Your Wants said:
Diglett Venonat Poliwag Heracross Slakoth Trapinch Beldum Deoxys Lucario Croagunk
OK, so I checked which ones I had and which ones I didn't have. Ufortunately I don't have Mewtwo, Hoppip or Dunsparce. I also checked my emerald, and I only have Trapinch on that. So to make it more simple:
Diglett Must breed my Dugtrio with Ditto. This I'll have after breeding in Adamant nature.
Venonat Still have to catch a Venomoth first. Will be random nature.
Poliwag I have to breed my Poliwrath. Poliwag will be Adamant.
Heracross I already have this. It's Adamant with Stone Edge (Lv. 1)
Slakoth The one I have is a bad nature and not UT. Will get you an Adamant one.
Trapinch Just have to send this guy over from Emerald.
Beldum Need to breed my Metagross. This will also be Adamant.
Deoxys As far as my checks have gone, I haven't found anything to suggest it's hacked. So I have it.
Lucario I was just hatching some eggs and a Timid Riolu hatched. Will train or keep UT.
Croagunk I will breed this as Adamant nature for you.
ITEMS I HAVE I THINK YOU WANT:
Choice Scarf
Choice Specs