The third HM is as follows: HM03-Surf (It can be used as a powerful water attack or to navigate over water.)
defog is the third usable hm after you beat fantina, the hearthome gym leader.
In Third Generation Whirlpool is no longer an HM.
the third gym's HM is Strength. Receive from the Hiker who comes out of Mt. Mortar on Route 42
TM3 is Curse.
Defog
It is an HM you get from the third gym leader.
Rock Smash is a Hm you get when you get to the third gym. So, he doesn't learn it but you can make him learn it with that Hm
HM7 waterfall is found in the cave of origin on the third floor
where can i find hm fly in arcoiris ------ I have the same problem. It's in the third door too the right though. That's all I know. Hope I helped.
go to vermilion city and go to the boat on the third deck in a cabin
If you're talking about getting to the third boulder to push it into the pit, you don't need the hm waterfall. I thought so too, but then just try swimming up the upside down waterfall. It worked for me.
Possibly Thunderstruck - AC/DC. Not an orchestra, but your description only bring this to mind.