on route 18
On route 18
It is on Route 17, on the western island.
route 18
HM Waterfall can be found on Route 18 in Pokemon Black and White.
Deep in route 17. You need surf to get there
to bad
You surf out from rout 18 and you will eventualy reach a island.You can find HM4 waterfall there.
go to route 11 but you must have the HM waterfall. it's there.
route 18
yes
You can find Waterfall in the Dark Cave.
Waterfall can be found on route 18