Game Guy's Magic Boxes
From the Super Mario Wiki
Game Guy's Magic Boxes is a Game Guy mini-game found in Mario Party 3.
[edit] Gameplay
When the mini-game starts, the two boxes are hidden by the curtains and may be switched; when that's done, the player must pick the box containing Toad instead of Baby Bowser. If successful, the player's coins are doubled. If the player picks the box containing Baby Bowser, the player loses all of his/her coins. The player can choose repeat the process multiple times to continue doubling their coins, but making even one mistakes still results in the complete loss of the player's coins. Additionally, players can only choose to double twice. Added to the one time that they are forced to play, the biggest win possible in this game is their original coins multiplied by 8. Players may also opt to quit at any time after the first win.
