StreetPass Quest (also known as Find Mii) is a game that comes pre-installed as apart of the StreetPass Mii Plaza on the Nintendo 3DS. The game is a role-playing game in which players can use Miis collected from StreetPass to play with. The player must use the help of the Miis in order to save their own Mii. Each time you pass the same person, their Mii on your 3DS will be leveled up by 1. For 2 Play Coins, the player can hire a single hero (level 1-2). Depending on what animal you prefer, the hired Miis will either be dogs or cats. The player can earn hats from playing the game for their Mii.