To unlock the following, complete the following tasks:
Unlockable: --- How to Unlock:
Amusement Park --- Have an islander confess his or her love.
Cafe --- Have an islander confess his or her love.
Campground --- Send a traveler from your island, or have a traveler visit and camp on your island.
Clothing Store --- Have more than 1 male and 1 female islander, and solve 5 problems.
Compatibility Tester --- Have 2 male and 2 female islanders, and solve 30 problems.
Concert Hall --- Give a song to an islander who has leveled up.
Hat Shop --- Have 2 male and 2 female islanders, and solve 10 problems
Import Wear Shop --- Communicate via StreetPass or receive an import item via SpotPass.
Interiors Shop --- Save over $200.
Mii Homes --- Celebrate an islander wedding.
Nintendo 3DS Image Share --- Take a photo of a Mii's apartment using X or Y.
Park --- Have an islander confess his or her love.
Pawn Shop --- Get 5 different treasures.
Photo Studio --- Have 10 or more islanders, and solve 50 problems.
Port --- Activate StreetPass.
Rankings Board --- Have 5 or more islanders and solve 15 problems.
When you first unlock the Concert Hall, you'll only be able to do Solo Performances. To create Group Performances, two or more Miis have to learn the same song style.
Access To Extra Clothing And Hats
After an individual Mii has reached level 20, you'll unlock the option to give them any hats or clothing already in your collection. This is feature is available only for awarding Miis when leveling up.