- Golett and Golurk have Light Clay.
- Poliwhirl and Hawlucha have King's Rock (which is pretty fucking important if you want a Drizzletoed).
- Roggenrola, Boldore, Geodude, and Graveler have Everstone.
- Shellder and Cloyster can have a Pearl (50% chance) or Big Pearl (5% chance)
Also, you should really note that Compound Eyes doubles the chances of finding a held item. Vivillon, Butterfree, or Galvantula get the job done very well.