Only by trading with a friend.
you can't get it without trading, you have to trade from fire red or leaf green.
You migrate it from Ruby, Sapphire or Emerald. You get it from those games via Mystery Gift event.
you can get mew or mewtwo by migrating it from Pokemon yellow or ruby or by an action replay code u cant obtain it in the actual game
there no cheat to catch mew in pokemon ruby
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 can't in ruby.
mew is not on ruby u jaskass ... however if you obtain pokemon emerald myou may aquire mew on faraway island and transfer it along to ruby
Mew cannot be caught in the wild without using an Action Replay. Legitimately, you can obtain a Mew from Hailey on the Pokemon Ranch if you have acquired 999 Pokemon or trading for it from a nearby friend.
mew cant be caught in ruby unless you have a game shark
Nope.
You Get It By Trading