The PSS also gives you access to the Global Trade Station without the need to go to the Pokémon Center. Like before, you can put in any Pokémon of yours for trade with another Pokémon. However, unlike the past generations, in Pokémon X & Y, you can search for Pokémon you have not seen in your Pokédex yet, allowing for full Global Trading.

>However, unlike the past generations, in Pokémon X & Y, you can search for Pokémon you have not seen in your Pokédex yet, allowing for full Global Trading
>you can search for Pokémon you have not seen in your Pokédex yet

Serebii Confirmed. Now just the impossible requests fixed and GTS became perfect.