Plume Fossil in Cobblemon.
Plume Fossil in Cobblemon revives Archen. Find it at Prehistoric Birch Tree dig sites (birch forests) by brushing the suspicious sand or gravel, then put it in the Fossil Analyzer, fill the Restoration Tank with 128 points of organic material and wait 12 minutes.
Where to dig
Prehistoric Birch TreeBirch forests
What it revives
Archenrockflying401Base stat total from the 1.7.3 species files.
Reviving it
1Insert the fossilRight-click the Fossil Analyzer with a fossil. Galar hybrids need both matching pieces inserted.
2Fill the tankRight-click the Restoration Tank with organic material until it has absorbed 128 points. The tank's fill bar shows progress.
3Wait 12 minutesThe machine starts on its own once both conditions are met. The embryo grows through 8 stages, 90 seconds each.
4Claim the PokemonRight-click the tank with a Poke Ball to add the Pokemon to your party, or break the tank to release it as a wild Pokemon.
5Owner protectionOnly the player who started the restoration can claim it for the first 5 minutes after it finishes.