After defeating Gong in the mission "Legendary Night Sky" you can hunt in the same place, "Search for a lucky star". If one of your Patapon are killed while on this mission, the rain will stop in a future mission there, where you will fight a small monster and a gold Motiti. Before starting the mission be sure to not use fire weapons, as they will not hurt the Motiti. When you start the mission, take out the motiti first, then the monster. Out of the monster a star will appear and drop KaChing for you to pick up along the way. If you defeat the gold motiti, you will also recieve the black star which opens the path to a set of ruins.