Preheat oven to 350F.
Grease a cake pan (or line a cupcake tin if you're making cupcakes as well).
Make cake mix according to package directions.
Stir in the Watermelon Kool-aid packet and chocolate chips before adding additional red food coloring until you reach a pleasant pink color (you don't want a deep red).
Bake cake according to package instructions.
Allow the cake to cool as you prepare the frosting - this will help you roll the cakepops into balls.
Mix the butter, icing sugar, salt, vanilla, and cream together to make the frosting.
When the cake is cool, crumble it and mix in just enough frosting to be able to roll the cake-frosting mixture into balls.
Lay the cake balls on a lined baking sheet and freeze for an hour or overnight.
Before removing the cake balls from the freezer, melt the dark green candy melts along with 2 Tablespoons of the shortening in the microwave. Heat for 20 second bursts, stirring well in between each heating, until the candy melts are smooth and completely melted.
Dip each cake ball into the green candy coating and set to dry on the lined baking sheet.
Once all of the cake balls have been completely coated with the dark green candy coating, melt the light green candy melts with the remaining shortening.
Drizzle the light green candy melt onto the cake balls to imitate watermelon markings.
Allow to dry before serving.