The Gaikoko (ガイココ?)[1] is an enemy that appears in Sonic Labyrinth. They are a model of Badniks created by Dr. Eggman.


Gaikoko is a ghostly skull-type robot that appears out of thin air and hovers slowly along, spouting flame puffs from its jaws. The Gaikoko is invulnerable.


  • Gaikoko's name is derived from "gaikotsu", which means "skeleton" in Japanese.


  1. Sonic Labyrinth (Sega Game Gear) Japanese instruction manual p. 31.
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