From Nookipedia, the Animal Crossing wiki
Super T&T (スーパーまめつぶ Sūpā Mametsubu?, Super Mametsubu) is the third expansion to Timmy and Tommy's store in Animal Crossing: New Leaf, after being upgraded from T&T Mart. The store looks similar in appearance to Nookway from previous Animal Crossing games. The upgrade will limit the hours of operation, in addition to expanding the selection of items for sale.
To upgrade from T&T Mart into Super T&T, the following prerequisites must first be met:
To upgrade Super T&T into T.I.Y., the following prerequisites must first be met:
Construction for the upgrades will take one day.
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