HM7 contains the move Waterfall.
In Pokémon Ruby Sapphire and Emerald versions, HM7 contains the move waterfall. You can find the HM in the Cave of Origin.
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
hm07 should be in the cave of origin on the way to groudon.see http://bulbapedia.bulbagarden.net/wiki/Cave_of_Originfor more info
Waterfall
Hm7 is waterfall, sorry im not sure where i found it though. :-)
Sunnyshore City.Defeat Volkner first...
It's in the Cave of Origin in Sootopolis city.
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.
Pokemon ruby's version IS Pokemon ruby.
Pokemon Ruby has Pokemon that Pokemon Sapphire does not and Pokemon Sapphire has Pokemon that Pokemon Ruby does not.