professor oak gives it 2 u after u beat the last gym leader in kanto
HM7 contains the move Waterfall.
Hm7 is waterfall, sorry im not sure where i found it though. :-)
Waterfall
hm7 waterfall is in the cave of orgin, sootopolis city, you have to go to the magma lair otherwise they won't let you in
In icefall cave.
In Pokémon Ruby Sapphire and Emerald versions, HM7 contains the move waterfall. You can find the HM in the Cave of Origin.
Sunnyshore City.Defeat Volkner first...
It's in the Cave of Origin in Sootopolis city.
HM7 waterfall is found in the cave of origin on the third floor
hm1 hm7 hm2 hm3 and hm5
It's in the ice path that leads to Blackthorn City.
I believe it is either HM6 or HM7.