U want mew?here is what to do!
u haf 2 have fly ok?
1.while u r in celadon buy about 10(i had five being stupid...)great balls and 10 revives and some potions drop by the pc and get a level 9 pokemon and one with sleep powder.
2.make sure u have not fought the dude above nbridge with slowpoke.go to underground path in celadon SAVE before you come out!take 2 steps down and quickley press start tell whoever to fly to cerulean and go up nbridge ur menu will be closed now OK fight the kid with slowpoke.MAY I WARN YOU THAT U MUST MAKE THEM COME TO U OR THE GAME WILL FREEZE.
3.when the battle is over fly to lavender and try to leave like u r going to saffron ur menu will pop up then press b.
4.mew will appear it will b lv.7 send out the weak pokemon and make a hit or 2 switch out with a pokemon that can make it fall asleep and use the move until it stays asleep,send out the weak one again until it is in the red it will take about 4-6 greatballs and there u go it can learn any move it only knows pound and the first move it will learn with u is transform.