get it from the champion
Route 18.
HM Waterfall can be found on Route 18 in Pokemon Black and White.
It's on route 18
route 18
yes
you get it in route 18
you get HM waterfall on route 18
there is no hm waterfall that i know of
Somewhere on route 18
it is found on the ground at route 18
it is found on the ground on route 18
Surf, cut, fly, strength, waterfall, and dive