Nookington's is the last upgrade of Nook's Cranny. Nookington's appears in Animal Crossing: Wild World when you spend 240000 Bells and having someone buy an item via wifi connection. However, in Animal Crossing: City Folk, you do not have to have a visitor. Nookington's, unlike the past upgrades, have a hair salon, more items and a second floor with Timmy and Tommy.
