The Big Store Megavideo How Do You Get Tom Nook's Shop To Be The Big Department Store??

How do you get Tom Nook's shop to be the big department store?? - the big store megavideo

In Animal Crossing for GameCube, as you can shop at Tom Nook, the two-story department store to improve? I had the right and the business in front of everyone in my village have all the money they owe to be paid, but still used to update ... Please help!