Single post in Lower Eggdex requirement to unlock Celebi

Finding various unown eggs isn't that difficult? I just kept my eyes peeled in the shelter for eggs that were labeled ??? as well as refreshed the lab often for the same. It's not impossible, just takes a bit of effort. If push really comes to shove, you can buy some unown from other users to breed different unown eggs that you don't have yet if you're really in a hurry. Again, possible, just takes some work.