In Soothopolis, inside the Cave of Origin, where you catch Groudon
in the cave of origin
HM7 contains the move Waterfall.
HM08 Waterfall is in the Cave of Origin in Sootopolis City.
You go around the ocean until you find a waterfall, then you go up the waterfall with HM07.
You cannot go through waterfalls but you can climb them with the HM waterfall and a Pokemon that can learn it... you will also need the corrosponding gym badge
in the cave in sootoplis city when your going to fight groundon
Learn waterfall and go to EverGrande city
really rare in meteor falls need surf and waterfall to get to where bagon is
cave of origin. sotopolis city when you need to fight groudon
By itself:only goldeen,seaking With Tm:Mostly any water or dragon pkmn
I found it in Cinnabar Isle.. Where you get a sun stone i believe
get the hm waterfall (forgot were u get it) and go 2 the Pokemon league climb the waterfall and go in 2 victory road 2 the other side! Hope i helped! : )