Shady Man

First time

(Shady Man): Hey, why hello there.... I'm Shady Man. Here's a map to Zekrom's Tower.... Don't tell anyone.

You acquire an item: Zekrom's Tower Map!

If you have a Dark-type/Ghost-type on your team (one-time)

(Shady Man): Here, 12 Dark Balls.

You acquire an item: 12 Dark Balls!