Lucre

Lucre (commonly abbreviated L), sometimes referred to as gold (G) or gold pieces (GP), is the principal currency of the Mana series. As with many currencies in role-playing games, lucre is earned in battle or as a component of treasure as found in each world. It gives the player purchasing power for the sundry goods and services offered by shops and inns.

Final Fantasy Adventure
The amount of gold earned varies with each enemy defeated. Accumulated gold is displayed to the right of the status bar below the playfield. Due to the computational limits of the Game Boy hardware, the player can never accrue more than 65535 G at any one time. However, if the player has need of more, they should take note that certain foes may drop bags of gold, rubies, or opal that can be sold for fixed sums.

Adventures of Mana
Now retroactively referred to as GP, the acquisition method remains the same as above, but with the cap removed. The items that can be sold are now named (least value to greatest value) ruby baubles, gold dust, and diamonds.

Secret of Mana
Standard mechanics remain identical to Final Fantasy Adventure, though the sequel exchanges salable items in favor of small sums of GP from dropped chests. If the chest is not trapped and does not contain an item, it may instead have some GP in it.

Trials of Mana
Known as GP in the Western localization of the 2D version, enemies will drop a fixed sum of lucre with each one defeated. The currency is tallied on the menu screen, but is also displayed while shopping or before resting at an inn.

The 3D remake reverts to using "lucre", with any spoils tallied at the end of each battle and the total sum displayed in the main menu and while shopping or resting at an inn. Lucre can also be found as treasure in many locations throughout the world. Using an Incense item before battle can increase dropped lucre by fixed percentages for 15 minutes per use. In addition, performing specific actions in battle will increase the amount dropped. Finding Li'l Cactus a certain number of times during his sidequest will both raise the sale value and lower the purchase price of most items in shops, as well as making all inns free at any time.