C) Exploring The Pokémon Center

The Pokémon Center is the red roof building:

Interface:

1) Nurse: Heals your Pokémon.

2) PC: Manage the Pokémon, Check your mailbox, check the Pokédex and Hall of Fame.

3) Poké Mart: Buy and sell items.

4) Union Room: Interact Trainers directly.

5) Pokémon Wi-Fi Club: Trade or Battle using Nintendo WFC.

6) Global Terminal: Trade Pokémon around the world with Nintendo WFC.

7) Geonet: Used to register your location.

You can everytime tap the red X button on the touch screen to return to the overworld