Coin

Coins are a collectable and the main currency in the Big Leaf series.

Big Leaf 2
Coins first appear in Big Leaf 2. Collecting them gives [Hello Hi HELLO] points.

Big Leaf PC
In Big Leaf PC, collecting 50 coins gives a battery. The coin counter resets after you exit the level.

Big Leaf: Medals of Courage
Coins do not appear in the overworld, but can be earned by killing monsters, destroying bushes, opening chests, and much more. They can be used to purchase many items.

Big Leaf: Adventure in the Dark World
AitDW has coins acting the same as MoC, but adds a 3D model seen when opening a chest.

Trivia

 * Coins have the roman numeral "I" engraved on them, meaning one.