Pokemon Black and White Walkthrough Part 3

Accumula Town field moves needed: (none)

Items                           Pokemart (lower clerk always)
  Pokeball                      Favored Mail       50   Reply Mail      50
                                      Greet Mail           50   RSVP Mail      50
                                      Inquiry Mail        50    Thanks Mail   50
                                      Like Mail             50

Step 1: Prof. Juniper guides you
Go to the Pokemon Center and Prof. Juniper will guide you through the building.

Step 2: Check the PC
Inside the Pokemon Center is a PC (Pokemon storage system). Check your PC, and read the meaningless mail Bianca has sent you.

Step 3: A speech in the plaza
Alright, first of all, don't worry, it is't you making the speech. Other than that, this part of the story speaks for itself.

Step 4: A mysterious person named N speaks to you.

Battle the mysterious N! 1
Purrloin Lv. 7, Dark

Step 5: Look around town
Go inside buildings, look around (remember, there's a Pokeball lying around).

Step 6: Head west to, Route 2......