You get him/her at the start of the game OR when you have won against the pokemon league go to Saffron City and find Steven. He will give you the one of your choice of the other starter pokemon (not the one you first chose).
go to ash's mom and ask her to sack a treeco
You cant get treeco in silver its a 3rd gen Pokemon and silver is based on the 2nd gen
ok so you want a treeco then fine but i can show you how to get more ok so we all know that you can't catch treeco in diamond or pearl so which is why on your Pokemon emareld Sapphire or any other game boy game where you can get treeco in have a least five other Pokemon and treeco wihc makes six pokemen then on pearl beat the elite four and unlock migrating ability and the migrate treeco oh and if you want a whole army of treeco start over your game boyonce a day catch six wild Pokemon and a treeco and migrat it remember u can only do it once a day
you get it at the start of the game
beat elite 4 and reset chosse treeco get a Pokemon realse treeco and all Pokemon will be 5,50 or 100
Torchic, Mudkip, and Treeco
torchic mudkip and treeco
Get as starter in Ruby, Sapphire, or Emerald and migrate.
treeco,mudkip, and my favourite torchic.
In Pokemon LeafGreen Oak will never give you a Mudkip, Treeco or Torchic. This is primarily due to Leafgreen and FireRed being in the same generation as Ruby and Sapphire which has those starter Pokemon.
You can only transfer it from an older game.
You can only get Treeko as a starter in Pokemon Emerald.