Bomb Arrow
The Bomb Arrow is a combination of the Arrow and the Bomb (a Bomb that is shot) that appears only in Link's Awakening and Twilight Princess. It is essentially an exploding arrow. To use it in Link's Awakening, equip the Bow and Bombs, then press the buttons at the same time. To use a Bomb Arrow in Twilight Princess, move the cursor to any variety of bomb and press Z on the Wii version or L on the Gamecube version to assign Bomb Arrows to a button. Note that a bomb arrow can detonate and hurt Link just like a Bomb. Bomb Arrows consume both a single bomb and a single arrow per shot. But be careful, as if you hold the Bomb Arrow to the bow for too long the bomb will explode and you will take damage.
Bomb Arrows also appear in Link's Crossbow Training when holding the trigger to "charge a shot".