Where do you get the HM

In the Ice cave on 4 Island.

Sure?

Yes.


If you want to know exactly how to get it read the following:

When you get to Icefall Cave, sure to the left and go into the entrance at the north left. You'll have to walk past thin ice spots so when you get past the single one make sure you start at the left one and go right, then north (you can go right and grab the ultra ball if you wish, then walk around to the last ice spot and then go north and you should see an ice spot at the very top and one to the right... I think you go to the one to the right, I'm not exactly 100% sure since it's been a few months since I played it...

You'll then have to solve a little slipping ice trick to get down to the very bottom ladder. Go up the ladder and the HM should be to the left of the ladder.

Yes, he is right.