The Villain Guild (ヴィラン・ギルド Viran Girudo) is a secret alien organization that takes part in various criminal activities. They are under the lead of an Alien Zetton named Zolin.
The Villain guild is a crime organization formed by Zolin under the guise of "Zolin Corporation" (ゾリンコーポレーション Zorin Kōporēshon) as a front for him and his affiliates to operate within human society. They had been involved in several alien-related crimes since several years before the start of Ultraman Taiga. The organization was reported to EGIS from the External Affairs X Division, who fight against their members several times and foil their schemes. However, the Villain Guild continued to operate in America even after Zolin's arrest.
- Alien Zetton Zolin (leader)
- Markind (formerly)
- Maguma (formerly)
- Alien Kukaratch
- Cicada Human
- Rekyum Man
- Volk (formerly)
- Garmes Man
- Alien Serpent
- Alien Pedan
- Alien Keel
- Alien Bado El-Ray
- Firearms: The Villain Guild has a wide arsenal of weapons at their disposal. These include regular handguns and rifles to powerful energy blasters.
- Melee Weapons: The Villain Guild members use multiple melee weapons, from swords to bats.
- Spaceship: The auctioning of the Villain Guild takes place on a massive spaceship in orbit around the Earth.
- Monsters: The Villain Guild has monsters under their control.
- Belial Cells: As revealed by Mabuze, the Villain Guild has cells of Ultraman Belial.