StreetPass Mii Plaza (すれちがいMii広場, Surechigai Mī Hiroba) is an application which comes pre-loaded on all Nintendo 3DS systems.

The game revolves around a player's chosen Mii, which can be customized with accessories earned from minigames, along with a short customizable message and some optional information about likes.

Meeting the same Miis multiple times adds extra functionality, such as personalized messages and the ability to rate them.

Following this update, players can earn Plaza Tickets from purchasable games which can be exchanged for hats and outfits to customize their Mii.

A third update, which adds five more purchasable games and increases the capacity of StreetPass hits per session to 100, was implemented in September 2016.

In battle, similarly colored Miis can form teams to perform stronger combo attacks and spells.

A stage based on StreetPass Quest / Find Mii appears in Super Smash Bros. for Nintendo 3DS.

Two themes called Dark Lord and Save the World, Heroes!, which are music from Find Mii, appear as playable music that play on the StreetPass Quest/Find Mii stage in Super Smash Bros. for Nintendo 3DS and on the Miiverse stage in Super Smash Bros. for Wii U.

The game revolves around the Mii Force, led by the player, as they battle against the evil Gold Bone Gang.

Players traverse each level blasting through enemies and recovering Miis encountered on StreetPass, who each provide unique weaponry based on their color.

The game also features leaderboards, encouraging players to beat scores set by people encountered on StreetPass.

Job quests are available where the player is tasked with growing plants of specific qualities to fulfill customer requirements.

"StreetPass Labyrinth"), known in North America as Monster Manor, is a puzzle RPG developed by Prope.

Laying pieces of the same color together expands the room, sometimes revealing treasure chests that offer new weapons and items.

When entering a new room, the player may encounter an enemy, which they must face against using their equipped weapon, which uses rechargeable batteries to function.

StreetPass Fishing (すれちがいフィッシング, Surechigai Fisshingu), known in North America as Ultimate Angler, is a simulation game developed by Prope.

In this game, players use bait received from Miis encountered on StreetPass to try and catch various species of fish across several islands.

StreetPass Zombies (すれちがいゾンビ, Surechigai Zonbi), known in North America as Battleground Z, is an action game developed by Good-Feel.

Miis that are encountered via StreetPass can be found across each level, each carrying a unique weapon such as a Wii Remote, a bowling ball, and a paintbrush, which each have a limited number of chargeable special attacks.

StreetPass Trader, known in North America as Market Crashers, is a business simulation game developed by Good-Feel.

Brave Restaurant), known in North America as Feed Mii, is a cookery simulation game developed by Prope.

The concept involves cooking required dishes with 10 ingredients (which can be purchased with play coins or supplied by StreetPassed Miis).

Selecting the right ingredients leads to higher points and so the Miis make more progress in the quest adventure.

StreetPass Explorers, known in North America as Mii Trek, is an adventure game developed by Arzest.

[52] StreetPass Mii Plaza received generally positive reviews, with gaming journalists complimenting the built-in software.

[57] IGN described it as one of the best StreetPass games, complimenting it for giving the player an incentive to master each stage with a high score system.