in the captains room in the SS boat at the 3rd city after you get the ticket from Bill at the 2nd city.
Teach HM Cut to a Pokemon and use it on the tree.
I don't know if it's the same as in the yellow version, but in the yellow version go as far west as you can in Celadon City; just before you come to the Snorlax there should be a tree you can CUT above you. Cut it and go through the building you find in there. When you come out the other side, you should see a little house. Inside is a girl and a bird Pokemon walking around. Talk to the girl and she'll give you the HM. Hope this helps :)
mew
there the same as blue and red version
That's the only way the HM cut isn't anywhere else.
In Flora sky the HM 'cut' is actually called HM air cutter. You find this HM in the underground tunnels of Searound city.
You need to get the hm cut then teach it to a grass Pokemon
No, venonat cannot learn the HM move cut
There is a house in Rustboro with a man who will give you the HM if you talk to him.
The first HM that you are able to use outside of battle is the Cut HM. You get it from talking to the captain in the S.S. Anne.
HM01 Cut is inside the ship, the S.S. Anne, where you find the captain. If you give him a backrub, he will be cured of seasickness and will give you the HM Cut. Be careful after this, because once he is healed, if you exit the ship you will not be able to return. Make sure you do everything here you need to before exiting.
In the Pewter Museum of Science in a backroom there is a scientist who gives it to you though you will need the HM Cut as there is a tree blocking the path.