Steel Titan Pokemon?

[WaterLily]

Hi everyone. I feel kind of dumb for asking this since I just asked how to catch Wiglett. My problem now is I can't battle that big worm thing in the Steel Titan Lair.
Sneaking up on it doesn't seem to work. If I get to a certain step it just goes to the next hole. I basically cleaned out this Lair's items. I currently discovered a new trainer there I didn't know existed. Maybe if I continue through I'll discover something.
So, is the worm thing worth bothering with or is there some way to battle it?

 

[Sandslash Fan]

Do you mean the actual titan or the regular version you can catch after beating it? There are some walking around that aren't hiding that you can fight/capture.

 

[WaterLily]

Do you mean the actual titan or the regular version you can catch after beating it? There are some walking around that aren't hiding that you can fight/capture.

I take it this is the actual titan I'm talking about. I already had a battle near Artazon City. I'll keep looking.