Link with somebody that has it.
Level them up
No you can't
No, you cannot.
only way is to trade from another Pokemon game
yes, with the action replay go to www.cheathappens.com for the codes
You can't get them without ar, Nintendo event, or friends.
You can get an action breplay and download the code for it.
Level them up
no
No.
BUY IT
Get 50 Pokemon...
you have to trade from emerald
no you dop
No you can't
No, you cannot.
It is not possible to get all three starters in Pokemon LeafGreen without trading. This was an intended mechanic to encourage interaction between players.