first off there is no such thing as a waterfall TM waterfall is an HM and it is located in the cave of orign in sootoplis city and can only be obtained when you enter to fight groudon/kyogre and if by some chance you miss it or ''forget' it then you will have to start the game again unless the last time you saved was before entering the cave.
There is not a tm for bite or crunch.
you can get it in seafloor cavern
at the game corner
In the Safari Zone
bendover and ill show you
There is not a tm for bite or crunch.
go to Sootopolis, then go to the cave of origin. You will find a pokeballl in there in which contains the TM Waterfall
Yes
You can find it on route 18.
Thunderbolt
Yes, Tm's in Pokemon Omega Ruby and Alpha Sapphire are re-useable
In meteor falls, you will need waterfall to reach him. He should be between lvl 30 and 35. You will find him in the same room as the TM Dragon Claw.
Trade.
25
Double Team
you can get it in seafloor cavern
Waterfall is a TM/HM. It needs to be obtained from the Sunyshore Gym Leader before it can be taught to a water-type pokemon.