The Zyglak are the evil group of reptilian race who served as villains in Bionicle. They a once accidentally created by the Great Beings in the past out of the remains of the process that brought the first Matoran villagers to life.
- In the "The Kingdom," the Zyglak refused to evacuate when the Great Spirit Mata Nui died and were evntually extinct.
- Zyglak are often called "The Great Beings' Mistakes."
- Zyglak also appeared to have the same characteristics with the Xenomorphs from the Aliens series.
- Both have the hatred towards the other living beings.
- Both seeks to spread their population across the universe.
- Both were responsible for killing a lot of living beings.