This requires a Wii with internet access. Enter the "Avatar" menu and begin Tag mode. On the Wii, go to the Nintendo Channel. Enter the DS Download Service. Select a demo and have the Wii prepare it for download. When the Wii is transmitting the demo, an avatar balloon popup will appear after a few minutes. Select the balloon and use the scratch card. Exit the transmitting demo screen and go back into it. Select another demo on the Wii and repeat the process.