- Order: Shell Insect
- Suborder: Blende Insect
- Family: Raikouchuu
- Species: Great Thunderbug
There are many different species and mutations of Thunderbugs. The ones known are Old World Thunderbugs, Yukumo Thunderbugs, Flugerbugs, and Dracophage Bugs.
Great Thunderbug are Thunderbug that have been living in a special environment, in most cases an Elder Dragon. From being in a special environment for so long, this Thunderbug has become giant, making it larger and brighter than other Thunderbugs. A Great Thunderbug's extracts still conduct electricity, even after dying.
Great Thunderbug are calm until threatened by a predator. n reality, there is only one Great Thunderbug in a swarm. Around this individual are smaller, normal Thunderbugs that are attracted to its glow. Due to the Great Thunderbug's glow, it becomes the leader of the Thunderbug swarm. By being together in a swarm, the Thunderbugs, along with their leader, the Great Thunderbug, are able to release powerful shocks that can actually paralysis threats quite easily. By swarming around a Great Thunderbug, the smaller Thunderbugs are able to generate a more powerful shock that is stronger than a regular Thunderbug's shock. The Great Thunderbug is always in the center of the swarm and if killed the other Thunderbugs will go their separate ways.