How to get mew in pokemon fire red?

How to get mew in pokemon fire red

well apparently 'to get mew beat the elite 4 then go to oak`s lab to catch mew'

I dont have fire red but I've got pokemon yellow and all and all the other up to silver and gold versions...and in yellow you can get mew by=
Do not fight the gambler facing the house in between Lavender Town and Saffron City. Go to the door of the house and save your game. (You cannot save your game once you have started this or else it will undo the glitch that will give you Mew.) Step towards the gambler and immediatly press start. If done correctly you will bring up the start menu before the gambler sees you. Go to your flying pokemon and fly to Cerulean City. The gambler will then see you but you will fly away. (Your Start, A, and B buttons will not work during this point.) Walk up Nugget Bridge and then go to the 5th trainer after Nugget Bridge. (He will be facing up.) He is a youngster with a slowpoke. Defeat his slowpoke, and then your Start, A, and B buttons will function again. Fly back to Lavender Town and walk towards Saffron City. Your menu should pop up by itself. Hit B to exit it, and then you will enter a battle with a Mew, where you can try to capture it.

so if fire red has safron city and all that then this is a sure fire way to get mew...I know because I have him! :D
otherwise try the first thing.

I don't think you can unless you go to a nintendo event. I was po'd at that.