Lucky Jewel

The Lucky Jewel, as featured in Super Mario RPG: Legend of the Seven Stars, ensures that Mario and his party get a LUCKY! Flower once per battle, if used before all enemies are defeated or run away. However, it can only be used a few times before vanishing completely from the player's inventory.

After the battle, the party may play the Wheeere's Yoshi?! minigame, giving them a chance to double either their coins or experience -- or lose it all if they pick the wrong egg.

It can be bought from the Treasure Hunting Toad.