Bombling

Bomblings are both enemies and items from The Legend of Zelda: Twilight Princess. Bomblings are a species of small, spidery insects that explode, similar to Bombs. Similar to Bombchus and their living counterparts, Real Bombchus, they are able to crawl along walls and floors before detonation.

Due to their liability to explode, Bomblings are considered an endangered species, however, recent propagation have produced positive results. They are apparently considered popular pets in Hyrule Castle Town, especially with the ladies, even though they are dangerous. They are usually found in natural areas such as the Forest Temple, where they, serving as makeshift Bombs, are needed to complete the dungeon and defeat Diababa. In the wild, they will attempt to attack Link unless stunned, whereby picking them up causes the Bombling to initiate a countdown to self-destruction unless thrown beforehand.

Bomblings as items
Eventually, in Kakariko Village, Barnes, the bomb salesman, receives stock of these specialty bombs that can be purchased and used outside of the Forest Temple area. The player will receive a letter after he completes the Lakebed Temple, indicating that the owner has stocked up on Bomblings. When used, these bombs will run in a straight line until they have contact with another object, at which point they will explode. If they are near an enemy, they will follow it. 10 Bomblings can be held in each bag. These bombs cannot be used underwater. When used in conjunction with an Arrow, thus making a Bomb Arrow, they are somewhat limited in their usefulness.