Waste Not, Want Not is a sidequest available in Fossil Fighters: Champions. It is the only challenge to involve Dropping Fossils. To complete this challenge, the player must first talk to John Guano at The Hare Club on Cranial Isle. Guano wil tell the player that he wants Dropping Fossils, and he will handsomely reward him/her if he/she bring them to him. He will continue to ask for more each time you give him dropping fossils. The more dropping fossils the player brings to Guano, the better the reward he gives. He stop increasing the number of fossils when he reaches 20. From that point onward, bringing 20 Dropping Fossils to Guano will reward the player with a Miraculous Fossil Rock.