You Don't. Only can be hacked in.
You cannot catch Mew in "Pokémon Ruby."or you can get mew-two in fire red or leaf green.
there no cheat to catch mew in pokemon ruby
You need to trade Mew from Emerald
you cant
I think that's all you can do in the game
You can't catch Mewtwo on XD, Colosseum, Ruby, Sapphire or Emerald. Mewtwo can be caught in the Fire Red or Leaf Green Version then traded over to Emerald, Ruby, Sapphire, Colosseum or XD.
Only if you have a code breaker and the master code for ruby plus the mew and mewtwo code
you didn´t get mew qith any cheats in ruby =( you can get mew with an mew-glitch in yellow (blue,red) or you can get a mew from my Pokemon ranch for diamant perl and platin but not for ruby the way to get mew in ruby is ... on a Pokemon tour (Pokemon-day ... , ) or with an cheat ... i hope i can help you :-)
you buy an gameshark then you catch him in emaerald or ruby or sapphire then you transfer him to diamond
as i know, in Pokemon emerald, ruby and sphere
you can't catch mew in Pokemon platinum you can only get it by cheats, mystery gift, migrate from a Game Boy Advance Pokemon game like fire red, leaf green sapphire, ruby, or emerald version.
In Red and Blue: He's in the Mystic Cave, you know, the one cave beside Cerulean City with the guy blocking the entrance the first time you go there. You need Surf though. But in FireRed and LeafGreen, you need an Action Replay to get Mew;Mew is replaced by Mewtwo in the Mystic Cave as described before. Pearl, Diamond, Sapphire, Ruby, and Emerald: Trade Mew to Sapphire, Emerald or Ruby, then over to Pearl or Diamond to get him in the latter games, but for the second gen. ones (Ruby, Sapphire, ect.) Just trade Mew from Blue, Red, FireRed or LeafGreen. My Mew is Lv. 100. :)yes, you can get mew in fire red also mewto.