Secretegg

Secretegg is a new Pokemon that exists in Snakewood. It evolves from Mysteryegg starting at Level 30 and evolves into Hyperegg starting at Level 43. It is a Normal type pokemon with the ability Shell Armor. After evolving into a Hyper Egg, it can evolve into an Unown with a moon stone, an Entei with a fire stone, a Suicune with a water stone, a Raiku with a thunderstone, and a Celebi with a leaf stone.

Pokedex Entry #43
Type: EGG Color: Gray Height: 0.8m or 2'7" Weight: 12.0 kg or 26.5 lbs.

It still doesn't want to hatch, though it's redecorated its eggshell.If you break one open and look inside, you can see through time.