The Plume Fossil.
You can obtain Archen by reviving it from a Plume Fossil. Plume Fossils can be found in the Wild Area during a specific weather condition such as the sun. Once you have the fossil, you can take it to the fossil restoration center in the game to revive Archen.
the woman in relic castle has two you get the cover fossil(which gives you tirtouga)or you get the plume fossil(which gives you archen)or if you go to icirrus city go to the cave go left to you have options go up then left then go up the stairs keep going straight out of the cave straight to you see the first cave left you'll see a cave soon go in go straighther's aman facing the wall go to him he'll give you the skull fossil which has cranidos you fly of walk to the Pokemon center at the 2nd gym put 1 Pokemon away go out to the gym go to the lady on the right hit a keep hiting a or if it's another device then ds watever control it is for yes and u can nicnam it.
The address of the City Of Fossil Museum is: , Fossil, OR 97830
In Pokemon LeafGreen, the Dome Fossil can be revived into Kabuto, and the Helix Fossil can be revived into Omanyte.
The answer is the fossil record :D
archen
Plume fossil I think
There is a lady with a backpack on she gives you either a plume fossil(Archen) or a cover fossil(tirtouga)
At the Relic Castle, you need to take the Plume Fossil. If you take the other Fossil you cannot get Archen.
Cover Fossil is Tirtouga. Plume Fossil is Archen.
First, you have to get the specific fossil from a backpacker in the Ruins that corresponds to Archen. Take that fossil to one of the counter clerks in the museum in Nacrene City. Keep leveling up the Archen until it evolves into an Archeops.
You don't. Archen comes from a plume fossil, obtained in Relic Castle.
Tirtouga from the Cover fossil, and Archen from the Plume fossil.
An Archen, which evolves into Archeops.
To find a archen in both versions, you need to go to the Relic castle and talk to the woman backbacker on the first floor and talk to here and she while ask you to take a fossil from her: the cover fossil which is titorga and a plume fossil is archen. Then fly to Nacrene city, and go to the gym and talk to the lady in blue on the right and she will resurrect the plume (cover) fossil into archen or titorga.
Bring it to Nacrene museum
You must revive its fossil.