on the game boy advance game called pokemon leaf green version, where do u find the other password ?

Question

tell me specificlay where 2 find the person that has the other pass word

Answer 1

You get the second password from the scientist in the dungeon on island 6

Answer 2

it quite is impossible to seize a mew with none style of sport modder (sport shark, action replay, etc.) till u locate somebody that has the sport and has mew and you commerce with that individual