They say that the secret bases can be modified to build labyrinths or traps for visitors and you can also make specific rules for combats and EVEN turn your base into a Pokemon Gym. You can also use StreetPass to visit other people's bases, face ne w challenges, turn their members into friends and also learn new abilities…

Sees secret bases confirmed

Oh, cool. People are gonna be really happy now.

Sees the multiple trainers, implying that other people can visit you in the base, such as your friends