Hokkubokku

Hokkubokku or Hok Bok is an otherwise unnamed rare enemy that appears solely in the Turtle Rock dungeon of A Link to the Past. The Hok Bok is a bizzare segmented cactus-like creature that moves by bouncing around the room in diagonal directions. It is exceptionally bouncy; when it is hit with Link's blade, a segment will break off and bounce around the room violently. These segments can hurt Link, and along with the main body can cause a surprisingly large amount of damage to him, so attacking it with a blade can be risky. Risk does not come without reward however; if Link is able to destroy a bouncing segment before it vanishes it will often leave behind a useful reward like a Fairy or a big Magic Decanter. As the creature loses segments it will move faster and bouncer further. The final head segment will not rebound around the room, and will take a couple of blows to finish off completely. Using the Fire Rod allows Link to destroy the creature completely in one go, however.

Trivia

 * Hokkubokku are a lot like the Pokeys of Link's Awakening, who also lose segments when hit.
 * Hokkubokku often appear alongside Zols, and may possibly be related.