I remember it is in a cave, where you rescue Kyogre. If you use flash, on the way to rescuing Kyogre, you will be able to see the HM lying on the ground in the same room as Kyogre.
It may be on the ground in the cave of origins, in Slaport city.
try using a Pokemon w/ the hm waterfall, isn't that obvious...
beat the 8th gym
you recieve the hm waterfall after you have deafeated the elite 4
it is in the Pokemon league where you use waterfall
you get charzard to do waterfall
it is inside the cave of origin
Get the waterfall hm!
to enter the elite four
you get it at cave of origin but you have to beat the gym leader of sootopolis city to use it on the waterfall to ever grande city
in meteorite falls, use waterfall on the waterfall at the top, and they are usually up there!!! FAIL whoever said that... you can't get it in emerald, needs to be traded from sapphire
In emerald the sprites are animated