Once the HM is taught to one of your pokemon, go into your party while facing the tree you want to cut, select that pokemon, and it will be on the list that shows up (summary etc).
Teach HM Cut to a Pokemon and use it on the tree.
Vermillion gym. You have to get cut from the SS Anne first.
Oddish, Bellsprout, Farefetch'd, Paras, Parasect, Charmander, Bulbusaur.
A tree will be blocking the way so you will need to use Cut on the tree to get past it. You can get Cut from the Captain of the SS Anne. You need the 2nd badge (Cascade Badge) in order to use Cut outside of battle.
In Generation I (Red, Blue, Green, Yellow), the Pokemon who can use cut are: Bulbasaur, Ivysaur, Venusaur, Charmander, Charmeleon, Charizard, Beedrill, Sandshrew, Sandslash, Bellsprout, Weepinbell, Victreebell, Tentacool, Tentacruel, Farfetch'd, Krabby, Kingler, Lickitung, Tangele, Scyther, Pinsir, and Mew. In Pokemon Yellow, Kabutops, Diglett, and Dugtrio can also learn Cut.
To effectively cut off a yellow bamboo stalk, use a sharp tool like a saw or pruning shears to make a clean cut at a 45-degree angle just above a node. This will help the plant heal properly and promote healthy growth.
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.
You aqquire HM01 Cut on the SS Anne from the Captain.
You simply teach your Pokemon cut, go on start, select Pokemon, select the Pokemon you tought cut, and then select cut at the tree u want to cut down. You simply teach your Pokemon cut, go on start, select Pokemon, select the Pokemon you tought cut, and then select cut at the tree u want to cut down.
You get it as a gift from an agent trapped on top of the yellow lazer shock building( tip: use the knife thingy to cut the metal)
=After you get cut which is on the ship .=
You Should Cut The Yellow Wire! : D