Memory Block is a minigame that appears in Fortune Street. To play the minigame, the player must land on an Arcade Square. However this appears at random and does not appear at all if Arcade in the Custom Rules is set to "Round the Blocks only". A venture card also activates this minigame.
At the start of the minigame several cards are placed into ? Blocks, before being scrambled. The player must then choose a block and they get whatever was in that block. If the player gets a 1-Up Mushroom the value of their shops increases by 10%, if they get a coin they receive ten gold multiplied by their current level, if they get a Suit Yourself card then they receive a Suit Yourself card, and if they get a Bowser then all of their shops lose 5% of their value. In Standard Rules only, a card makes the player receive 10 of the most valuable stocks.
Sometimes, all of the blocks are the same size, so there is a chance that the player may get a Bowser card easily. That happens to first place the most. Otherwise the blocks is identified by whether it has a Bowser card or not.