I believe my current Legendary Egg project is at 23 right now? ...to say nothing of the Mystery Egg, which I have only just begun. That is an entirely different beast, however. It does give me something to work on, at least.
After switching gears to the Mystery Egg (because getting a Legendary Egg to level 40 is taking a lot of time!), said egg is now Level 7. I believe Cadbberry was the first person to hatch one, and did so at Level 10? I'll be attempting this myself, to confirm for the Evo-Dex.
Confirmed Mystery Egg for the Evo-Dex. If Togepi still counts as an Egg (it counts as half an egg, by the looks of its sprite), it's level 14. Otherwise, my highest-leveled Legendary Egg is still level 23.
I'm so excited, it's at level 33 now! Not long before I find out what my darling Enterprise is to become