Archen
The First Bird Pokémon
Type: Rock/Flying
Official Registration #: 566
Entry: A two-foot-tall Archaeopteryx pokémon. Although incapable of flying, this feathered pokémon once hopped from treetop to treetop in the ancient Unovan forests in order to forage for food. Remarkably, recent evidence has linked archen to all bird pokémon, meaning every bird pokémon in existence is really descended from this mighty, dinosaur-like creature. Every bird pokémon, that is, from the mighty braviary to the somewhat less mighty psyduck.
Archeops
The First Bird Pokémon
Type: Rock/Flying
Official Registration #: 567
Entry: The evolved form of archen, by battle experience. While these fast predatory pokémon were capable of flight, they much preferred chasing after prey on foot in large groups. Evidence suggests that these were vastly intelligent pokémon capable of coordinating well enough to take down prey much larger and stronger than any individual archeops. Thus, it is even more astounding that for all its cunning and swiftness, we refer to its modern-day counterparts as “birbs” and make memes out of them.
The Pokédex According to Bill 