The Zetsumates 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 Deboss MetsuBall, each member adding his power into a ball before launching it at an opponent.
- Their role call in their return episode, as well as their group attack, is reminiscent of Taiyo Sentai Sun Vulcan.
- It was never revealed who originally created the Zetsumates or what kind of emotional energy they are supposed to gather. It is presumed that Deboss himself created them as they have no visible totem mask anywhere on their body and only the Debo Monsters created by Deboss lack this feature.