Pokemon Black and White - Walkthrough - Lacunosa Town Pokemon Black and White: Walkthrough - Lacunosa Town
Lacunosa Town is different from any other town in Unova because the citizens go inside their house at night. Other than that, it is nothing special. There are two things to do here. First, if you bring a legitimate Shaymin to the girl on the first floor of the Pokemon Center, she will give you a Gracidea. You can use it to switch your Shaymin between Land and Sky Forms. Second, you can talk to the girl at the top of the stairs in the Pokemon Center. She will tell you the team you used to beat each Gym Leader. Head to Route 13 to the east when you're ready.

Items in Lacunosa Town:

Gracidea Show the girl on the first floor of the Pokemon Center a Shaymin.