What is up with the guy looking for his glasses and if you can find them..

You find the BlackSunglasses around where he was in that area, this raises the power of all Dark moves, you don't actually find his glasses.
He should really give Contact lenses a try!

There are no glasses, but if you take two steps away from him and press A you'll find Blackglasses.

Their in the area the guys at just use the ITEMFINDER. Once you find them talk to him once you talk to him he will give them to you their called the "BLACKGLASSES"

You have to use the itemfinder then get them (they're blackglasses I think) and I think he lets you have them or something.

You have to find them, they are on the ground. But it turns out they aren't his and you keep them, they power up dark type moves

The guy thats looking for the glasses is looking at the wrong spot. If you find it with a idem finder it is a blackglasses not glass.Then he goes away.

*I think you can't find him again*

If you use an itemfinder you're person will face the direction that it is. And if you spin around that means you're ontop of it

You can not find his glasses though you can find the Blackglasses. To find it keep using Itemfinder near him.

You use your itemfinder and you find blackglasses, black glasses ups the attack of dark pokemon. When you find them the guy ses that they are not his glasses and he goes.