Prepare cake mix according to package directions in a 9x13 pan
Allow cake to cool completely then crumble into a large bowl
Mix in frosting 1/2 cup at a time, until the mixture is very moist and clumps together easily (you might not need all 2 cups, it depends on the moisture of the prepared cake and how sweet you want your balls). Use your hands to mix really well or blend in a stand mixer using a paddle attachment.
Roll mixture into 1 1/2 inch balls and place onto a wax paper-lined cookie sheet.
Melt chocolate in the microwave or in a double boiler and add the tablespoon of oil or shortening.
Dip the end of the lollipop stick in the melted chocolate and insert about 1/3 of the way down into the cake ball. Repeat with all remaining cake balls. Freeze for 30 minutes or until balls are firm enough to dip.
Dip in melted chocolate, then swirl to drip off any excess coating.
Decorate as desired.