Bombchu

Bombchu in Ocarina of Time are bombs that crawl along the ground and up walls. Link can find some for free, win some from the Bombchu Bowling Game and, after finding 40 Gold Skulltula Tokens, can collect some from the 4th son at the House of Skulltula in Kakariko Village.

Bombchu in Majora's Mask are self-animated. They are found in the dry, desert area of Termina and attack Link on his journey.

Bombchus are also what Rats holding a Bomb are called in Wind Waker.