Mew isn't in Leafgreen. Trade Mew from Emerald.
You can't get mew in firered or leafgreen.
mew and mew two
There is no Mew 3.
Mewtwo? Plus you cannot get Mew in Leafgreen or Firered.
You can't catch mew on leafgreen you need gameshark codes for that
no there is no mewthree
Mewtwo, yes, if you have a FireRed or LeafGreen with Mewtwo.
Mew has to be traded from emerald and ho-oh you have to get from Pokemon colosseum.
Cheatcodes or luck.