How do you get Yancy / Curtis to call you?

Question

I've been just stuck on this. They said they would call often, yet I got called once (when I found the XTranceiver).
How do you make them call you? I want to trade with them.

Comments

http://pokemondb.net/pokebase/96924/how-can-i-call-yancy-again

I'm positive this goes for Curtis to.

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No, I mean how do you get her to call you.
Not how I call her.

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(/.-) (yes I got the facepalm)

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Curtis looks like my dream looks...

Answer 1

You have to be in a specific location on a specific tile.

Source