You could say the Haunter was
haunting them.
-shot-

Dialogue:
I. Rosa: I think that guy is stalking us.
Nick: Why don't you go ask him?
II. Rosa: Who are you, and what're you doing?
Geoffrey: I don't have to answer that.
But you will soon be exterminated.
III. Rosa: Oh, really? What's a tiny guy like you going to do?

#TCoS#Pokemon#Gallade#Lilligant#Haunter