Zetsumates

The Zetsumates (ゼツメイツ) are the trio of Ancient Debo Monsters who are infamous for causing the Cretaceous–Paleogene extinction event that wiped out the Dinosaurs. Though each was destroyed, the Zetsumates are resurrected by Chaos to stop Plezuon's return while getting revenge on the Kyoryugers. Though Debo Nagareboshi is destroyed, Debo Hyogakki and Debo Viruson offer their services to wreck Plezuon Lab. The revived Zetsumates' signature attack is the Deboth MetsuBall (デーボス滅ボール), each member adding his power into a ball before launching it at an opponent.

Debo Hyogakki
Debo Hyogakki (デーボ・ヒョーガッキ) is the first of the Zetsumates to be revived, Themed after an Impact winter, he is armed with his TsuraLaunchers (ツラランチャー) and can also launch the Hyogakki Ice Bombs (ヒョーガッキ・アイスボム) from his TsuraLaunchers. Sent to attack humanity, Debo Hyogakki ends up being destroyed by Kyoryu Red and Gabutyra. Later revived alongside his fellow Zetsumates, Debo Hyogakki aided in the attack on Plezuon Lab. After Deboth's death, Debo Hyogakki decides to exact revenge on humanity with his Freeze-cry Tactic (フリーズクライ戦法), where he turned peoples' tears into a freezing agent to turn Japan into the epicenter of a new ice age. Though he intended to use Yayoi, Debo Hyogakki is defeated by the Kyoryugers before being enlarged with him and his supporters destroyed by Bakuretsu Kyoryuzin. Voiced by Kenji Nomura (乃村 健次).

Debo Viruson
Debo Viruson (デーボ・ウイルスン) is the second of the Zetsumates that the Kyoryugers confront. Themed after a virus and armed with the ViruSpear (ウイルスピア), Debo Viruson is able to infect others with various diseases to do his bidding along with other skill including biomaniuplation and spawning clones of himself. Revived during the Middle Ages, Debo Viruson was seemingly destroyed by Kyoryu Cyan and Ankydon. But in reality, a piece of Debo Viruson ended up in Ankydon's Zyudenchi and regenerated, allowing the Debo Monster to infect the Zyudenryu over the centuries and projecting his image outside it. Though he inadvertently sabotages Canderrilla's scheme with Debo Bathisie, Debo Viruson offers his aid to her with the Nemunemu Sickness (ネムネム病), that makes humans fall into a permanent slumber filled with sweet dreams, as her singing voice increases the Zetsumates' power. But once tricked out of Ankydon by Amy, his heart broken in the process, Debo Viruson is destroyed by Kyoryuzin Macho. Later revived alongside his fellow Zetsumates, Debo Viruson creates Debo Computer Viruson (デーボ・コンピュータウイルスン) to aid in a scheme to destroy Plezuon Lab. Meanwhile, as his clone works to sabotage the lab, he is then drafted by Dogold to aid in producing a large amount of Restoration Water with his Good Culture Ability (グッド培養能力) to revive Deboth. However, enlarged after fulfilling his mission, Debo Viruson and Debo Computer Viruson both cease to exist when the former is absorbed by the reawakened Deboth. Voiced by Eiji Takemoto (竹本 英史).

Debo Nagareboshi
Debo Nagareboshi (デーボ・ナガレボーシ) is the last of the Zetsumates to face the Kyoryugers. He is themed after a meteoroid, the Chicxulub impactor that caused the extinction of the dinosaurs, and is armed with the NagareboShields (流レボシールド) and the Star HyuMachine (星ヒューマシン). Using meteorites on his abdomen, he can perform the Meteorite Balls (隕石ボール), Galaxy Balls (大銀河ボール), and Super Galaxy Balls (超銀河ボール) attacks. Revived in 6th century China, Debo Nagareboshi battled Kyoryu Grey before being sealed away within a volcano. However, in present day, Debo Nagareboshi is awakened by the power boost caused by Deboth's stirring. After learning of the deaths of Debo Hyogakki and Debo Wilson, Debo Nagareboshi vows to avenge his fallen comrades, yet, he, himself is ultimately destroyed by Kyoryuzin Kung-Fu. Later revived alongside his fellow Zetsumates, Debo Nagareboshi ends up being destroyed by Plezu-Oh in outer space. Voiced by Kazuki Yao (矢尾 一樹).