Bake Cake - Preheat your oven and grease your 13×9-inch cake pan. Prepare the cake mix according to the instructions on the box, using your choice of flavor. Bake the cake as the box says and allow it to fully cool on a wire rack.
Crumble Cake - Crumble your cake with your hands until it is in small pieces. Alternatively, you can crumble the cake using a food processor.
Add the Frosting to the Cake - With the cake in a large bowl, add the frosting. Mix the frosting together with your hands or a rubber spatula. In addition, you can also use a food processor to mix in the frosting. Process for 30 seconds at a time until the mixture comes together.
Form the Cake Balls - Using your hands, carefully from the cake mixture into balls. Make the cake balls about two tablespoons in size. Add them to a baking sheet lined with parchment paper and allow them to chill in the fridge for one hour.
Make the Seashell Candies - In a microwave-safe bowl, melt 10 ounces of the candy melts. Microwave in 30 seconds water until the candy is fully melted, stirring between each interval. Divide the melted candy evenly into three bowls.
Add blue food coloring to one bowl and green food coloring to another bowl. Fill the candy tray with the blue, green, and white melted candy. Place the tray in the fridge to set.
Dip the Cake Balls - Melt the remainder of the candy melts in a microwave-safe bowl. Dip the tips of the forks into the melted candy and then place the forks carefully into the cake balls. Let the cake balls sit for 10 minutes.
Divide the melted candy into three bowls, adding blue food coloring to one bowl and green food coloring to another. Carefully dip the cake bowls into the melted candy, alternating between colors. Place the cake pops on the parchment-lined baking sheets.
Decorate the Cake Pops - Right after dipping, add the sugar pearls and seashell candies to the cake pops. If desired, add Little Mermaid cake pop toppers. Let the cake pops set for 10-15 minutes.