Beat all 16 Gym Leaders, then go to Prof. Oak in Pallet Town
Hm08 is rock climb not waterfall. Hm07 is the move waterfall
rock climb
you get it after you have all the gym badges from kanto and johto regions.
You get rock climb at the one of the gyms
After you defeat all 16gyms prof.Oak will call you on youre pokegear and tell you to come to his lab.He will give it to you there.
rock climb
you will find it on the ground but there is an ice puzzle to get it.
you can find the house towards the bottom half of Blackthorn city.
First, you have to get the HM strength, then teach it to and a Pokemon and you can move boulders.
Any Pokemon that can learn a electric move
To move up one floor in a building, find the elevator or stairs in the building.
press it and move it