The Streetpass Mii Plaza is some of the Nintendo 3DS's built in software that is meant to go hand in hand with the Mii Maker.
Uses StreetPass Technology and Nintendo Zone locations to gather Miis from other 3DS's and the Internet during event occasions (SpotPass) And at Nintendo Zone locations you get 6 StreetPasses from the last 6 people.
Stores data on every Mii that has been StreetPassed, and will update changes on every subsequent StreetPass.
Choose which Mii to use to greet other Miis and what Hat/Costume they will wear.
Choose a bio (Greeting, Likes, Dreams etc.) to show others.
Adds the VIP Room and StreetPass Birthday to the main menu (have to purchase Premium to use). Additional Tickets can be earned from StreetPass Birthday.
Updates to Game Pack 1
Find Mii II: Adds the Usagi Support option to the main menu (allows the StreetPass Bunny to help the player at the cost of Coins) and the ability to see what Hats you haven't collected on the Map (by holding X while you can see the Map)
Flower Town: Can now hold R to auto-read text. Holding R to fast-forward during Harvesting has been sped up.
Mii Force: Can now skip the level intro, level ending, and cutscenes by pressing B.
Additional Hats and Suits to buy with Tickets
New dreams for the future have been added to the profile menu, for StreetPass Zombies' release.
Adds Speech Bubbles, which are unlocked through Tickets to customize your StreetPass greeting.
Each of the 8 games you have access to in the Plaza give you a free Speech Bubble themed for them, in addition to a Thought-bubble and an StreetPass Bunny-themed ones given for free for updating.
Adds the Play Selector option to the main menu, allowing you to remove games from the Plaza (this does not uninstall them) and then restore them in any order, as well as allowing you to play them directly from its menu.
Games not actively in the Plaza will not be included when loading StreetPass Plaza with new Miis and it checks for games you haven't played yet, allowing you to ignore the games you have finished or don't play any more.
The Music Gallery is updated to include the new music tracks.
Puzzle Swap: The player collects pieces to 3D pictures by Streetpass and Play Coins.
Find Mii / StreetPass Quest: Hire heroes or use accumulated Miis to fight enemies in a turn based RPG fight to earn hats.
Find Mii II / StreetPass Quest 2: The sequel of Find Mii. To unlock you Will Need To complete Find Mii twice.