Instructions
Enter the "Shop" page and purchase the "Unown Report."
Enter the PokeFarm laboratory by clicking the "Lab" link on the main page. This page lists all of the eggs that Professor Holly has available for adoption.
Scroll through the list of eggs until you reach the Ditto egg, which is light purple in color. Click on the Ditto egg to adopt it. Return to the main page.
Click on the "Farm" link on the main page. Find the Ditto egg and click on it once per day until it hatches. Have your friends visit your farm and click on the egg also; this speeds along the hatching process.
Allow the egg to hatch, name the Pokemon when you are given the option and then wait for the game to inform you that the new Pokemon is a part of your farm. Stay on this page.
Look at the right side of the page and scroll down until you see a small icon in the shape of a piece of paper. Click on this icon to be taken to the Unown Report. The report shows your progress as you seek to breed all 28 of the Unown Pokemon.
Repeat the process of obtaining an Unown egg and hatching it until you've collected each of the Unown creatures. Check the Unown Report after each hatching to track your progress.