Change the date in the system settings to gain more than 10 PlayCoins a day. Earn1 PlayCoin by taking 100 steps with the 3DS in sleep mode. With 2 PlayCoins you can buy either a Wandering Hero (Find Mii) or Puzzle Piece (Puzzle Swap).
Miis collected through StreetPassing become a "unit" that can be used in the dungeons. Each progress and attack made will carry over to the next time you enter Find Mii. If you StreetPass with the same person multiple times, that person's Mii will level up and become stronger. Also, the shirt color of your collected Mii units corresponds to the type of magic they use. Below are each magic type followed by their effects:
Summon a "wandering hero".
Next hero will gain extra power (level doubled)
New heroes that enter will get a morale boost.
Heroes are "full of daring" and less likely to be scared.
Burning flames (does extra damage against blue ghosts).
Sandstorm (lowers the chance of getting scared) and allows damage against enemies holding a yellow shield.
Poisons an enemy.
Attacks with water.
Puts all enemies to sleep. Increases the number of extra attacks by a random amount.
Clears dark rooms, and eliminates the effects of black magic. Deals damage to enemies weak to white magic at 3x level.
Grow 20 unique flowers and reach the rank of Master Gardener to have your journal upgraded into a more extensive version that covers every single possible type of flower in the game.You will also unlock a third seed box for extra storage space.