Tom Nook runs your village shop which grows a lot to make it into a supreme shop, where he works with Timmy and Tommy and has a two story building. From Tom Nooks shop, you can buy wallpaper, carpets, roof paint (to change your roof's color), furniture, tools (such as fishing rods, nets, axes and spades), writing paper and seeds. Tom Nook will buy your unwanted stuff as well. Tom is also in charge of housing, making your house bigger.