Spade Panels, also known as Spade Bonus Panel Minigames or ♠ Panels are small panels on overworld maps in Super Mario Bros. 3 which can be used to earn extra lives for Mario or Luigi. Once they enter one, the player can play a minigame similar to a slot machine, in which parts of pictures slide past on panels and the player must line up three of the same panels to make a picture and win extra 1-Ups. There are Mushroom, Flower, and Star panels, granting 2, 3, and 5 extra lives when lined up, respectively, similar to the goal at the end of each level. If any of the panels are mismatched, no extra lives are awarded. N-Mark Spade Panels also appear at every 80,000 points gained, and they allow Mario or Luigi to play a card game where they must flip cards to match pairs of images with two mistakes allowed.
In the Game Boy Advance version (Super Mario Advance 4: Super Mario Bros. 3), if a Spade Panel is matched up correctly, further Spade Panels will change to Heart Panels. The Stars are replaced by Super Leaves that give 7 extra lives. Clearing one of these turns further Heart Panels into Club Panels, and the Super Leaves change to "3" icons that reward 10 extra lives. Clearing a Club Panel turns further panels into Diamond Panels, where only one picture can be lined up, making it impossible to lose. Earning a minimal amount of lives at previous panels will result in a mushroom picture, while higher amounts yield a random picture, and gives the corresponding amount of extra lives. If Mario or Luigi clears a Diamond Panel, or fails at any of the other ones, then all Panels will revert to Spade Panels, restarting the process.
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