladder and you will find Lorelei then you must battle a rocket grunt, defeat him and now you have saved lorelei.
To get waterfall, get the rainbow pass, and go to four island. At the end of Icefall Cave, you will find waterfall.