Archeops is a large, avian Pokémon that bears traits of both birds and reptiles. Its featherless, scaly snake-like 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, yellow and 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. Its plumage is very delicate.
It is capable of flying, but is more adept at running, taking a running start to take flight with its weak wing muscles. To achieve flight, Archeops must run nearly 25 mph by building up a speed of 2.5 miles. Archeops can hunt more efficiently when on the ground. Archeops is known to be intelligent, hunting for its prey in packs. One Archeops first corners the prey before another swoops down on it. It can outrun even an automobile. It has the intelligence to work with its partners to catch prey. Archeops is extinct but can be revived via fossils. Archeops is omnivorous; along with hunting for prey such as Omanyte, 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 Archaeopteryx, once believed by scientists to be the earliest of all birds; this is also referenced by its species as the "First Bird" Pokémon. It's body shape also resembles that of a Microraptor, which notably had feathers on its legs, like this Pokémon. It may also be based on the Feathered Serpents of ancient Mesoamerican mythologies, as well as European dragons in general.
Archeops and Archeos may be derived from Archaeopteryx and the suffix -ops, which is common in dinosaur names.
Archeops may also be from Cheops, the Greek name for Egyptian pharaoh Khufu. Some of the names of this pharaos have hieroglyphs in them which resemble birds and snakes.