There is no mew in sapphire.
go to how to get mew on sapphire.com
You can only get Mew in Pokémon Sapphire through Nintendo events which are no longer available as of 2007.
Mew is not available in Pokemon Sapphire through normal game play. You must use a GameShark with a hacking code to get Mew.
There is no possible way to get a Mew in Ruby or Sapphire. The only way to get one is from Nintendo events.
i dont think you can catch it in sapphire
Mew is one of the many Pokemon that does not evolve
you cant get mew in a gba game. YES YOU CAN! you can only get mew in a gba game!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
you can not
No
the exact same on ruby and Sapphire
inposibal