I your moms bed!
Not at all mew is an event Pokemon for Pokemon emerald.
a
you have to cheat
Mew does not evolve, Mewtwo is a completely different pokemon.
I don't think you can get Mew in Pokemon FireRed at all. You have to trade a Mew from Emerald. You can go to http://www.serebii.net/pokedex-rs/151.shtml to see what I mean.
You need to trade Mew from Emerald
mew
rayquaza and mew!
Mew has to be traded from emerald and ho-oh you have to get from Pokemon colosseum.
You must capture Mew on Emerald and trade it to FireRed.
Mew can be migrated from Pokemon Emerald if that game was participated in the Japanese Mew event to get the Old Sea Map or have 999 Pokemon in Pokemon Ranch and Hailey will give you Mew.
you can't get mew on Pokemon emerald you only could get it by pokesav that's how i got my mew on emerald or you could use mystry gift event or action replay max or at least in toys r us once you got the old sea map or you are on faraway island when you see mew don't cut the grass or mew will disapear i did it before and it ranaway (disapeared) good luck catching mew