Archen gain the opportunity to evolve into Archeops starting at Level 37.
Archen, like its evolved form are both based on the ancient bird, Archaeopteryx.
Archen doesn't have any differences to differentiate between male and female.
Archen can be received by reviving a Plume Fossil in Black, White, Black 2 and White 2. The Plume Fossil can be chosen over the Cover Fossil at Relic Castle in Black and White, but in Black 2 and White 2 the location of receiving the Plume Fossil is entirely different. After defeating the Elite Four, the Plume Fossil or Cover Fossil can be chosen at the Nacrene City Museum by speaking to Lenora.
The Plume Fossil can be obtained in Pokémon X, Y and Omega Ruby by using Rock Smash on breakable rocks in specific areas. They can be found at Glittering Cave in X and Y, and at different Mirage Islands in Omega Ruby.
Archen appears at Sun-Dappled Bank Treetops 2-1 and World Axle Treetops B2 in Pokémon Rumble Blast.
Trading Card Game
Archen is listed as an Uncommon Card in the Noble Victories set.
Wild Archen appear during the episode Archeops in the Modern World!, in which a wild Archen needed help learning how to fly. After eating a fruit that grew out of a tree, it evolved into an Archeops. Wild Archen also appear in two episodes that take place at Twist Mountain.
Archen has yet to make an appearance in the Movies.
Archen's Manga Information is unknown as of writing.
Archen is listed in the Not Fully Evolved Tier of Competitive Battling as it hasn't evolved yet.
Transfer Only Z-Moves
Via Move Tutor (Black 2/White 2)
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