|This article is about a/an monster in Kamen Rider, the original series.|
Trilobronzo (ザンブロンゾ Zanburonzo, 30, Rider vs Shocker & Rider vs Ambassador Hell) - A trilobite monster. Its emblem, worn by the Combatants of the outpost that created it, is a trilobite. Not a modified human, but a modified trilobite combined with a cyborg that feeds on human blood and needed to absorb it to keep its new form. It was able to switch between trilobite and Trilobronzo forms, remove parts of its shell to use as throwing weapons and spit acid. It was defeated by Kamen Rider 2's Rider Kick, becoming a trilobite fossil again. Trilobronzo returned briefly in the monster army of the Kamen Rider vs. Shocker movie but did not actually have an active participation there. Trilobronzo would reappear among the forces that ambushed Kamen Rider 1 in the movie Kamen Rider vs. Ambassador Hell. It was destroyed by Kamen Rider 1's Rider Punch.