It's in the Icefall Cave on Four Island.
Waterfall
waterfall
its located on four island in the cave
In Icefall Cave, in Four Island
In icefall cave at four island.
in the cave on 4 island
No, it isn't but you can Rock Smash and Waterfall
In Icefall Cave, in Four Island
you get it in icefall cave on 4 island clear the ice to get to the ladder that will lead you to the HM waterfall.
Use the TM waterfall. I think.
Look for yourself thicko!
That can be found in icefall cave. also Seaking learn waterfall naturally at level 40