About that...what is the challenge supposed to be?

[ The lure of a haunted building was enough to catch Strange's interest. He has no idea what the challenge is supposed to be or how to even do a challenge in the first place. Something involving the ghosts? Which, he doesn't even have a Pokemon to begin with, though Strange doesn't realize it, he couldn't do the challenge even if he wanted to. ]

I could help out, if you wish. I've no idea how these things work so if I need to wait outside until you and your cat are done, simply say so.