help with ageis cave

how do u pass this place im been stuck in for 2 days and i cant finsh registeel area...

If any of your recruited pokemon have the Illuminate ability (such as Starmie or Volbeat), bring them along to spawn more Unown. Obviously, since you're looking to spell "steel", check your recruitment rate to see if those Unown are available. If a lot of the Unown you need are in the area, then you may want to consider just wandering about in there to get the Unown you need. Bring a Stamina Band; that way you can stay there longer. If you have multiple pokemon in your team that can reliably beat the Unown, have them Go the Other Way to maximize your search. Then be sure to pay attention so you know if the Unown your teammates defeat drop items.

I too have this kind of problem and is making me go crazy about this.

A bit of luck is required, but if you follow those tips and be patient, you'll prevail.