I couldn't miss the chance to practice my drawing!
The money underflow glitch is a glitch in Final Fantasy Legend III.
To activate the glitch, the player should use up all their GP so the party has less than 100 GP. Then they have to find an enemy that can steal GP from the party such has the Thief or Burglar enemies. Once the GP is successfully stolen, the player must run away from the battle. The player's GP will underflow, resulting in the party somewhere around 16.7 million GP. The amount of GP will reset to 999,999 if the player does anything that causes the game to attempt to increase their GP like selling an item, buying more than nine items, or win a battle.