Mix the crumbled chocolate cake and chocolate frosting in a large bowl until cohesive.
Form the mixture into small balls, about 1 inch in diameter, and arrange them on a parchment-lined baking tray.
Chill the tray in the refrigerator for at least half an hour.
Melt the dark chocolate chips with coconut oil in a microwave-safe bowl, heating in short bursts of 30 seconds and stirring until silky.
Dip the tip of each lollipop stick into the melted chocolate and insert it into the center of a cake ball.
Dip each cake ball into the melted chocolate, allowing excess to drip off, and sprinkle colorful toppings if desired.
Stand the completed cake pops upright in a block of styrofoam or a cup filled with rice to let the chocolate harden completely.
Allow them to rest for about 30 minutes at room temperature.