Archeops is a large, flying creature that bears similarities to a dinosaur. Its featherless, scaly head is red with a green stripe running along the top. Its mouth is filled with sharp teeth. Its eyes are white with black pupils and no irises. Its body is covered with frayed-looking, yellowish feathers with blue feathers designed for flight on its arms and legs enabling all four of its limbs to act as wings. All of these "wings" bear sharp claws. It has a ring of smaller green feathers on the ankles. Its tail is completely red and featherless except for a fan of blue feathers at the end, and as with the Archaeopterygiformes, it has fully-movable vertebrae in its tail instead of a pygostyle.
It is capable of flying, but is more adept at running. It can outrun even an automobile. It has the intelligence to work with its partners in order to catch prey. Archeops is extinct, but can be revived via fossils. Archeops is omnivorous, along with hunting for prey, it has been seen eating fruit in the anime.
Archeops and its pre-evolution are the only Fossil Pokémon without Hidden Abilities.
Archeops appears to draw inspiration from the Microraptor, a small, carnivorous dinosaur known for having wings on all four limbs, as well as Archaeopteryx, believed by scientists to be the earliest of all birds, also referenced by its species as the "First Bird" Pokémon. It may also be based on the Feathered Serpents of ancient Mesoamerican mythologies.
Archeops and Archeos may be derived from Archaeopteryx; the suffix -ops, which is common in dinosaur names; or the ancient Greek words αρχαιος (archaīos) meaning "ancient" and ωψ (ops) meaning "face".