|“||These are nobody's friends. They are the Deadly Six and they are your worst enemies!||„|
|~ Dr. Eggman about the Deadly Six group.|
The Deadly Six is a villainous group of six Zeti that are the antagonistic group, and the primary antagonists in Sonic Lost World (as Eggman unexpectedly becomes the true antagonist).
According to Takashi Iizuka, the Deadly Six are meant to bring a “sense of danger and humor” to the story of Sonic Lost World. According to an interview with Takashi Iizuka at Summer of Sonic 2013, the Deadly Six are based off of "oni", which is a Japanese demon.
In Sonic Lost World, Doctor Eggman harnesses the power of the Deadly Six in an attempt to defeat Sonic the Hedgehog and conquer the world. However, the Deadly Six rise up against Eggman and break free, threatening to destroy the world on their own. As a result, Eggman is forced to team up with Sonic in order to stop them for good.
- Zavok: is one of the Deadly Six and the member behind the destruction of the world and the depletion of Sonic. Zavok is the leader of the six.
- Zazz: is one of the members of the Deadly Six in plans for the destruction of the world. He is the most savage member of the six.
- Zeena: is a member of the Deadly Six and the only female member who is also is in the plan for the destruction of the world. She is vain, but takes her job seriously when doing it.
- Master Zik: is one of the members of the Deadly Six and the oldest member of the six. Zik is the founder of the six and taught (and possibly adopted) Zavok. He is wise and extremely powerful.
- Zomom: is a member of the Deadly Six and the largest member of the six. He is very gluttonous.
- Zor: is a member of the Deadly Six and the spy of the group. He carries a blue rose with him at all times. He is depressing and appears to be suicidal.
- The Deadly Six are most likely killed at the end of their final battles, but Eggman saying he'll find another conch and control the Zeti again has suggested to some that they are still alive. It could be that Eggman didn't know they were dead, that he was planning to revive them with Chaos Emeralds, or that there are other Zeti besides the Deadly Six. Although the 3DS version has them they all fly away from their final battles, though this was reused animations from their first defeat in that version (possibly due to limitations on the 3DS), and the Wii U version (where they seem to have died) is the canon version, leaving their fate a mystery.
- All of the member's names starts with the letter Z.
- The Deadly Six are among the least popular villains in the Sonic franchise, with fans criticizing them as one-dimensional and stereotypical and their lack of backstory.