There are many different Mystery Boxes in Pet Society. Most of them are sold in the Mystery Shop while some are sold in the Food Store and the Boutique.
For more information on Mystery Eggs, see the Mystery Eggs page.
Standard Mystery Boxes
Standard mystery boxes are bought using normal yellow coins.
Current
Cheap Mystery Box -- aka the Red Mystery Box or RMB
Mystery Box -- aka the Blue Mystery Box or BMB
Expensive Mystery Box -- aka the Expensive Mystery Box or GMB
Win or Lose Box -- a Circus themed box often containing girly clothing
Discontinued
Pet Society Cash Mystery Boxes
Current
Discontinued Mystery Box
Food Mystery Boxes / Stalls
The Food Store also sells mystery boxes which contain random foods. Included in this category are food stalls. To use a food stall, you must buy this dispenser and place it in a room in your house. Clicking on it will let you buy a random food from the stall set. You can also buy food from food stalls in friends' homes.