mew is an event exclusive unless you hack one.
1:pokemodifier
2:pokechanger
3:mystery truck
the mystery truck is a hack where you see a truck
in a city (dont know which one) and you use strength
on the back of it and it will move and under it will be a mew!
(the mew is not an uber it is a fake and may crash your game)
Edit1: the truck is a lie. it was a myth back when i was a child when red/blue/yellow came out. To get mew outside of gen 1 games, you need to cheat, get it from an event, or trade for it. Mew was only obtainable in gen 1 games via a tricky glitch. Google mew glitch if interested.
You must capture Mew on Emerald and trade it to FireRed.
having an action replay telleport cheat
So far only 5 games get the opportunity to capture mew in some way: Red version, Blue version, Yellow version, Emerald version and My Pokemon Ranch.
No, there are no glitches to capture Mew in Pokemon Emerald. Sry but the only easy way is to buy an Action Replay, the Nintendo Event is over.
Not at all mew is an event Pokemon for Pokemon emerald.
Capture Mew!
you have to catch it in Pokemon emerald. to catch it in emerald, you have to have the old sea map (event item). then talk to Captain Briney and he will take you to faraway island. then, mew will run around in the tall grass. eventually when you catch up with it, you will be able to capture it.
a
you have to cheat
Mew does not evolve, Mewtwo is a completely different pokemon.
You may capture a Machop in Fiery Path or Jagged Pass in Pokemon Emerald.
You need to trade Mew from Emerald