Mad Batter

The Mad Batter is a character from The Legend of Zelda: Link's Awakening. A talking bat, the Mad Batter is constantly being imprisoned in Magical Fountains by witches to whom he causes trouble to. Link can rescue the Mad Batter by sprinkling Magic Powder where he is resting. Believing it to be his revenge, the Mad Batter "curse" Link by granting him the ability to hold more items such as Magic Powder, Arrows and Bombs.

Etymology
It is likely that the Mad Batter is named after the Mad Hatter, a potentially crazy character from Lewis Carrol's story Alice's Adventures in Wonderland.