Instructions
Scour for Treasure Boxes
Click "Shop" in "PokeFarm" if you don't own the Suitcase or Berry Pouch.
Set the quantity of Suitcases and Berry Pouches to one, and then click "Buy Items."
Click "Farm."
Click one of the Scour Areas under Nearby Places. This takes you to the Scouring page.
Click "Send a pokemon on scour mission."
Click a Pokemon to send it on a mission.
Click a radio button under Scour Area to tell the Pokemon where to go.
Click a duration to set the mission's length. If you send the Pokemon on a long mission, there is a greater chance that it will bring back a rare item, such as a Treasure Box.
Get a Paid Account
Navigate to the "Premium Accounts" page.
Click the "Buy Now" button under the Premium Account or Ultimate Account options. Select a "Premium Account" to get a random Summon Item or an "Ultimate Account" to choose a Summon Item.
Follow the onscreen instructions to submit a payment. The Summon Item will be added to the Inventory on the Farm page.