Oddish, Bellsprout, Farefetch'd, Paras, Parasect, Charmander, Bulbusaur.
Teach HM Cut to a Pokemon and use it on the tree.
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.
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.
Vermillion gym. You have to get cut from the SS Anne first.
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).
Almost any Pokemon can use cut. Your chimchar or turtwig can use it
go to a small tree in your path press "a" and it asks you if you want to cut click on yes
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.
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.
Have one of your Pokemon use the move Cut.
Bidoof
In Celadon City, go to the bike path where you use cut. When you find the house, go inside and talk to the girl.