Where is the gts in Alpha Sapphire?

[PrayashLand]

Lol I locked everywhere but I just couldn't find it! Help me?

Thanks!

 

[Robbie]

In the PSS menu,by selecting the PSS on Pokenav.

 

[Ninja-Patty]

PSS menu, on pokenav, u obtain this app after u first met up with wally at the petalbrug gym.