The Saffari Zone is located in Fuchsia, to the west of the Pokemon Center. It is a place where you can find rare Pokémon.
To enter you must be Diamond Account, and it has a cost of 1000 dollars, doing the following dialogue:
'hi, saffari, yes'
Remember that you should be with your Pokémon out and can not take any empty Poké Ball into the Saffari.
You can stay as long as you want inside the Saffari, but if you spend all Saffari Ball or if you are defeated, you will automatically be sent out of the Saffari Zone.
Note: If you die on Saffari, you will not lose experience points and neither Bless