On your nintendo wii, go to the news channel. When it is loading you may notice a cat in the top right , click on him , then he tells you about his sister cat, or he may say something else , but anyway once you've clicked on him, the loading image turns to cats instead of leaflets , keep hold of a and strike your wiimote across the cats , they make musical notes!, but you can find the other cat in the photo channel after youve chosen "fun!" you have to get it quick though!