How do I get the kings rock in Black2/White2?

Question

Where is a Kings Rock located in BW2?

Answer 1

Nuvema Town, Icirrus City (Show Level 50-98 Pokémon to Fan Club Owner)

Hope I helped :)

Answer 2

I got one in Castelia City's battle company. I had a Lillipup with 'Pickup' on my team. He did it for me. And you can always show a levelled up Pokemon to the Fan Club owner to get one.