usually you can find them all over the game, but most of the time you first catch a paras or a parasect, and it probably be holding something. it will be either a tiny mushroom or a big mushroom.
There are generally two sources of mushrooms in leaf green/fire red. You can either pick them up off the ground (generally hidden), or you can catch a paras/parasect and they may be holding one.
capture the evolved form of paras in the wild at the safari and usually they will a big mushroom or if you are looking for the move rememberer i think two little mushrooms will do find them on paras in mt moon
You take them from either a paras or parasect Pokemon
In Mt. Moon you check on the rocks, you can catch some paracects it might have a big mushroom, and you can trade a nidoran for a nidoran the nidoran will have a tinymushroom
If you mean the TinyMushroom, the item can be found held by wild Paras and wild Parasect, occasionally.
You have to catch Paras and Parasects because they carry big and tiny mushrooms
You have to catch a few paras or parasects. There is a chance that they have a small mushroom or a big mushroom on them. After you've caught them, you can simply remove the mushroom from them and put it in your bag, thus enabling you to go to the man at 2 island and get him to teach your Pokemon moves. Sidenote: I think it is only parasect that carries the big mushrooms. (But it is more likely that you get a small mushroom from it too. The big mushrooms are pretty rare).
You can't.
All starters, including Bulbasaur, can't be caught in Pokemon LeafGreen.
If you trade Pokemon between leafgreen and ruby ruby will have your leafgreen Pokemon and leafgreen will have the ruby Pokemon both in the party they will not be sent to the PC unless you personally walk to the PC and do so.
Capture a paras in Mt.Moon and take it from it.(some times it may not have it)
use your firered or leafgreen and catch parasect it should be holding a big mushroom if not try again and when you get one give it to a Pokemon and transfor it to pal park.
You can. Island 2 on Leaf Green, there is a man that will teach your Pokemon moves for 2 tinymushrooms or 1 big mushroom.
You have to catch Paras and Parasects because they carry big and tiny mushrooms
On two island his house in next to the game corner.
You can catch PARAS and half of the time they should have a tiny mushroom it's evolved form has big mushroom. You can also teach one of your pokemon Thief or Snatch and it saves time and poke balls.
a mushroom is just like any other mushroom you can find tiny ones and big ones
if you have found a tiny mushroom, or a big mushroom, you can use that to teach new moves to your Pokemon. the move tutor is either in Fuchsia city, or Lavender town. you will need a big mushroom, or 2 little mushrooms. you can get them by catching either paras, or parasect.
the key is in the basement
Catch a bunch of Paras. They always hold tiny mushrooms. And Parasect also holds a tiny mushroom.
Basically just for selling
Paris, the little creepy crawly thing in the 'rock tunnel' has a chance of having it as an item when you catch it.