"Cenozoic" (しんせいだい Shinseidai) is an archetype used by Jim Crocodile Cook in the Yu-Gi-Oh! GX anime. Like the "Mesozoic" and "Paleozoic" archetype, the only support is "Time Stream". This archetype is related to the "Fossil" and "Mesozoic" archetype.

Cenozoic (meaning "new life") is the current and most recent of the three Phanerozoic geologic eras, following the Mesozoic Era and covering the period from 66 million years ago to present day.