Place cake crumbs in a large mixing bowl and add cream cheese or frosting gradually, mixing until the mixture is firm and moldable. This creates a sticky dough ready for shaping.
Use your hands to roll the mixture into small, smooth spheres, about the size of a golf ball. Place them on a baking sheet lined with parchment paper and chill in the freezer for 10 minutes to firm up.
While the cake balls chill, melt the chocolate in a microwave-safe bowl or double boiler, heating in short bursts and stirring until smooth and glossy.
Remove the chilled cake balls from the freezer and, using a toothpick or skewer, dip each one into the melted chocolate, coating evenly. Gently tap off excess chocolate and place the coated balls back on parchment to set.
Once the chocolate coating is firm, use small candies to decorate the center as a pupil and add edible gel or chocolate details for veins or eyelids to give each eyeball a creepy, messy look.
Finish by adding colored edible powders or sprinkles around the eyeballs for extra chaos and color. Place all the finished cake pops in a stand or styrofoam block to set completely before serving.
